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Source: https://devhubby.com/thread/how-to-mock-exception-in-jest

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Swift
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<span class="caption" data-v-3262fcae>2 years ago</span></div>  </div> <div class="col col-12" data-v-3262fcae data-v-3262fcae><div class="forum-text ql-viewer" data-v-3262fcae><p>how to mock exception in jest?</p></div> <div class="d-flex justify-start flex-wrap flex-lg-nowrap flex-md-nowrap flex-xl-nowrap flex-sm-nowrap" data-v-3262fcae><div class="text-center text-lg-left text-md-left text-xl-left text-sm-left col-sm-5 col-md-4 col-lg-2 col-xl-2 col-12" data-v-3262fcae data-v-3262fcae><div class="like-dislike-buttons pt-3" data-v-0348114a data-v-3262fcae><span class="v-badge v-badge--overlap theme--light" data-v-0348114a><span draggable="false" class="v-chip v-chip--outlined theme--light v-size--default info info--text" data-v-0348114a><span class="v-chip__content"><div class="d-flex justify-center" style="--primary-color:#FF6B00;" data-v-0348114a><a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-up theme--light" data-v-0348114a></i> <small title="53 likes" class="like-dislike-buttons__count" data-v-0348114a>53</small></a> <span class="separator" data-v-0348114a>|</span> <a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-down theme--light" data-v-0348114a></i> <small title="no dislikes" class="like-dislike-buttons__count" data-v-0348114a>0</small></a></div></span></span><span class="v-badge__wrapper"><span aria-atomic="true" aria-label="Badge" aria-live="polite" role="status" class="v-badge__badge error" style="bottom:calc(100% - 12px);left:calc(100% - 12px);right:auto;top:auto;">53</span></span></span></div></div> <div class="col-sm-7 col-md-8 col-lg-10 col-xl-10 col-12" data-v-3262fcae data-v-3262fcae><div class="justify-center icons d-flex col col-12" data-v-11d4c0a4 data-v-11d4c0a4 data-v-3262fcae><a href="https://www.facebook.com/sharer.php?src=sp&u=https%3A%2F%2Fdevhubby.com%2Fthread%2Fhow-to-mock-exception-in-jest&quote=how%20to%20%23mock%20exception%20in%20%23jest%3F&hashtag=%23mywebforum" rel="nofollow noopener" target="_blank" title="Facebook" data-v-11d4c0a4><img src="https://forum-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/fb.png" width="32" height="32" alt="Facebook" data-v-11d4c0a4></a>   <a href="https://twitter.com/intent/tweet?url=https%3A%2F%2Fdevhubby.com%2Fthread%2Fhow-to-mock-exception-in-jest&text=how%20to%20%23mock%20exception%20in%20%23jest%3F&hashtags=mywebforum" rel="nofollow noopener" target="_blank" title="Twitter" data-v-11d4c0a4><img src="https://forum-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/twitter.png" width="32" height="32" alt="Twitter" data-v-11d4c0a4></a> <a href="https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdevhubby.com%2Fthread%2Fhow-to-mock-exception-in-jest" rel="nofollow noopener" target="_blank" title="LinkedIn" data-v-11d4c0a4><img src="https://forum-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/linkedin.png" width="32" height="32" alt="LinkedIn" data-v-11d4c0a4></a> <a href="https://telegram.me/share/url?url=https%3A%2F%2Fdevhubby.com%2Fthread%2Fhow-to-mock-exception-in-jest" rel="nofollow noopener" target="_blank" title="Telegram" data-v-11d4c0a4><img src="https://forum-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/telegram.png" width="32" height="32" alt="Telegram" data-v-11d4c0a4></a> <a href="https://api.whatsapp.com/send?text=https%3A%2F%2Fdevhubby.com%2Fthread%2Fhow-to-mock-exception-in-jest" rel="nofollow noopener" target="_blank" title="Whatsapp" data-v-11d4c0a4><img src="https://forum-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/whatsapp.png" width="32" height="32" alt="Whatsapp" data-v-11d4c0a4></a> </div></div></div> <div class="row py-0" data-v-3262fcae data-v-3262fcae><div class="text-center col" data-v-3262fcae data-v-3262fcae><a href="/tag/jest" draggable="false" class="mr-2 mb-1 v-chip v-chip--clickable v-chip--label v-chip--link v-chip--outlined v-chip--pill theme--light v-size--small secondary secondary--text" data-v-3262fcae><span class="v-chip__content"><span class="secondary--text text-decoration-none font-weight-bold" data-v-3262fcae><i aria-hidden="true" class="v-icon notranslate mx-0 v-icon--left mdi mdi-pound theme--light secondary--text" style="font-size:16px;" data-v-3262fcae></i>jest
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2 answers
</h4> <hr role="separator" aria-orientation="horizontal" class="v-divider theme--light"> <div tabindex="-1" role="listitem" class="v-list-item theme--light"><div class="v-list-item__icon best-answer"><span class="v-tooltip v-tooltip--bottom"><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-up theme--light success--text" style="font-size:40px;"></i></span></div> <div class="row post-row" data-v-145a8bfc data-v-145a8bfc>     <div class="col-sm-3 col-md-2 col-lg-1 col-12" data-v-145a8bfc data-v-145a8bfc><div itemscope="itemscope" itemtype="http://schema.org/Person" class="avatar text-center" data-v-145a8bfc><div><div class="v-avatar" style="height:50px;min-width:50px;width:50px;"><div aria-label="carey" role="img" class="v-image v-responsive theme--light"><div class="v-image__image v-image__image--preload v-image__image--cover" style="background-image:;background-position:center center;"></div><div class="v-responsive__content"></div></div></div></div> <p class="my-0 caption">Member</p> <div><a href="/profile/carey" class="d-inline-flex"><p itemprop="name" class="subtitle-2 mb-0">
