feat(Codebytes): add tests for codebytes package disc 399

.circleci/config.yml

@@ -102,6 +102,7 @@ jobs:
       - *set_npm_token
       - *restore_yarn_cache
       - run: yarn --production=false --frozen-lockfile
+      - run: yarn run install:sibling-dependencies
       - *save_yarn_cache
       - *save_node_modules
 

jest.config.base.js

@@ -17,6 +17,11 @@ module.exports = (packageName) => ({
   snapshotSerializers: ['enzyme-to-json/serializer'],
   moduleDirectories: ['node_modules'],
   collectCoverageFrom: ['<rootDir>/**/*.{js,jsx,ts,tsx}'],
+  moduleNameMapper: {
+    '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
+      '<rootDir>/../../script/jest/fileMock',
+    '\\.(css|scss)$': '<rootDir>/../../script/jest/styleMock',
+  },
   coveragePathIgnorePatterns: [
     '/node_modules/',
     '/stories/',

package.json

@@ -23,6 +23,7 @@
     "build-all": "lerna run lernaBuildTask",
     "build-changed": "lerna run lernaBuildTask --since --include-dependencies",
     "start:storybook": "cd ./packages/styleguide && yarn start",
+    "install:sibling-dependencies": "cd ./packages/codebytes && yarn --focus",
     "start": "yarn && yarn start:storybook"
   },
   "lint-staged": {

packages/codebytes/jest.config.js

@@ -0,0 +1 @@
+module.exports = require('../../jest.config.base')('codebytes');

packages/codebytes/package.json

@@ -29,7 +29,10 @@
     "@emotion/styled": "^11.3.0",
     "@monaco-editor/react": "4.3.1",
     "monaco-editor": ">= 0.25.0 < 1",
-    "react-resize-observer": "1.1.1"
+    "react-resize-observer": "1.1.1",
+    "js-base64": "^3.6.0",
+    "jsuri": "^1.3.1",
+    "@codecademy/tracking": "0.18.0"
   },
   "scripts": {
     "verify": "tsc --noEmit",
@@ -44,7 +47,12 @@
     "@emotion/jest": "^11.3.0",
     "@testing-library/dom": "^7.31.2",
     "@testing-library/react": "^11.0.4",
-    "@types/loadable__component": "^5.13.2"
+    "@types/loadable__component": "^5.13.2",
+    "@types/jsuri": "^1.3.30",
+    "@testing-library/react-hooks": "3.2.1",
+    "@testing-library/user-event": "13.1.1",
+    "monaco-editor-webpack-plugin": "1.9.1",
+    "@codecademy/gamut-tests": "*"
   },
   "publishConfig": {
     "access": "public"

