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const fs = require('fs');

const plugins = fs.readFileSync('./plugins.json').toString();

// helper function

const countPluginKey = (plugins, key) => plugins

.reduce((previous, plugin) => !!plugin[key] ? previous += 1 : previous, 0);

describe('plugins', () => {

it('should be valid JSON', () => {

expect(() => {JSON.parse(plugins)}).not.toThrow();

});

it('should have all required keys', () => {

const parsed = JSON.parse(plugins);

const pluginsCount = parsed.length;

const nameCount = countPluginKey(parsed, 'name');

const descriptionCount = countPluginKey(parsed, 'description');

const githubUrlCount = countPluginKey(parsed, 'githubUrl');

expect(nameCount).toBe(pluginsCount);

expect(descriptionCount).toBe(pluginsCount);

expect(githubUrlCount).toBe(pluginsCount);

});

it('should be unique', () => {

const parsed = JSON.parse(plugins);

const pluginsCount = parsed.length;

// create an array only containing the plugin names

const pluginNames = parsed.map((plugin) => plugin.name);

const uniquePlugins = [];

pluginNames.forEach((plugin) => {

if (uniquePlugins.indexOf(plugin) === -1) uniquePlugins.push(plugin)

});

const uniquePluginsCount = uniquePlugins.length;

expect(pluginsCount).toBe(uniquePluginsCount);

});

});