carey
</p></a></div> </div></div> <div class="col-sm-9 col-md-10 col-lg-11 col-12" data-v-145a8bfc data-v-145a8bfc><div class="pt-0 col col-12" data-v-145a8bfc data-v-145a8bfc><span class="caption" data-v-145a8bfc>by
<a href="/profile/carey" class="d-inline-flex caption" data-v-145a8bfc>
carey </a></span>,
<span class="caption" data-v-145a8bfc>2 years ago</span></div> <div class="forum-text ql-viewer" data-v-145a8bfc><p><span class="mention"><span><span><span class="mention"><span><span><span class="ql-mention-denotation-char">@</span>cassandra</span></span></span> </span> </span></span></p><p>In Jest, you can use the <code>jest.fn()</code> method to create a mock function, and then use the <code>.mockImplementation()</code> method to make the function throw an exception when it is called. Here is an example:</p><div style="color:#f8f8f2;background-color:#272822;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tbody><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 1
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</span></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="color:#66d9ef">const</span> <span style="color:#a6e22e">myMock</span> <span style="color:#f92672">=</span> <span style="color:#a6e22e">jest</span>.<span style="color:#a6e22e">fn</span>();
<span style="color:#a6e22e">myMock</span>.<span style="color:#a6e22e">mockImplementation</span>(() => {
<span style="color:#66d9ef">throw</span> <span style="color:#66d9ef">new</span> Error(<span style="color:#e6db74">'My error message'</span>);
});
<span style="color:#66d9ef">try</span> {
<span style="color:#a6e22e">myMock</span>();
} <span style="color:#66d9ef">catch</span> (<span style="color:#a6e22e">e</span>) {
<span style="color:#a6e22e">console</span>.<span style="color:#a6e22e">log</span>(<span style="color:#a6e22e">e</span>.<span style="color:#a6e22e">message</span>); <span style="color:#75715e">// "My error message"
</span><span style="color:#75715e"></span>}
</pre></td></tr></tbody></table>
</div>
<p><br/></p><p>You can also use <code>jest.fn().mockImplementationOnce()</code> to only throw the exception on the first call, and then have the mock function return normally on subsequent calls.</p></div></div>  <div class="text-center text-lg-left text-md-left text-xl-left text-sm-left col-sm-5 col-md-4 col-lg-2 col-xl-2 col-12" data-v-145a8bfc data-v-145a8bfc><div class="like-dislike-buttons pt-3" data-v-0348114a data-v-145a8bfc><span class="v-badge v-badge--overlap theme--light" data-v-0348114a><span draggable="false" class="v-chip v-chip--outlined theme--light v-size--default info info--text" data-v-0348114a><span class="v-chip__content"><div class="d-flex justify-center" style="--primary-color:#FF6B00;" data-v-0348114a><a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-up theme--light" data-v-0348114a></i> <small title="2 likes" class="like-dislike-buttons__count" data-v-0348114a>2</small></a> <span class="separator" data-v-0348114a>|</span> <a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-down theme--light" data-v-0348114a></i> <small title="no dislikes" class="like-dislike-buttons__count" data-v-0348114a>0</small></a></div></span></span><span class="v-badge__wrapper"><span aria-atomic="true" aria-label="Badge" aria-live="polite" role="status" class="v-badge__badge error" style="bottom:calc(100% - 12px);left:calc(100% - 12px);right:auto;top:auto;">2</span></span></span></div></div>  <div class="col col-12" data-v-145a8bfc data-v-145a8bfc><hr role="separator" aria-orientation="horizontal" class="v-divider theme--light" data-v-145a8bfc></div></div></div><div tabindex="-1" role="listitem" class="v-list-item theme--light"> <div class="row post-row" data-v-145a8bfc data-v-145a8bfc><div class="py-0 col col-12" data-v-145a8bfc data-v-145a8bfc><div data-v-145a8bfc></div></div>     <div class="col-sm-3 col-md-2 col-lg-1 col-12" data-v-145a8bfc data-v-145a8bfc><div itemscope="itemscope" itemtype="http://schema.org/Person" class="avatar text-center" data-v-145a8bfc><div><div class="v-avatar" style="height:50px;min-width:50px;width:50px;"><div aria-label="trenton_kirlin" role="img" class="v-image v-responsive theme--light"><div class="v-image__image v-image__image--preload v-image__image--cover" style="background-image:;background-position:center center;"></div><div class="v-responsive__content"></div></div></div></div> <p class="my-0 caption">Member</p> <div><a href="/profile/trenton_kirlin" class="d-inline-flex"><p itemprop="name" class="subtitle-2 mb-0">
trenton_kirlin
</p></a></div> </div></div> <div class="col-sm-9 col-md-10 col-lg-11 col-12" data-v-145a8bfc data-v-145a8bfc><div class="pt-0 col col-12" data-v-145a8bfc data-v-145a8bfc><span class="caption" data-v-145a8bfc>by
<a href="/profile/trenton_kirlin" class="d-inline-flex caption" data-v-145a8bfc>
trenton_kirlin </a></span>,
<span class="caption" data-v-145a8bfc>a year ago</span></div> <div class="forum-text ql-viewer" data-v-145a8bfc><p><span class="mention"><span><span><span class="mention"><span><span><span class="ql-mention-denotation-char">@</span>cassandra</span></span></span> </span> </span></span></p><p>Here's an example of using jest.fn().mockImplementation() and jest.fn().mockImplementationOnce() to mock an exception in Jest:</p><div style="color:#f8f8f2;background-color:#272822;">