packages/codebytes/src/__tests__/codebyte-test.tsx

@@ -0,0 +1,197 @@
+import './mocks';
+
+import { setupRtl } from '@codecademy/gamut-tests';
+import userEvent from '@testing-library/user-event';
+import { encode } from 'js-base64';
+import React from 'react';
+
+import { CodeByteEditor } from '..';
+import { helloWorld, validLanguages } from '../consts';
+import { trackClick } from '../helpers';
+import { trackUserImpression } from '../libs/eventTracking';
+import { CodeByteEditorProps } from '../types';
+
+const mockEditorTestId = 'mock-editor-test-id';
+
+// This is a super simplified mock capable of render value and trigger onChange.
+jest.mock('../MonacoEditor', () => ({
+  SimpleMonacoEditor: ({
+    value,
+    onChange,
+  }: {
+    value: string;
+    onChange?: (value: string) => void;
+  }) => (
+    <>
+      {value}
+      <input
+        data-testid={mockEditorTestId}
+        type="text"
+        onChange={(e) => {
+          onChange?.(e.target.value);
+        }}
+        value={value}
+      />
+    </>
+  ),
+}));
+
+const renderWrapper = setupRtl(CodeByteEditor, {});
+
+type RenderWrapperWithProps = CodeByteEditorProps & { mode?: string };
+
+const renderWrapperWith = ({ mode, ...rest }: RenderWrapperWithProps) => {
+  const url = new URL(window.location.href);
+
+  const { text, language } = rest;
+  if (text) {
+    url.searchParams.set('text', encode(text));
+  }
+  if (language) {
+    url.searchParams.set('lang', language);
+  }
+  url.searchParams.set('client-name', 'forum');
+  url.searchParams.set(
+    'page',
+    'https://discuss.codecademy.com/some-interesting/post'
+  );
+  if (mode) {
+    url.searchParams.set('mode', mode);
+  }
+  window.history.replaceState({}, '', url.toString());
+
+  return renderWrapper(rest);
+};
+
+describe('CodeBytes', () => {
+  const initialUrl = window.location.href;
+
+  afterEach(() => {
+    window.history.replaceState(null, '', initialUrl);
+    (trackClick as any).mockReset();
+    (trackUserImpression as any).mockReset();
+  });
+
+  it('has a language-specific "hello world" program defined for each language', () => {
+    validLanguages.forEach((language) => {
+      expect(helloWorld[language]).toBeDefined();
+    });
+  });
+
+  it('initializes with a language-specific "hello world" program when there is no language prop', () => {
+    const { view } = renderWrapper();
+    const selectedLanguage = view.getByRole('combobox') as Element;
+    userEvent.selectOptions(selectedLanguage, ['javascript']);
+    view.getByText(helloWorld.javascript);
+  });
+
+  it('initializes with a language-specific "hello world" program when there is a language prop but no text prop', () => {
+    const { view } = renderWrapper({ language: 'javascript' });
+    view.getByText(helloWorld.javascript);
+  });
+
+  it('initializes with deserialized text when there is a text prop but no language prop', () => {
+    const testString = 'yes hello';
+    const { view } = renderWrapper({ text: testString });
+    const selectedLanguage = view.getByRole('combobox') as Element;
+    userEvent.selectOptions(selectedLanguage, ['javascript']);
+    view.getByText(testString);
+  });
+
+  it('initializes with deserialized text when there is both a language and text prop', () => {
+    const testString = 'yes hello';
+    const { view } = renderWrapper({
+      text: testString,
+      language: 'javascript',
+    });
+    view.getByText(testString);
+  });
+
+  describe('Change Handlers', () => {
+    it('triggers onEdit on text edit', () => {
+      const onEdit = jest.fn();
+      const { view } = renderWrapper({
+        text: '',
+        language: 'javascript',
+        onEdit,
+      });
+
+      const editor = view.getByTestId(mockEditorTestId);
+      userEvent.type(editor, 'dog');
+
+      expect(onEdit).toHaveBeenCalledTimes(3);
+      expect(onEdit).toHaveBeenLastCalledWith('dog', 'javascript');
+    });
+
+    it('triggers onLanguageChange on language selection', () => {
+      const onLanguageChange = jest.fn();
+      const { view } = renderWrapper({
+        onLanguageChange,
+      });
+
+      const selectedLanguage = view.getByRole('combobox') as Element;
+      userEvent.selectOptions(selectedLanguage, ['javascript']);
+
+      expect(onLanguageChange).toHaveBeenCalledWith(
+        "console.log('Hello world!');",
+        'javascript'
+      );
+    });
+  });
+
+  describe('Tracking', () => {
+    it('triggers trackClick on clicking the logo', () => {
+      const { view } = renderWrapper({});
+      const logo = view.getByLabelText('visit codecademy.com');
+      userEvent.click(logo);
+      expect(trackClick).toHaveBeenCalledWith('logo');
+    });
+
+    it('triggers trackClick on language selection', () => {
+      const { view } = renderWrapper();
+      const selectedLanguage = view.getByRole('combobox') as Element;
+      userEvent.selectOptions(selectedLanguage, ['javascript']);
+      expect(trackClick).toHaveBeenCalledWith('lang_select');
+    });
+
+    it('triggers trackClick for the first edit in view mode', () => {
+      const testString = 'original-value';
+      const { view } = renderWrapper({
+        text: testString,
+        language: 'javascript',
+      });
+
+      const editor = view.getByTestId(mockEditorTestId);
+      userEvent.type(editor, 'd');
+
+      expect(trackClick).toHaveBeenCalledWith('edit');
+    });
+
+    it('triggers trackUserImpression for view mode', () => {
+      renderWrapperWith({
+        text: 'some-value',
+        language: 'javascript',
+      });
+
+      expect(trackUserImpression).toHaveBeenCalledWith({
+        page_name: 'forum',
+        context: 'https://discuss.codecademy.com/some-interesting/post',
+        target: 'codebyte',
+      });
+    });
+
+    it('triggers trackUserImpression for compose mode', () => {
+      renderWrapperWith({
+        text: 'some-value',
+        language: 'javascript',
+        mode: 'compose',
+      });
+
+      expect(trackUserImpression).toHaveBeenCalledWith({
+        page_name: 'forum_compose',
+        context: 'https://discuss.codecademy.com/some-interesting/post',
+        target: 'codebyte',
+      });
+    });
+  });
+});

