{ "data": { "question": { "questionId": "2813", "questionFrontendId": "2704", "boundTopicId": null, "title": "To Be Or Not To Be", "titleSlug": "to-be-or-not-to-be", "content": "<p>Write a function <code>expect</code> that helps developers test their code. It should take in any value <code>val</code> and return an object with the following two functions.</p>\n\n<ul>\n\t<li><code>toBe(val)</code> accepts another value and returns <code>true</code> if the two values <code>===</code> each other. If they are not equal, it should throw an error <code>"Not Equal"</code>.</li>\n\t<li><code>notToBe(val)</code> accepts another value and returns <code>true</code> if the two values <code>!==</code> each other. If they are equal, it should throw an error <code>"Equal"</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () => expect(5).toBe(5)\n<strong>Output:</strong> {"value": true}\n<strong>Explanation:</strong> 5 === 5 so this expression returns true.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () => expect(5).toBe(null)\n<strong>Output:</strong> {"error": "Not Equal"}\n<strong>Explanation:</strong> 5 !== null so this expression throw the error "Not Equal".\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () => expect(5).notToBe(null)\n<strong>Output:</strong> {"value": true}\n<strong>Explanation:</strong> 5 !== null so this expression returns true.\n</pre>\n", "translatedTitle": null, "translatedContent": null, "isPaidOnly": false, "difficulty": "Easy", "likes": 423, "dislikes": 89, "isLiked": null, "similarQuestions": "[]", "exampleTestcases": "() => expect(5).toBe(5)\n() => expect(5).toBe(null)\n() => expect(5).notToBe(null)", "categoryTitle": "JavaScript", "contributors": [], "topicTags": [], "companyTagStats": null, "codeSnippets": [ { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {string} val\n * @return {Object}\n */\nvar expect = function(val) {\n \n};\n\n/**\n * expect(5).toBe(5); // true\n * expect(5).notToBe(5); // throws \"Equal\"\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "type ToBeOrNotToBe = {\n toBe: (val: any) => boolean;\n notToBe: (val: any) => boolean;\n};\n\nfunction expect(val: any): ToBeOrNotToBe {\n\t\n};\n\n/**\n * expect(5).toBe(5); // true\n * expect(5).notToBe(5); // throws \"Equal\"\n */", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"72.1K\", \"totalSubmission\": \"117.5K\", \"totalAcceptedRaw\": 72079, \"totalSubmissionRaw\": 117515, \"acRate\": \"61.3%\"}", "hints": [], "solution": { "id": "1962", "canSeeDetail": false, "paidOnly": true, "hasVideoSolution": false, "paidOnlyVideo": true, "__typename": "ArticleNode" }, "status": null, "sampleTestCase": "() => expect(5).toBe(5)", "metaData": "{\n \"name\": \"expect\",\n \"params\": [\n {\n \"name\": \"func\",\n \"type\": \"string\"\n }\n ],\n \"return\": {\n \"type\": \"integer\"\n },\n \"manual\": true,\n \"languages\": [\n \"javascript\",\n \"typescript\"\n ]\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "enableTestMode": false, "enableDebugger": false, "envInfo": "{\"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use 5.3.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/tree/fb4fdb984834421279aeb081df7af624d17c2a03\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.1 version of <a href=\\\"https://github.com/datastructures-js/queue/tree/e63563025a5a805aa16928cb53bcd517bfea9230\\\" target=\\\"_blank\\\">datastructures-js/queue</a>.</p>\"], \"typescript\": [\"Typescript\", \"<p><code>TypeScript 5.1.6, Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES2022 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\"]}", "libraryUrl": null, "adminUrl": null, "challengeQuestion": null, "__typename": "QuestionNode" } } }