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<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;">// Mock function to throw an exception
const myMock = jest.fn().mockImplementation(() => {
throw new Error('My error message');
});
// Call the mock function and catch the exception
try {
myMock();
} catch (e) {
console.log(e.message); // "My error message"
}
// Mock function to throw an exception only on the first call
const myMockOnce = jest
.fn()
.mockImplementationOnce(() => {
throw new Error('My error message');
})
.mockReturnValue('Normal return value on subsequent calls');
// Call the mock function multiple times
try {
myMockOnce(); // Throws an exception
} catch (e) {
console.log(e.message); // "My error message"
}
console.log(myMockOnce()); // "Normal return value on subsequent calls"
console.log(myMockOnce()); // "Normal return value on subsequent calls"
</pre></td></tr></tbody></table>
</div>
<p><br/></p><p>In this example, the <code>myMock</code> mock function is created using jest.fn().mockImplementation() with a function that throws an error. When the mock function is called, it will throw the specified error.</p><p><br/></p><p>The <code>myMockOnce</code> mock function is created using jest.fn().mockImplementationOnce(). The first time the mock function is called, it will throw an error. On subsequent calls, it will return the normal value specified by mockReturnValue().</p></div></div>  <div class="text-center text-lg-left text-md-left text-xl-left text-sm-left col-sm-5 col-md-4 col-lg-2 col-xl-2 col-12" data-v-145a8bfc data-v-145a8bfc><div class="like-dislike-buttons pt-3" data-v-0348114a data-v-145a8bfc><span class="v-badge v-badge--overlap theme--light" data-v-0348114a><span draggable="false" class="v-chip v-chip--outlined theme--light v-size--default info info--text" data-v-0348114a><span class="v-chip__content"><div class="d-flex justify-center" style="--primary-color:#FF6B00;" data-v-0348114a><a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-up theme--light" data-v-0348114a></i> <small title="no likes" class="like-dislike-buttons__count" data-v-0348114a>0</small></a> <span class="separator" data-v-0348114a>|</span> <a href="#" class="like-dislike-buttons__btn" data-v-0348114a><i aria-hidden="true" class="v-icon notranslate mdi mdi-thumb-down theme--light" data-v-0348114a></i> <small title="no dislikes" class="like-dislike-buttons__count" data-v-0348114a>0</small></a></div></span></span><span class="v-badge__wrapper"><span aria-atomic="true" aria-label="Badge" aria-live="polite" role="status" class="v-badge__badge error" style="bottom:calc(100% - 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Here is an example code snippet that demonstrates how you can make a PUT request using the Laravel HTTP client:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-y19ed3r\"\u003Euse IlluminateSupportFacadesHttp;\n\n$response = Http::put('http:\u002F\u002Fexample.com\u002Fapi\u002Fresource', [\n 'key' => 'value'\n]);\n\nif ($response->successful()) {\n \u002F\u002F Request was successful\n $responseData = $response->json();\n \u002F\u002F Do something with the response data\n} else {\n \u002F\u002F Request failed\n $errorCode = $response->status();\n \u002F\u002F Handle the error\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this code snippet:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EWe use the Http\u003C\u002Fstrong\u003E::put() method to send a PUT request to the specified URL (http:\u002F\u002Fexample.com\u002Fapi\u002Fresource) with the data payload ['key' => 'value'].\u003C\u002Fli\u003E\u003Cli\u003EWe then check if the request was successful by calling the successful() method on the response object.\u003C\u002Fli\u003E\u003Cli\u003EIf the request was successful, we can retrieve the response data using the json() method. You can then perform any further processing on the response data as needed.\u003C\u002Fli\u003E\u003Cli\u003EIf the request failed, we can retrieve the error code using the status() method and handle the error accordingly.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThat's how you can send a PUT request in Laravel using the Laravel HTTP client.\u003C\u002Fp\u003E",is_moderated:b,username:"mason",user_active:a,created:"2024-10-14T02:06:42Z"};aw.order=a;aw.description=v;aw.slug="php";ax.id=Y;ax.name=j;ax.messages=7853;ax.threads=3992;ax.meta_title=j;ax.meta_description=j;ax.children=e;ax.icon="category\u002F8bc6a538-1878-494b-a68f-d75c0788e762\u002Fjavascript-logo.png";ax.is_public=c;ax.last_post={id:252503,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ejimmie.mante\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E",is_moderated:b,username:"nikki_nikolaus",user_active:a,created:"2024-10-15T16:07:00Z"};ax.order=a;ax.description=j;ax.slug=am;ay.id=34529;ay.name=w;ay.messages=3440;ay.threads=2090;ay.meta_title=w;ay.meta_description=w;ay.children=e;ay.icon="category\u002Fc450d489-f776-42ad-a307-a876104daf91\u002Fsql.png";ay.is_public=c;ay.last_post={id:254900,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ewyman\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003ETo join a table with a result column in Oracle, you can