add tests to verify content file structure

.circleci/config.yml

@@ -0,0 +1,87 @@
+version: 2.1
+
+orbs:
+  cypress: cypress-io/[email protected]
+
+references:
+  default_env: &default_env
+    docker:
+      - image: cypress/base:12.14.0
+    working_directory: ~/repo
+
+  repo_cache_key_1: &repo_cache_key_1 v1-cypress-repo-{{ arch}}-{{ .Branch }}-{{ .Revision }}
+  repo_cache_key_2: &repo_cache_key_2 v1-cypress-repo-{{ arch}}-{{ .Branch }}
+  repo_cache_key_3: &repo_cache_key_3 v1-cypress-repo-{{ arch}}
+
+  restore_repo: &restore_repo
+    restore_cache:
+      keys:
+        - *repo_cache_key_1
+        - *repo_cache_key_2
+        - *repo_cache_key_3
+
+jobs:
+  checkout_code:
+    <<: *default_env
+    steps:
+      - *restore_repo
+      - checkout
+      - run: npx [email protected] --production=false --frozen-lockfile
+      - save_cache:
+          key: *repo_cache_key_1
+          paths:
+            - .
+
+  verify_formatting:
+    <<: *default_env
+    steps:
+      - *restore_repo
+      - run:
+          name: Verify Prettier
+          command: yarn prettier:verify
+
+  verify_compile:
+    <<: *default_env
+    steps:
+      - *restore_repo
+      - run:
+          name: Verify Typescript
+          command: yarn compile
+
+  verify_lint:
+    <<: *default_env
+    steps:
+      - *restore_repo
+      - run:
+          name: Verify ESLint
+          command: yarn lint --format junit --output-file /tmp/test-results/eslint.xml
+      - store_test_results:
+          path: /tmp/test-results
+
+  tests:
+    <<: *default_env
+    parallelism: 4
+    resource_class: large
+    steps:
+      - *restore_repo
+      - run:
+          name: Run test suite
+          command: yarn test
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - checkout_code
+      - verify_compile:
+          requires:
+            - checkout_code
+      - verify_lint:
+          requires:
+            - checkout_code
+      - verify_formatting:
+          requires:
+            - checkout_code
+      - tests:
+          requires:
+            - checkout_code

.eslintrc.json

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+{
+  "extends": ["@codecademy/eslint-config"]
+}

.gitignore

@@ -1 +1,9 @@
 .DS_Store
+node_modules
+package-lock.json
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+*.swp
+*.swo
+tmp

.prettierignore

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+node_modules
+yarn.lock

.prettierrc.js

@@ -0,0 +1 @@
+module.exports = require('@codecademy/prettier-config');

content.test.ts

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+import fs from 'fs';
+import path from 'path';
+
+describe('Codecademy Docs Content', () => {
+  it('adheres to content file structure', () => {
+    // file names can only contain alphanumerics and hyphens
+    const validateName = (pathName: string, name: string) => {
+      const filteredName = name.replace(/[^A-Za-z0-9.-]/g, '');
+
+      // format so that test failures are more helpful
+      if (filteredName !== name) {
+        expect(`${pathName} - file name must only include alphanumerics or -`).toBe('');
+      }
+    };
+
+    // nodes can have n directories of children and at most one .md file with the same name as its parent directory
+    const checkNode = (nodePath: string) => {
+      const children = fs.readdirSync(nodePath);
+
+      children.forEach((child) => {
+        const childPath = path.join(nodePath, child);
+        validateName(childPath, child);
+
+        if (fs.statSync(childPath).isDirectory()) {
+          checkChild(childPath);
+        } else {
+          const nodeName = nodePath.split('/').slice(-1)[0];
+          expect(childPath).toBe(path.join(nodePath, `${nodeName}.md`));
+        }
+      });
+    };
+
+    // children can only be directories of nodes
+    const checkChild = (childPath: string) => {
+      const nodes = fs.readdirSync(childPath);
+
+      nodes.forEach((node) => {
+        const nodePath = path.join(childPath, node);
+        validateName(nodePath, node);
+
+        // format so that test failures are more helpful
+        if(!fs.statSync(nodePath).isDirectory()) {
+          expect(`${nodePath} - expected a directory but got a file`).toBe('');
+        }
+        checkNode(nodePath);
+      });
+    };
+
+    checkChild(path.join(__dirname, 'content'));
+  });
+});

jest.config.js

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+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  clearMocks: true,
+  testMatch: ['**/*test.ts'],
+  testPathIgnorePatterns: ['<rootDir>/[/\\\\]node_modules[/\\\\]'],
+};

package.json

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+{
+  "name": "CodecademyDocs",
+  "devDependencies": {
+    "@codecademy/eslint-config": "5.0.0",
+    "@codecademy/prettier-config": "^0.1.10",
+    "@codecademy/tsconfig": "^0.2.0",
+    "@types/jest": "^26.0.24",
+    "@types/node": "^16.4.3",
+    "eslint": "^7.25.0",
+    "jest": "^27.0.6",
+    "prettier": "^2.2.1",
+    "ts-jest": "^27.0.4",
+    "typescript": "^4.2.4"
+  },
+  "scripts": {
+    "compile": "tsc --noEmit",
+    "format": "prettier --ignore-path .prettierignore --write",
+    "format:verify": "prettier \"./**.ts\" --list-different",
+    "lint": "eslint \"./**.ts\" --max-warnings 0",
+    "test": "jest"
+  },
+  "version": "1.0.0"
+}

tsconfig.json

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+{
+  "extends": "@codecademy/tsconfig",
+  "compilerOptions": {
+    "allowJs": true,
+    "baseUrl": ".",
+    "isolatedModules": true,
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "noEmit": true,
+    "noImplicitReturns": true,
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "resolveJsonModule": true
+  },
+  "exclude": ["node_modules"],
+  "include": ["**/*.ts"]
+}