feat(challenge-md): Parse seed files from md

tools/challenge-md-parser/__snapshots__/challengeSeed-to-data.test.js.snap

@@ -0,0 +1,23 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`challengeSeed-to-data plugin should have an output to match the snapshot 1`] = `
+Object {
+  "files": Array [
+    Object {
+      "contents": "function testFunction(arg) {
+  return arg;
+}
+
+testFunction('hello');
+",
+      "ext": "js",
+      "head": "console.log('before the test');
+",
+      "key": "indexjs",
+      "name": "index",
+      "tail": "console.info('after the test');
+",
+    },
+  ],
+}
+`;

tools/challenge-md-parser/challengeSeed-to-data.js

@@ -0,0 +1,72 @@
+const visit = require('unist-util-visit');
+const { selectAll, select } = require('hast-util-select');
+
+const { sectionFilter } = require('./utils');
+
+const seedRE = /(.+)-seed$/;
+const headRE = /(.+)-setup$/;
+const tailRE = /(.+)-teardown$/;
+
+function defaultFile(lang) {
+  return {
+    key: `index${lang}`,
+    ext: lang,
+    name: 'index',
+    contents: '',
+    head: '',
+    tail: ''
+  };
+}
+function createCodeGetter(key, regEx, seeds) {
+  return container => {
+    const {
+      properties: { id }
+    } = container;
+    const lang = id.match(regEx)[1];
+    const code = select('code', container).children[0].value;
+    if (lang in seeds) {
+      seeds[lang] = {
+        ...seeds[lang],
+        [key]: code
+      };
+    } else {
+      seeds[lang] = {
+        ...defaultFile(lang),
+        [key]: code
+      };
+    }
+  };
+}
+
+function createPlugin() {
+  return function transformer(tree, file) {
+    function visitor(node) {
+      if (sectionFilter(node, 'challengeSeed')) {
+        let seeds = {};
+        const codeDivs = selectAll('div', node);
+        const seedConatiners = codeDivs.filter(({ properties: { id } }) =>
+          seedRE.test(id)
+        );
+        seedConatiners.forEach(createCodeGetter('contents', seedRE, seeds));
+
+        const headConatiners = codeDivs.filter(({ properties: { id } }) =>
+          headRE.test(id)
+        );
+        headConatiners.forEach(createCodeGetter('head', headRE, seeds));
+
+        const tailConatiners = codeDivs.filter(({ properties: { id } }) =>
+          tailRE.test(id)
+        );
+        tailConatiners.forEach(createCodeGetter('tail', tailRE, seeds));
+
+        file.data = {
+          ...file.data,
+          files: Object.keys(seeds).map(lang => seeds[lang])
+        };
+      }
+    }
+    visit(tree, 'element', visitor);
+  };
+}
+
+module.exports = createPlugin;

tools/challenge-md-parser/challengeSeed-to-data.test.js

@@ -0,0 +1,59 @@
+/* global describe it expect beforeEach */
+const mockAST = require('./fixtures/challenge-html-ast.json');
+const challengeSeedToData = require('./challengeSeed-to-data');
+
+describe('challengeSeed-to-data plugin', () => {
+  const plugin = challengeSeedToData();
+  let file = { data: {} };
+
+  beforeEach(() => {
+    file = { data: {} };
+  });
+
+  it('returns a function', () => {
+    expect(typeof plugin).toEqual('function');
+  });
+
+  it('adds a `files` property to `file.data`', () => {
+    plugin(mockAST, file);
+    expect('files' in file.data).toBe(true);
+  });
+
+  it('ensures that the `files` property is an array', () => {
+    plugin(mockAST, file);
+    expect(Array.isArray(file.data.files)).toBe(true);
+  });
+
+  it('adds test objects to the files array following a schema', () => {
+    expect.assertions(7);
+    plugin(mockAST, file);
+    const {
+      data: { files }
+    } = file;
+    const testObject = files[0];
+    expect(Object.keys(testObject).length).toEqual(6);
+    expect(testObject).toHaveProperty('key');
+    expect(testObject).toHaveProperty('ext');
+    expect(testObject).toHaveProperty('name');
+    expect(testObject).toHaveProperty('contents');
+    expect(testObject).toHaveProperty('head');
+    expect(testObject).toHaveProperty('tail');
+  });
+
+  it('only adds strings to the `files` object type', () => {
+    expect.assertions(6);
+    plugin(mockAST, file);
+    const {
+      data: { files }
+    } = file;
+    const testObject = files[0];
+    Object.keys(testObject)
+      .map(key => testObject[key])
+      .forEach(value => expect(typeof value).toEqual('string'));
+  });
+
+  it('should have an output to match the snapshot', () => {
+    plugin(mockAST, file);
+    expect(file.data).toMatchSnapshot();
+  });
+});

tools/challenge-md-parser/index.js

@@ -10,6 +10,7 @@ const raw = require('rehype-raw');
 const frontmatterToData = require('./frontmatter-to-data');
 const textToData = require('./text-to-data');
 const testsToData = require('./tests-to-data');
+const challengeSeedToData = require('./challengeSeed-to-data');
 
 const processor = unified()
   .use(markdown)
@@ -19,6 +20,7 @@ const processor = unified()
   .use(remark2rehype, { allowDangerousHTML: true })
   .use(raw)
   .use(textToData, ['description', 'instructions'])
+  .use(challengeSeedToData)
   // the plugins below are just to stop the processor from throwing
   // we need to write a compiler that can create graphql nodes
   .use(html);