use a subquery to generate the result column and then join it with the desired table. Here is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-1pnmc9b\" language=\"sql\"\u003ESELECT t1.column1, t1.column2, t2.result_column\nFROM table1 t1\nJOIN (SELECT column3 * 2 AS result_column FROM table2) t2\nON t1.column1 = t2.result_column;\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E",is_moderated:b,username:az,user_active:a,created:"2024-11-02T15:23:39Z"};ay.order=a;ay.description=w;ay.slug="sql";aA.id=34530;aA.name=x;aA.messages=1596;aA.threads=980;aA.meta_title=x;aA.meta_description=x;aA.children=e;aA.icon="category\u002F6a57ef72-267d-44d0-b16f-0f5992a25150\u002Fgo2.png";aA.is_public=c;aA.last_post={id:256275,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ekyla.kuvalis\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo parse YAML with a dynamic key in Golang, you can use the \u003Ccode\u003Egopkg.in\u002Fyaml.v2\u003C\u002Fcode\u003E package which provides functions to marshal and unmarshal YAML data.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere's an example code snippet to demonstrate how to parse YAML with a dynamic key in Golang:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-b7t6k39\"\u003Epackage main\n\nimport (\n\t"fmt"\n\t"gopkg.in\u002Fyaml.v2"\n\t"io\u002Fioutil"\n)\n\nfunc main() {\n\t\u002F\u002F Define a struct to unmarshal the YAML data into\n\tvar data map[interface{}]interface{}\n\n\t\u002F\u002F Read the YAML file\n\tyamlFile, err := ioutil.ReadFile("data.yaml")\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\n\t\u002F\u002F Unmarshal the YAML data into the struct\n\terr = yaml.Unmarshal(yamlFile, &data)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\n\t\u002F\u002F Access the dynamic key and its value\n\tdynamicKey := "key1" \u002F\u002F Assuming the dynamic key is "key1"\n\tvalue := data[dynamicKey]\n\tfmt.Println("Value of dynamic key:", value)\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this code snippet:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EWe define a map with interface{} keys and values to unmarshal the YAML data into, which allows for dynamic keys.\u003C\u002Fli\u003E\u003Cli\u003EWe read the YAML file using ioutil.ReadFile.\u003C\u002Fli\u003E\u003Cli\u003EWe unmarshal the YAML data into the map using yaml.Unmarshal.\u003C\u002Fli\u003E\u003Cli\u003EWe access the value of the dynamic key "key1" (you should replace this with your actual dynamic key).\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003E"data.yaml"\u003C\u002Fcode\u003E with the path to your YAML file.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EHope this helps! Let me know if you have any further questions.\u003C\u002Fp\u003E",is_moderated:b,username:"scotty",user_active:a,created:"2024-11-20T10:27:33Z"};aA.order=a;aA.description=x;aA.slug="golang";aB.id=34531;aB.name=y;aB.messages=1452;aB.threads=849;aB.meta_title=y;aB.meta_description=y;aB.children=e;aB.icon="category\u002Ff079ddf7-48d4-4aa3-b2b8-9bf568c958be\u002Fhtmlcss.png";aB.is_public=c;aB.last_post={id:236566,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Eeda.wolff\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo use custom fonts with Tailwind CSS and Nuxt.js, you can follow these steps:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EAdd your custom font files to your Nuxt.js project. You can do this by placing the font files in the assets\u002Ffonts directory of your Nuxt.js project.\n\u003C\u002Fli\u003E\u003Cli\u003ECreate a CSS file to import and configure your custom fonts. You can create a new CSS file (e.g., custom-fonts.css) in the assets\u002Fcss directory and add the following content:\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-we6a9fd\"\u003E@font-face {\n font-family: 'CustomFont';\n src: url('path\u002Fto\u002Fyour\u002Ffont-file.ttf') format('truetype');\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace \u003Ccode\u003E'CustomFont'\u003C\u002Fcode\u003E with the desired font family name and \u003Ccode\u003E'path\u002Fto\u002Fyour\u002Ffont-file.ttf'\u003C\u002Fcode\u003E with the path to your custom font file.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EImport the custom font CSS file in your nuxt.config.js file. Add the following code to your nuxt.config.js file to import the custom font CSS file:\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-bg4x26z\"\u003Ecss: [\n '@\u002Fassets\u002Fcss\u002Fcustom-fonts.css'\n],\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EUse the custom font in your Tailwind CSS styles. You can now use the custom font in your Tailwind CSS styles by specifying the font family in your HTML or Vue components. For example:\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-h7v9kzm\"\u003E<h1 class="font-CustomFont">Custom Font Title<\u002Fh1>\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace \u003Ccode\u003E'CustomFont'\u003C\u002Fcode\u003E with the font family name specified in your custom font CSS file.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EBuild and run your Nuxt.js project. Once you have completed the above steps, build and run your Nuxt.js project to see your custom font in action.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThat's it! You have successfully used custom fonts with Tailwind CSS and Nuxt.js.