packages/codebytes/src/__tests__/editor-test.tsx

@@ -0,0 +1,113 @@
+import './mocks';
+
+import { setupRtl } from '@codecademy/gamut-tests';
+import { act } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import React from 'react';
+
+import { Editor } from '../editor';
+import { trackClick } from '../helpers';
+
+jest.mock('../MonacoEditor', () => ({
+  SimpleMonacoEditor: ({ value }: { value: string }) => <>{value}</>,
+}));
+
+const renderWrapper = setupRtl(Editor, {
+  hideCopyButton: false,
+  language: 'javascript',
+  text: 'hello world',
+  onChange: jest.fn(),
+  snippetsBaseUrl: '',
+});
+
+Object.defineProperty(navigator, 'clipboard', {
+  value: {
+    writeText: jest.fn().mockImplementation(() => Promise.resolve()),
+  },
+});
+
+describe('Editor', () => {
+  (global as any).fetch = jest.fn();
+  afterEach(() => {
+    (global as any).fetch.mockClear();
+  });
+
+  it('shows a prompt tooltip when the CodeByte has __not__ been copied via the button', () => {
+    const { view } = renderWrapper();
+    expect(view.queryByTestId('copy-confirmation-tooltip')).toBeFalsy();
+    view.getByTestId('copy-prompt-tooltip');
+  });
+
+  it('shows a confirmation tooltip when the CodeByte has been copied via the button', () => {
+    const { view } = renderWrapper();
+    const copyBtn = view.getByTestId('copy-codebyte-btn');
+    userEvent.click(copyBtn as HTMLButtonElement);
+    expect(view.queryByTestId('copy-prompt-tooltip')).toBeFalsy();
+    view.getByTestId('copy-confirmation-tooltip');
+  });
+
+  it('hides the copy codebyte button if hideCopyButton prop is true"', () => {
+    const { view } = renderWrapper({
+      hideCopyButton: true,
+    });
+    expect(view.queryByTestId('copy-codebyte-btn')).toBeNull();
+  });
+
+  it('shows the copy codebyte button if hideCopyButton prop is not set', () => {
+    const { view } = renderWrapper();
+
+    view.getByTestId('copy-codebyte-btn');
+  });
+
+  describe('Change Handlers', () => {
+    it('triggers onCopy upon clicking the copy button', () => {
+      const onCopy = jest.fn();
+      const { view } = renderWrapper({
+        onCopy,
+      });
+
+      const copyButton = view.getByTestId('copy-codebyte-btn');
+      userEvent.click(copyButton);
+
+      expect(onCopy).toHaveBeenCalled();
+    });
+  });
+
+  describe('Tracking', () => {
+    it('tracks clicks on the run button', async () => {
+      (global as any).fetch.mockResolvedValue({
+        json: () =>
+          Promise.resolve({
+            stderr: [],
+            exit_code: 0,
+            stdout: '',
+          }),
+      });
+      const { view } = renderWrapper({
+        onChange: jest.fn(),
+        text: 'test',
+        language: 'javascript',
+      });
+
+      const runButton = view.getByText('Run');
+      await act(async () => {
+        userEvent.click(runButton);
+      });
+
+      expect(trackClick).toHaveBeenCalledWith('run');
+    });
+
+    it('tracks clicks on the copy codebyte button', () => {
+      const { view } = renderWrapper({
+        onChange: jest.fn(),
+        text: 'test',
+        language: 'javascript',
+      });
+
+      const copyButton = view.getByTestId('copy-codebyte-btn');
+      userEvent.click(copyButton);
+
+      expect(trackClick).toHaveBeenCalledWith('copy');
+    });
+  });
+});