71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
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const { isObject } = require('lodash');
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const mockAST = require('../__fixtures__/ast-yaml-challenge.json');
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const processFrontmatter = require('./add-frontmatter');
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describe('process-frontmatter plugin', () => {
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const plugin = processFrontmatter();
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let file = { data: {} };
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beforeEach(() => {
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file = { data: {} };
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});
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it('should return a plugin which is a function', () => {
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expect(typeof plugin).toEqual('function');
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});
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it('should maintain an object for the `file.data` property', () => {
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plugin(mockAST, file);
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expect(isObject(file.data)).toBe(true);
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});
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// And no others. The AST includes some yaml code, and this also
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// checks that none of those keys get parsed
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it('should add all keys from frontmatter to the `file.data` property', () => {
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const expectedKeys = [
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'id',
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'title',
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'challengeType',
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'videoUrl',
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'forumTopicId'
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];
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plugin(mockAST, file);
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const actualKeys = Object.keys(file.data);
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expect(actualKeys).toEqual(expectedKeys);
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});
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it('should not mutate any type held in the frontmatter', () => {
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expect.assertions(5);
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plugin(mockAST, file);
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const { id, title, challengeType, videoUrl, forumTopicId } = file.data;
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expect(typeof id).toEqual('string');
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expect(typeof title).toEqual('string');
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expect(typeof challengeType).toEqual('number');
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expect(typeof videoUrl).toEqual('string');
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expect(typeof forumTopicId).toEqual('number');
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});
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it('should trim extra whitespace from keys and values', () => {
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expect.assertions(8);
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plugin(mockAST, file);
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const whitespaceRE = /(^\s\S+|\S\s$)/;
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const keys = Object.keys(file.data);
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keys.forEach(key => expect(whitespaceRE.test(key)).toBe(false));
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const values = keys.map(key => file.data[key]);
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values
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.filter(value => typeof value === 'string')
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.forEach(value => expect(whitespaceRE.test(value)).toBe(false));
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});
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it('should not mutate url strings', () => {
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const expectedUrl = 'https://scrimba.com/p/pVMPUv/cE8Gpt2';
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plugin(mockAST, file);
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expect(file.data.videoUrl).toEqual(expectedUrl);
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});
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it('should have an output to match the snapshot', () => {
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plugin(mockAST, file);
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expect(file.data).toMatchSnapshot();
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});
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});
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