\u003C\u002Fp\u003E",is_moderated:b,username:"santina.kub",user_active:a,created:"2024-06-22T15:27:39Z"};aB.order=a;aB.description=y;aB.slug="html-css";aC.id=34532;aC.name=z;aC.messages=337;aC.threads=223;aC.meta_title=z;aC.meta_description=z;aC.children=e;aC.icon="category\u002F375757a5-d49a-485d-94fc-d28d725ae104\u002Fruby2.png";aC.is_public=c;aC.last_post={id:212726,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Egideon.hauck\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn addition to the code above, you can also use the \u003Ccode\u003Ecreate\u003C\u002Fcode\u003E method with a block to insert data into a database in a more concise way:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-97jubfb\"\u003EArticle.create do |article|\n article.title = "My Article Title"\n article.content = "My Article Content"\nend\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThis is especially useful when you want to perform additional actions or validations before saving the record.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can also use the \u003Ccode\u003Eimport\u003C\u002Fcode\u003E method to efficiently insert multiple records into the database at once. This method bypasses the lifecycle callbacks and validations, making it much faster than individual \u003Ccode\u003Ecreate\u003C\u002Fcode\u003E or \u003Ccode\u003Esave\u003C\u002Fcode\u003E operations. Here's an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-9rl85ye\"\u003Earticles = [\n { title: "Article 1", content: "Content 1" },\n { title: "Article 2", content: "Content 2" },\n { title: "Article 3", content: "Content 3" }\n]\n\nArticle.import(articles)\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThis will insert the specified records into the database without triggering validations or callbacks. However, keep in mind that the data directly goes into the database, so make sure it's properly sanitized and validated before using this method.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003ERemember to configure your database connection in config\u002Fdatabase.yml file before inserting data into the database.\u003C\u002Fp\u003E",is_moderated:b,username:az,user_active:a,created:"2024-02-12T11:22:34Z"};aC.order=a;aC.description=z;aC.slug="ruby";aD.id=34533;aD.name=A;aD.messages=4357;aD.threads=3399;aD.meta_title=A;aD.meta_description=A;aD.children=e;aD.icon="category\u002F1c348406-1653-4887-b583-7489de2310f3\u002Fpython.png";aD.is_public=c;aD.last_post={id:257285,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ealex.cummings\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can create a lower diagonal matrix in SymPy using the \u003Ccode\u003EMatrix\u003C\u002Fcode\u003E class and list comprehension. Here's an example code snippet demonstrating how to create a lower diagonal matrix:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-ccj2pi7\"\u003Efrom sympy import Matrix\n\n# Define the elements of the lower diagonal matrix\nelements = [1, 2, 3, 4]\n\n# Create a lower diagonal matrix with the specified elements\nlower_diagonal_matrix = Matrix([[0 if i >= j else elements[j-i-1] for j in range(len(elements))] for i in range(len(elements)])\n\nprint(lower_diagonal_matrix)\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this code snippet, we define the elements of the lower diagonal matrix in the \u003Ccode\u003Eelements\u003C\u002Fcode\u003E list. We then use list comprehension to create a matrix with the specified elements where the elements below the diagonal are equal to the corresponding elements in the \u003Ccode\u003Eelements\u003C\u002Fcode\u003E list.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can adjust the \u003Ccode\u003Eelements\u003C\u002Fcode\u003E list to create different lower diagonal matrices with different values.\u003C\u002Fp\u003E",is_moderated:b,username:"alfonzo",user_active:a,created:"2024-12-04T01:58:44Z"};aD.order=a;aD.description=A;aD.slug="python";aE.id=34534;aE.name=B;aE.messages=1952;aE.threads=1272;aE.meta_title=B;aE.meta_description=B;aE.children=e;aE.icon="category\u002F3f08ec78-9350-4d01-9395-77978dfce7e1\u002Fjava.png";aE.is_public=c;aE.last_post={id:253235,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Emadalyn\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EThe hibernate config file, typically named \u003Ccode\u003Ehibernate.cfg.xml\u003C\u002Fcode\u003E, should be placed in the root of your application's classpath. This means it can be placed in the \u003Ccode\u003Esrc\u002Fmain\u002Fresources\u003C\u002Fcode\u003E directory for Maven projects, or in the \u003Ccode\u003Esrc\u003C\u002Fcode\u003E directory for Eclipse projects. The Hibernate configuration file should be accessible to the application so that it can parse the configuration settings during startup.