25:["$","title",null,{"children":"Test Utils | Justin Bennett | Observable"}] 4c:T87b,tests = (fn, specs) => { let output = html`

`; for (const test of specs) { const [name, given, expected, format] = test; let received; try { received = typeof format === "function" ? format(fn, given) : fn(given); } catch (e) { received = e; } if (_.isEqual(expected, received)) { // pass output.append(html`

✅ ${_.capitalize(name)}

  Given 

${JSON.stringify(given, null, 2)
          .split('\n')
          .map(line => `  ${line}`)
          .join(
            '
'
          )}

  Received 

${JSON.stringify(received, null, 2)
        .split('\n')
        .map(line => `  ${line}`)
        .join('
')}

`); } else { // fail output.append(html`

❌ ${_.capitalize(name)}

  Given 

${JSON.stringify(given, null, 2)
        .split('\n')
        .map(line => `  ${line}`)
        .join(
          '
'
        )}

${diff.default(
        expected,
        received,
        {
          aColor: text => `${text}`,
          bColor: text => `${text}`,
          commonColor: _.identity
        }
      )}${(typeof expected !== typeof received &&
        `

  ${JSON.stringify(
          received,
          null,
          2
        )}`) ||
        ''}

`); } } return output; }4d:[] 48:{"id":"29398e625fce9b29","slug":"test-utils","title":"Test Utils","thumbnail":"31fa6d8631c69cfcd930188ec67e44536d57416ed7c6151cbf9e2085d6f8bfd2","access_level":"public","create_time":"$D2021-02-08T04:06:36.043Z","update_time":"$D2021-03-04T08:33:52.996Z","view_time":null,"first_public_time":"$D2021-02-08T04:42:38.070Z","has_unpublished_edits":null,"fork":false,"stars":3,"starred":false,"owner":{"type":"team","id":"e909667a62744d28","login":"zephraph","name":"Justin Bennett","avatar_url":"https://avatars-next.observableusercontent.com/11cdfb2f17ba76d480852e2e2e75a8a96dd96b9ec2c577c7a60f8903721d1bf9","tier":"starter_2024","bio":"Hey friends! I'm a fullstack engineering based out of Brooklyn, New York. I'm really interested in programming as a communication medium, tools for thought, and building more humane software. ","followed_by_you":false,"follows_you":false},"version":357,"publish_version":357,"role":null,"authored":false,"authors":[{"type":"individual","id":"b87a98b6c7b871c4","login":"zephraph","name":"Justin Bennett","avatar_url":"https://avatars-next.observableusercontent.com/11cdfb2f17ba76d480852e2e2e75a8a96dd96b9ec2c577c7a60f8903721d1bf9","tier":null,"bio":"Hey friends! I'm a fullstack engineering based out of Brooklyn, New York. I'm really interested in programming as a communication medium, tools for thought, and building more humane software. ","followed_by_you":false,"follows_you":false}],"members":[{"type":"individual","id":"b87a98b6c7b871c4","login":"zephraph","name":"Justin Bennett","avatar_url":"https://avatars-next.observableusercontent.com/11cdfb2f17ba76d480852e2e2e75a8a96dd96b9ec2c577c7a60f8903721d1bf9","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Test Utils","cells":[{"id":0,"value":"md`# Test Utils\n\nA collection of functions to make testing in a notebook easier.`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":69,"value":"_ = require(\"lodash\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":200,"value":"diff = require(\"https://bundle.run/jest-diff@26.6.2\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":309,"value":"catchException = fn => {\n try {\n fn();\n } catch (e) {\n return e;\n }\n throw new Error('No exception triggered!');\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":4,"value":"md`## Basic Assertions`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":126,"value":"md`### tests\n\nA function that runs a series of tests on a given function.\n\nIt takes two arguments:\n\n- \\`fn\\` － the function under test\n- \\`specs\\` － an array of tuples, each of which represents a test case\n 1. \\`name\\` － A string description of the test case\n 2. \\`given\\` － The value to be passed to the function under test\n 3. \\`expected\\` － The value to check against what's returned from the function under test\n 4. \\`format\\` _(optional)_ － A function that takes \\`fn\\` and \\`given\\` that's called in place of \\`fn\\`\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":133,"value":"$4c","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":158,"value":"tests(a => \"testing\", [\n [\"string fail\", \"test\", \"test\"],\n [\"string pass\", \"testing\", \"testing\"],\n [\"different type fail\", \"test\", { fail: true }]\n])","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W4d","stdlib":"1"}} 24:null