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If you have two HTML fragments, f1 and f2, and both fragments contain `<h2>text</h2>`, diffable-html arbitrarily adds and removes whitespace within the `<h2>` based on the surrounding context. That makes it useless for our purposes. Prettier's behavior appears to be much more consistent.
88 lines
2.5 KiB
JavaScript
88 lines
2.5 KiB
JavaScript
const _ = require('lodash');
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const { addMatchers } = require('add-matchers');
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const { format } = require('prettier');
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function formatHtml(str) {
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return format(str, {
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parser: 'html',
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tabWidth: 2,
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});
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}
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// Prettier lazy-loads its parsers, so preload the HTML parser while we know we're not mocked.
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require('prettier/parser-html');
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// Add matchers from https://github.com/JamieMason/Jasmine-Matchers.
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require('jasmine-expect');
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addMatchers({
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toBeError(value) {
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return value instanceof Error;
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},
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toBeErrorOfType(other, value) {
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return value instanceof Error && value.name === other;
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},
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toBeInstanceOf(other, value) {
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let otherName;
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let valueName;
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if (typeof value !== 'object') {
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throw new TypeError(`Expected object value, got ${typeof value}`);
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}
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valueName = value.constructor.name;
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if (typeof other === 'string') {
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// Class name.
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otherName = other;
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} else if (typeof other === 'function') {
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// Class constructor.
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otherName = other.name;
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} else {
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otherName = other.constructor.name;
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}
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return valueName === otherName;
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},
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toContainHtml(other, value) {
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const otherDiffable = formatHtml(other);
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const valueDiffable = formatHtml(value);
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return valueDiffable.includes(otherDiffable);
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},
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toHaveOwnProperty(other, value) {
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return Object.hasOwn(value, other);
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},
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// The objects in `value` must have all of the keys and values from the corresponding objects in
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// `other`. The object in `value` can have additional properties as well. For example, if
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// `other[0]` is `{ a: 1 }`, and `value[0]` is `{ a: 1, b: 2 }`, then the objects match.
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toMatchArrayOfObjects(other, value) {
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let isMatch = true;
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if (!Array.isArray(value)) {
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throw new TypeError(`Expected array value, got ${typeof value}`);
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}
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if (!Array.isArray(other)) {
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throw new TypeError(`Expected array value as expected value, got ${typeof other}`);
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}
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if (other.length !== value.length) {
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isMatch = false;
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} else {
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for (let i = 0, l = value.length; i < l; i++) {
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if (!_.isMatch(value[i], other[i])) {
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isMatch = false;
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break;
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}
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}
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}
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return isMatch;
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},
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// The `value` object must have all of the keys and values from the `other` object. The `value`
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// object can have additional properties as well. For example, if `other` is `{ a: 1 }`, and
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// `value` is `{ a: 1, b: 2 }`, then the objects match.
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toMatchObject(other, value) {
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return _.isMatch(value, other);
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},
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});
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