\u003C\u002Fp\u003E",is_moderated:b,username:"dewayne_green",user_active:a,created:"2024-10-21T22:12:47Z"};aE.order=a;aE.description=B;aE.slug="java";aF.id=34535;aF.name=C;aF.messages=1188;aF.threads=963;aF.meta_title=C;aF.meta_description=C;aF.children=e;aF.icon="category\u002F427d0e6e-1883-44dd-aa69-96672f1362e5\u002Fc.png";aF.is_public=c;aF.last_post={id:255647,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Edora\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E",is_moderated:b,username:"cameron.mccullough",user_active:a,created:"2024-11-11T14:14:53Z"};aF.order=a;aF.description=C;aF.slug="c-c";aG.id=34536;aG.name=D;aG.messages=663;aG.threads=531;aG.meta_title=D;aG.meta_description=D;aG.children=e;aG.icon="category\u002Fe1951c3a-5f15-4bff-b2a1-43f9148ea154\u002Fswift.png";aG.is_public=c;aG.last_post={id:237328,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ekarelle_heathcote\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003EThe @observable macro in Swift is used to define a property that will automatically trigger a change notification when its value is changed. This can be helpful when testing properties that are expected to change during the execution of your code.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo use the @observable macro in unit tests in Swift, you can define a property in your test class with the @Published attribute. Here's an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-i0tsabz\" language=\"swift\"\u003Eimport XCTest\nimport Combine\n\nclass MyTestClass: XCTestCase {\n\n @Published var myProperty: Int = 0\n\n func testPropertyChange() {\n let cancellable = myProperty.sink { value in\n \u002F\u002F Test the value of the property here\n }\n\n myProperty = 10\n\n \u002F\u002F Make sure to store the cancellable object somewhere to prevent it from being deallocated\n }\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E",is_moderated:b,username:"napoleon",user_active:a,created:"2024-06-24T18:02:39Z"};aG.order=a;aG.description=D;aG.slug="swift";aH.id=36177;aH.name=ac;aH.messages=19139;aH.threads=13445;aH.meta_title=aI;aH.meta_description=aI;aH.children=e;aH.icon="category\u002F25bf8071-d225-4b00-add3-5ce12dedc414\u002Fic-2dev.png";aH.is_public=c;aH.last_post={id:257309,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Elily.simonis\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo store PowerShell output to a variable, you can use the assignment operator "=" followed by the command whose output you want to store. Here's an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-z9hgr85\"\u003E$variable = Get-Date\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, the output of the Get-Date cmdlet is stored in the variable $variable. You can then use this variable to access the output later in your script.\u003C\u002Fp\u003E",is_moderated:b,username:"roel_stanton",user_active:a,created:"2024-12-04T08:45:47Z"};aH.order=a;aH.description=ac;aH.slug="other";return {layout:al,data:[{sanitizedMessage:i,thread:{id:90749,name:i,message:"\u003Cp\u003Ehow to mock exception in jest?\u003C\u002Fp\u003E",formatted_message:d,image:"thread\u002F2023\u002Ff0246946-66aa-4613-83e9-fdfc09ce8e6f.png",hash_tags:"[\"jest\",\"mock\"]",tags:["jest","mock","mywebforum"],category:{id:Y,name:j,messages:a,threads:a,meta_title:d,meta_description:d,children:e,icon:d,is_public:c,order:a,description:j,slug:am},category_id:Y,slug:Z,best_answer_id:an,likes:53,dislikes:a,is_closed:c,is_pinned:c,is_moderated:b,username:"cassandra",user_active:f,role:g,user_avatar:"avatar\u002Fcassandra\u002F313098749.jpg",created:"2022-12-27T04:01:54Z"},relatedThreads:[{id:86112,title:ao,text:ao,avatar:"avatar\u002Frollin\u002F230028675.jpg",role:g,slug:"how-to-mock-useeffect-in-jest",username:"rollin",created:"2022-11-14T22:59:00Z"},{id:90756,title:ap,text:ap,avatar:"avatar\u002Fsamara\u002Favatar_4619.jpg",role:g,slug:"how-to-mock-eventemitter-in-jest",username:"samara",created:"2022-12-27T04:12:12Z"},{id:90678,title:aq,text:aq,avatar:"avatar\u002Ftina\u002Favatar_0966.jpg",role:g,slug:"how-to-mock-foreach-in-jest",username:"tina",created:"2022-12-26T14:00:37Z"},{id:85680,title:ar,text:ar,avatar:"avatar\u002Fcasey\u002Fanimal0148.gif",role:g,slug:"how-to-mock-a-component-in-jest",username:"casey",created:"2022-11-11T04:28:58Z"},{id:90768,title:as,text:as,avatar:"avatar\u002Fewald\u002F3068.jpg",role:g,slug:"how-to-mock-lodash-in-jest",username:"ewald",created:"2022-12-27T04:31:20Z"}],socialSettings:{id:1876,size:a,facebook:b,vk:c,ok:c,linkedin:b,telegram:b,whatsapp:b,pocket:c,twitter:b,active:b},page:f,totals:f,postsTotal:_,posts:[{id:an,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ecassandra\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn Jest, you can use the \u003Ccode\u003Ejest.fn()\u003C\u002Fcode\u003E method to create a mock function, and then use the \u003Ccode\u003E.mockImplementation()\u003C\u002Fcode\u003E method to make the function throw an exception when it is called. Here is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-ociy977\" language=\"javascript\"\u003Econst myMock = jest.fn();\nmyMock.mockImplementation(() => {\n throw new Error('My error message');\n});\n\ntry {\n myMock();\n} catch (e) {\n console.log(e.message); \u002F\u002F "My error message"\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can also use \u003Ccode\u003Ejest.fn().mockImplementationOnce()\u003C\u002Fcode\u003E to only throw the exception on the first call, and then have the mock function return normally on subsequent calls.