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thymikeethymikee
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Initial implementation
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‎.babelrc

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{
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"presets": ["babel-preset-react", "flow", ["env", {"targets": {"node": 4}}]]
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}

‎.flowconfig

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[version]
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^0.51.0

‎.gitignore

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# dotenv environment variables file
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.env
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‎.npmignore

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/src

‎__tests__/__snapshots__/snapshotDiff.test.js.snap

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// Jest Snapshot v1, https://goo.gl/fbAQLP
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exports[`can colorize diff 1`] = `
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"- Second value
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+ Received
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   some
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   some
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   some
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   some
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   some
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   some
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   some
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   not
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+  so
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   very
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   long
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   script"
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`;
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exports[`can expand diff 1`] = `
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"- Second value
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+ Received
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some
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some
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some
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some
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some
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some
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some
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not
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+ so
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very
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long
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script"
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`;
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exports[`collapses diffs and strips ansi by default 1`] = `
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"- Second value
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+ Received
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@@ -5,8 +5,9 @@
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some
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some
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some
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some
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not
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+ so
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very
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long
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script"
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`;
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exports[`detects React components 1`] = `
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"- <Component test=\\"say\\" />
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+ <Component test=\\"my name\\" />
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@@ -1,14 +1,14 @@
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<div>
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<span />
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<span />
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<span />
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<span>
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- say
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+ my name
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</span>
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<span>
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- say
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+ my name
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</span>
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span>
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- say
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+ my name
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</span>
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<span />
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<span />
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<span />
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<span />"
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`;

‎__tests__/snapshotDiff.test.js

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// @flow
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const React = require('react');
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const snapshotDiff = require('../src/index');
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const a = `
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some
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some
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some
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some
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some
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some
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some
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not
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very
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long
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script
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`;
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const b = `
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some
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some
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some
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some
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some
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some
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some
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not
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so
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very
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long
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script
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`;
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class Component extends React.Component {
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render() {
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return (
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<div>
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<span />
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<span />
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<span />
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<span>
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{this.props.test}
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</span>
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<span>
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{this.props.test}
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</span>
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span>
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{this.props.test}
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</span>
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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<span />
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</div>
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);
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}
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}
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test('collapses diffs and strips ansi by default', () => {
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expect(snapshotDiff(a, b)).toMatchSnapshot();
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});
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test('can expand diff', () => {
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expect(snapshotDiff(a, b, {expand: true})).toMatchSnapshot();
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});
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test('can colorize diff', () => {
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expect(snapshotDiff(a, b, {colors: true})).toMatchSnapshot();
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});
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test('detects React components', () => {
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expect(
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snapshotDiff(<Component test="say" />, <Component test="my name" />)
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).toMatchSnapshot();
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});

‎build/index.js

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'use strict';
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var diff = require('jest-diff');
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var prettyFormat = require('pretty-format');
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var ReactElement = prettyFormat.plugins.ReactElement;
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var reactElement = Symbol.for('react.element');
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var defaultOptions = {
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expand: false,
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colors: false
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};
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var snapshotDiff = function snapshotDiff(valueA, valueB) {
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var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : defaultOptions;
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var difference = void 0;
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if (isReactComponent(valueA) && isReactComponent(valueB)) {
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difference = diffReactComponents(valueA, valueB, options);
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} else {
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difference = diffStrings(valueA, valueB, options);
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}
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if (!options.colors) {
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var stripAnsi = require('strip-ansi');
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return stripAnsi(difference);
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}
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return difference;
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};
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var isReactComponent = function isReactComponent(valueA) {
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return valueA && valueA.$$typeof === reactElement;
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};
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function diffStrings(valueA, valueB, options) {
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return diff(valueA, valueB, {
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expand: options.expand,
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aAnnotation: 'First value',
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aAnnotation: 'Second value'
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});
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}
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function diffReactComponents(valueA, valueB, options) {
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var renderer = require('react-test-renderer');
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var reactValueA = renderer.create(valueA).toJSON();
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var reactValueB = renderer.create(valueB).toJSON();
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var aAnnotation = valueA.type.displayName || valueA.type.name || 'Unknown';
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var bAnnotation = valueB.type.displayName || valueB.type.name || 'Unknown';
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var prettyFormatOptions = { plugins: [ReactElement], min: true };
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return diff(reactValueA, reactValueB, {
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expand: options.expand,
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aAnnotation: prettyFormat(valueA, prettyFormatOptions),
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bAnnotation: prettyFormat(valueB, prettyFormatOptions)
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});
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}
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module.exports = snapshotDiff;

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