tools/challenge-md-parser/package-lock.json

@@ -821,6 +821,11 @@
         }
       }
     },
+    "bcp-47-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/bcp-47-match/-/bcp-47-match-1.0.0.tgz",
+      "integrity": "sha512-6rzWe2U70JHrYfBqBnhoeV7HykhmCQ6X2RrBcbpkyCwtNpkGadr3m3LF8ZLXpQ7qrsLCOm3eis2lsVemkLsvHg=="
+    },
     "bcrypt-pbkdf": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
@@ -831,6 +836,11 @@
         "tweetnacl": "0.14.5"
       }
     },
+    "boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1156,6 +1166,11 @@
         }
       }
     },
+    "css-selector-parser": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/css-selector-parser/-/css-selector-parser-1.3.0.tgz",
+      "integrity": "sha1-XxrUPi2O77/cME/NOaUhZklD4+s="
+    },
     "cssom": {
       "version": "0.3.4",
       "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.4.tgz",
@@ -1330,6 +1345,11 @@
       "integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==",
       "dev": true
     },
+    "direction": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/direction/-/direction-1.0.2.tgz",
+      "integrity": "sha512-hSKoz5FBn+zhP9vWKkVQaaxnRDg3/MoPdcg2au54HIUDR8MrP8Ah1jXSJwCXel6SV3Afh5DSzc8Uqv2r1UoQwQ=="
+    },
     "domexception": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/domexception/-/domexception-1.0.1.tgz",
@@ -2424,6 +2444,11 @@
         "xtend": "4.0.1"
       }
     },
+    "hast-util-has-property": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/hast-util-has-property/-/hast-util-has-property-1.0.1.tgz",
+      "integrity": "sha512-DUck5lp8ku3o8n9GIA1Nghdz8UQyis2/b/ro0O4z5HP/y82uzZL6CXehuQmY5re+rLgTP4MVF/YpYDj9YqD0wA=="
+    },
     "hast-util-is-element": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/hast-util-is-element/-/hast-util-is-element-1.0.1.tgz",
@@ -2456,6 +2481,27 @@
         }
       }
     },
+    "hast-util-select": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/hast-util-select/-/hast-util-select-2.1.0.tgz",
+      "integrity": "sha512-wPnaITEMGvTvzA9GUQhj7qyOVLceQfxol3Zj+2BrhuMQNt7/W1Za76ZDspNeRKAZmT4aFikNa2SwuJ7MaQC6LQ==",
+      "requires": {
+        "bcp-47-match": "1.0.0",
+        "comma-separated-tokens": "1.0.5",
+        "css-selector-parser": "1.3.0",
+        "direction": "1.0.2",
+        "hast-util-has-property": "1.0.1",
+        "hast-util-is-element": "1.0.1",
+        "hast-util-to-string": "1.0.1",
+        "hast-util-whitespace": "1.0.1",
+        "not": "0.1.0",
+        "nth-check": "1.0.1",
+        "property-information": "4.2.0",
+        "space-separated-tokens": "1.1.2",
+        "unist-util-visit": "1.4.0",
+        "zwitch": "1.0.3"
+      }
+    },
     "hast-util-to-html": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/hast-util-to-html/-/hast-util-to-html-4.0.1.tgz",
@@ -2485,6 +2531,11 @@
         "zwitch": "1.0.3"
       }
     },
+    "hast-util-to-string": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/hast-util-to-string/-/hast-util-to-string-1.0.1.tgz",
+      "integrity": "sha512-EC6awGe0ZMUNYmS2hMVaKZxvjVtQA4RhXjtgE20AxGG49MM7OUUfaHc6VcVYv2YwzNlrZQGe5teimCxW1Rk+fA=="
+    },
     "hast-util-whitespace": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/hast-util-whitespace/-/hast-util-whitespace-1.0.1.tgz",
@@ -3923,6 +3974,11 @@
         "remove-trailing-separator": "1.1.0"
       }
     },
+    "not": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/not/-/not-0.1.0.tgz",
+      "integrity": "sha1-yWkcF0bFXc++VMvYvU/wQbwrUZ0="
+    },
     "npm-run-path": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-2.0.2.tgz",
@@ -3932,6 +3988,14 @@
         "path-key": "2.0.1"
       }
     },
+    "nth-check": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-1.0.1.tgz",
+      "integrity": "sha1-mSms32KPwsQQmN6rgqxYDPFJquQ=",
+      "requires": {
+        "boolbase": "1.0.0"
+      }
+    },
     "number-is-nan": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",

tools/challenge-md-parser/package.json

@@ -13,6 +13,7 @@
     "jest": "^23.6.0"
   },
   "dependencies": {
+    "hast-util-select": "^2.1.0",
     "hast-util-to-html": "^4.0.1",
     "js-yaml": "^3.12.0",
     "lodash": "^4.17.11",

tools/challenge-md-parser/text-to-data.js

@@ -1,12 +1,7 @@
 const visit = require('unist-util-visit');
 const toHTML = require('hast-util-to-html');
 
-const sectionFilter = (
+const { sectionFilter } = require('./utils')
-  { type, tagName, properties: { id = '' } },
-  sectionId
-) => {
-  return type === 'element' && tagName === 'section' && id === sectionId;
-};
 
 function textToData(sectionIds) {
   if (!sectionIds || !Array.isArray(sectionIds) || sectionIds.length <= 0) {

tools/challenge-md-parser/utils/index.js

@@ -0,0 +1,6 @@
+exports.sectionFilter = (
+  { type, tagName, properties: { id = '' } },
+  sectionId
+) => {
+  return type === 'element' && tagName === 'section' && id === sectionId;
+};