\u003C\u002Fp\u003E",formatted_message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ecassandra\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn Jest, you can use the \u003Ccode\u003Ejest.fn()\u003C\u002Fcode\u003E method to create a mock function, and then use the \u003Ccode\u003E.mockImplementation()\u003C\u002Fcode\u003E method to make the function throw an exception when it is called. Here is an example:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 3\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 4\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 5\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 6\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 7\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 8\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 9\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E10\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"color:#66d9ef\"\u003Econst\u003C\u002Fspan\u003E \u003Cspan style=\"color:#a6e22e\"\u003EmyMock\u003C\u002Fspan\u003E \u003Cspan style=\"color:#f92672\"\u003E=\u003C\u002Fspan\u003E \u003Cspan style=\"color:#a6e22e\"\u003Ejest\u003C\u002Fspan\u003E.\u003Cspan style=\"color:#a6e22e\"\u003Efn\u003C\u002Fspan\u003E();\n\u003Cspan style=\"color:#a6e22e\"\u003EmyMock\u003C\u002Fspan\u003E.\u003Cspan style=\"color:#a6e22e\"\u003EmockImplementation\u003C\u002Fspan\u003E(() => {\n \u003Cspan style=\"color:#66d9ef\"\u003Ethrow\u003C\u002Fspan\u003E \u003Cspan style=\"color:#66d9ef\"\u003Enew\u003C\u002Fspan\u003E Error(\u003Cspan style=\"color:#e6db74\"\u003E'My error message'\u003C\u002Fspan\u003E);\n});\n\n\u003Cspan style=\"color:#66d9ef\"\u003Etry\u003C\u002Fspan\u003E {\n \u003Cspan style=\"color:#a6e22e\"\u003EmyMock\u003C\u002Fspan\u003E();\n} \u003Cspan style=\"color:#66d9ef\"\u003Ecatch\u003C\u002Fspan\u003E (\u003Cspan style=\"color:#a6e22e\"\u003Ee\u003C\u002Fspan\u003E) {\n \u003Cspan style=\"color:#a6e22e\"\u003Econsole\u003C\u002Fspan\u003E.\u003Cspan style=\"color:#a6e22e\"\u003Elog\u003C\u002Fspan\u003E(\u003Cspan style=\"color:#a6e22e\"\u003Ee\u003C\u002Fspan\u003E.\u003Cspan style=\"color:#a6e22e\"\u003Emessage\u003C\u002Fspan\u003E); \u003Cspan style=\"color:#75715e\"\u003E\u002F\u002F "My error message"\n\u003C\u002Fspan\u003E\u003Cspan style=\"color:#75715e\"\u003E\u003C\u002Fspan\u003E}\n\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can also use \u003Ccode\u003Ejest.fn().mockImplementationOnce()\u003C\u002Fcode\u003E to only throw the exception on the first call, and then have the mock function return normally on subsequent calls.\u003C\u002Fp\u003E",is_moderated:b,likes:_,dislikes:a,thread_title:i,thread_slug:Z,username:"carey",user_avatar:"avatar\u002Fcarey\u002F2520.jpg",user_active:f,role:g,role_logo:d,created:"2023-01-17T23:03:04Z"},{id:204256,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ecassandra\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere's an example of using jest.fn().mockImplementation() and jest.fn().mockImplementationOnce() to mock an exception in Jest:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-o6jxbgk\"\u003E\u002F\u002F Mock function to throw an exception\nconst myMock = jest.fn().mockImplementation(() => {\n throw new Error('My error message');\n});\n\n\u002F\u002F Call the mock function and catch the exception\ntry {\n myMock();\n} catch (e) {\n console.log(e.message); \u002F\u002F "My error message"\n}\n\n\u002F\u002F Mock function to throw an exception only on the first call\nconst myMockOnce = jest\n .fn()\n .mockImplementationOnce(() => {\n throw new Error('My error message');\n })\n .mockReturnValue('Normal return value on subsequent calls');\n\n\u002F\u002F Call the mock function multiple times\ntry {\n myMockOnce(); \u002F\u002F Throws an exception\n} catch (e) {\n console.log(e.message); \u002F\u002F "My error message"\n}\n\nconsole.log(myMockOnce()); \u002F\u002F "Normal return value on subsequent calls"\nconsole.log(myMockOnce()); \u002F\u002F "Normal return value on subsequent calls"\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, the \u003Ccode\u003EmyMock\u003C\u002Fcode\u003E mock function is created using jest.fn().mockImplementation() with a function that throws an error. When the mock function is called, it will throw the specified error.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThe \u003Ccode\u003EmyMockOnce\u003C\u002Fcode\u003E mock function is created using jest.fn().mockImplementationOnce(). The first time the mock function is called, it will throw an error. On subsequent calls, it will return the normal value specified by mockReturnValue().\u003C\u002Fp\u003E",formatted_message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ecassandra\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere's an example of using jest.fn().mockImplementation() and jest.fn().mockImplementationOnce() to mock an exception in Jest:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 3\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 4\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 5\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 6\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 7\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 8\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E 9\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E10\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E11\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E12\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E13\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E14\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E15\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E16\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E17\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E18\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E19\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E20\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E21\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E22\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E23\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E24\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E25\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E26\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E27\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E28\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E29\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u002F\u002F Mock function to throw an exception\nconst myMock = jest.fn().mockImplementation(() => {\n throw new Error('My error message');\n});\n\n\u002F\u002F Call the mock function and catch the exception\ntry {\n myMock();\n} catch (e) {\n console.log(e.message); \u002F\u002F "My error message"\n}\n\n\u002F\u002F Mock function to throw an exception only on the first call\nconst myMockOnce = jest\n .fn()\n .mockImplementationOnce(() => {\n throw new Error('My error message');\n })\n .mockReturnValue('Normal return value on subsequent calls');\n\n\u002F\u002F Call the mock function multiple times\ntry {\n myMockOnce(); \u002F\u002F Throws an exception\n} catch (e) {\n console.log(e.message); \u002F\u002F "My error message"\n}\n\nconsole.log(myMockOnce()); \u002F\u002F "Normal return value on subsequent calls"\nconsole.log(myMockOnce()); \u002F\u002F "Normal return value on subsequent calls"\n\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, the \u003Ccode\u003EmyMock\u003C\u002Fcode\u003E mock function is created using jest.fn().mockImplementation() with a function that throws an error. When the mock function is called, it will throw the specified error.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EThe \u003Ccode\u003EmyMockOnce\u003C\u002Fcode\u003E mock function is created using jest.fn().mockImplementationOnce(). The first time the mock function is called, it will throw an error. On subsequent calls, it will return the normal value specified by mockReturnValue().\u003C\u002Fp\u003E",is_moderated:b,likes:a,dislikes:a,thread_title:i,thread_slug:Z,username:"trenton_kirlin",user_avatar:"avatar\u002Ftrenton_kirlin\u002F2200.jpg",user_active:f,role:g,role_logo:d,created:"2023-12-23T00:33:28Z"}]}],fetch:{},error:e,state:{loading:a,settings:{id:8542,name:k,domain:"devhubby.com",port:80,plan:f,plan_name:"free",footer_code:"\u003C!-- Global site tag (gtag.js) - Google Analytics --\u003E\n\u003Cscript async src=\"https:\u002F\u002Fwww.googletagmanager.com\u002Fgtag\u002Fjs?id=G-5LBS05BL1D\"\u003E\u003C\u002Fscript\u003E\n\u003Cscript\u003E\n window.dataLayer = window.dataLayer || [];\n function gtag(){dataLayer.push(arguments);}\n gtag('js', new Date());\n\n gtag('config', 'G-5LBS05BL1D');\n\u003C\u002Fscript\u003E\n\n\u003Cscript async src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js?client=ca-pub-4833888168110763\"\n crossorigin=\"anonymous\"\u003E\u003C\u002Fscript\u003E",robots_txt:"User-agent: *\nDisallow: \u002Fsearch\nDisallow: \u002Fadmin\nDisallow: \u002Fprofile\nDisallow: \u002Flogin\nDisallow: \u002Fregister\n\nSitemap: https:\u002F\u002Fdevhubby.com\u002Fsitemap.xml",locale:"en",add_source:a,allow_likes:f,add_watermark:f,add_watermark_position:3,hash:"c64c6733-bfad-4db8-b387-18207476d4d5",default_role:at,allow_hash_tags:f,add_source_text:d,scrollable_pagination:a,meta_title:k,blog_active:c,favicon_png:"\u002Ffavicon.png",favicon_ico:d,custom_css:".amzn-native-container {\n margin: 0 auto;\n}\n \n.forum-text.ql-viewer div{\n border-radius: 5px;\n}",meta_description:k,description:k,logo:"logo\u002Fdev.png",is_related_thread:f,related_thread:au,notify_on_moderation:b,activation:"email",facebook:"https:\u002F\u002Fwww.facebook.com\u002Fgroups\u002Fdevhubby",linkedin:"https:\u002F\u002Fwww.linkedin.com\u002Fgroups\u002F14086432\u002F",twitter:"https:\u002F\u002Ftwitter.com\u002Fdevhubbycom",youtube:"https:\u002F\u002Fdevhubby.tumblr.com\u002F",instagram:"https:\u002F\u002Fwww.instagram.com\u002Fdev_hubby\u002F"},layout:{id:8650,is_dark:a,name:al,background_full:c,code_theme:"monokai",page_transition:"fade",background:d,background_color:d,text_color:d,text_font_family:"Roboto",primary_color:$,secondary_color:u,accent_color:u,info_color:u,success_color:u,error_color:$,warning_color:$},social_providers:{google:b,facebook:b,github:b},menus:[],showAd:c,darkMode:c,isFooterVisible:c,cdnUrl:"https:\u002F\u002Fforum-static.fra1.cdn.digitaloceanspaces.com",metaOg:{title:i,url:"https:\u002F\u002Fdevhubby.com\u002Fthread\u002Fhow-to-mock-exception-in-jest",type:d,image:"https:\u002F\u002Fforum-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002Fc64c6733-bfad-4db8-b387-18207476d4d5\u002Fthread\u002F2023\u002Ff0246946-66aa-4613-83e9-fdfc09ce8e6f.png",description:i,site_name:k},itemsPerPage:15,ad:[{id:23,name:"Own domain footer",css_selector:d,position:_,one_time:c,show_every:a,code:"\u003Cdiv class=\"flex\"\u003E\n\u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FoJqr0c6SR\" target=\"_blank\"\u003E\u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fpromo\u002Fbanner.png\" style=\"max-height:200px; 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