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chentsulinchentsulin
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feat(snapshot): support snapshotResolver and snapshotSerializers written in ESM
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18 files changed

+374
-42
lines changed

18 files changed

+374
-42
lines changed

‎e2e/__tests__/circusDeclarationErrors.test.ts‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -12,8 +12,8 @@ import runJest from '../runJest';
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skipSuiteOnJasmine();
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it('defining tests and hooks asynchronously throws', () => {
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const result = runJest('circus-declaration-errors', [
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it('defining tests and hooks asynchronously throws', async () => {
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const result = await runJest('circus-declaration-errors', [
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'asyncDefinition.test.js',
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]);
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‎e2e/__tests__/transform.test.ts‎

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@@ -347,4 +347,40 @@ onNodeVersions('>=12.17.0', () => {
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expect(json.numPassedTests).toBe(1);
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});
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});
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describe('transform-esm-snapshotResolver', () => {
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const dir = path.resolve(
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__dirname,
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'..',
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'transform/transform-esm-snapshotResolver',
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);
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const snapshotDir = path.resolve(dir, '__snapshots__');
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const snapshotFile = path.resolve(snapshotDir, 'snapshot.test.js.snap');
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const cleanupTest = () => {
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if (fs.existsSync(snapshotFile)) {
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fs.unlinkSync(snapshotFile);
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}
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if (fs.existsSync(snapshotDir)) {
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fs.rmdirSync(snapshotDir);
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}
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};
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beforeAll(() => {
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runYarnInstall(dir);
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});
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beforeEach(cleanupTest);
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afterAll(cleanupTest);
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it('should transform the snapshotResolver', () => {
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const result = runJest(dir, ['-w=1', '--no-cache', '--ci=false']);
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expect(result.stderr).toMatch('1 snapshot written from 1 test suite');
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const contents = require(snapshotFile);
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expect(contents).toHaveProperty(
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'snapshots are written to custom location 1',
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);
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});
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});
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});

‎e2e/snapshot-serializers-esm/__tests__/snapshot.test.js‎

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@@ -0,0 +1,110 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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'use strict';
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describe('snapshot serializers', () => {
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it('works with first plugin', () => {
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const test = {
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foo: 1,
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};
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expect(test).toMatchSnapshot();
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});
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it('works with second plugin', () => {
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const test = {
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bar: 2,
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};
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expect(test).toMatchSnapshot();
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});
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it('works with nested serializable objects', () => {
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const test = {
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foo: {
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bar: 2,
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},
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};
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expect(test).toMatchSnapshot();
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});
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it('works with default serializers', () => {
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const test = {
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$$typeof: Symbol.for('react.test.json'),
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children: null,
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props: {
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id: 'foo',
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},
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type: 'div',
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};
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expect(test).toMatchSnapshot();
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});
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it('works with prepended plugins and default serializers', () => {
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const test = {
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$$typeof: Symbol.for('react.test.json'),
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children: null,
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props: {
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aProp: {a: 6},
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bProp: {foo: 8},
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},
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type: 'div',
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};
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expect(test).toMatchSnapshot();
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});
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it('works with prepended plugins from expect method called once', () => {
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const test = {
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$$typeof: Symbol.for('react.test.json'),
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children: null,
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props: {
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aProp: {a: 6},
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bProp: {foo: 8},
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},
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type: 'div',
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};
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// Add plugin that overrides foo specified by Jest config in package.json
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expect.addSnapshotSerializer({
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print: (val, serialize) => `Foo: ${serialize(val.foo)}`,
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test: val => val && val.hasOwnProperty('foo'),
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});
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expect(test).toMatchSnapshot();
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});
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it('works with prepended plugins from expect method called twice', () => {
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const test = {
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$$typeof: Symbol.for('react.test.json'),
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children: null,
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props: {
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aProp: {a: 6},
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bProp: {foo: 8},
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},
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type: 'div',
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};
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// Add plugin that overrides preceding added plugin
88+
expect.addSnapshotSerializer({
89+
print: (val, serialize) => `FOO: ${serialize(val.foo)}`,
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test: val => val && val.hasOwnProperty('foo'),
91+
});
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expect(test).toMatchSnapshot();
93+
});
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it('works with array of strings in property matcher', () => {
96+
expect({
97+
arrayOfStrings: ['stream'],
98+
}).toMatchSnapshot({
99+
arrayOfStrings: ['stream'],
100+
});
101+
});
102+
103+
it('works with expect.XXX within array in property matcher', () => {
104+
expect({
105+
arrayOfStrings: ['stream'],
106+
}).toMatchSnapshot({
107+
arrayOfStrings: [expect.any(String)],
108+
});
109+
});
110+
});

‎e2e/snapshot-serializers-esm/package.json‎

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{
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"jest": {
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"testEnvironment": "node",
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"transform": {
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"\\.js$": "<rootDir>/transformer.js"
6+
},
7+
"snapshotSerializers": [
8+
"./plugins/foo",
9+
"<rootDir>/plugins/bar"
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]
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}
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}

‎e2e/snapshot-serializers-esm/plugins/bar.mjs‎

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@@ -0,0 +1,11 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*
7+
*/
8+
9+
import {createPlugin} from '../utils';
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// We inject the call to "createPlugin('bar') through the transformer"

‎e2e/snapshot-serializers-esm/plugins/foo/index.mjs‎

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@@ -0,0 +1,10 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*
7+
*/
8+
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import {createPlugin} from '../../utils';
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export default createPlugin('foo');

‎e2e/snapshot-serializers-esm/transformer.js‎

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@@ -0,0 +1,17 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*/
7+
8+
'use strict';
9+
10+
module.exports = {
11+
process(src, filename) {
12+
if (/bar.mjs$/.test(filename)) {
13+
return `${src};\nmodule.exports = createPlugin('bar');`;
14+
}
15+
return src;
16+
},
17+
};

‎e2e/snapshot-serializers-esm/utils.mjs‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
3+
*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*
7+
*/
8+
9+
export const createPlugin = prop => ({
10+
print: (val, serialize) => `${prop} - ${serialize(val[prop])}`,
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test: val => val && val.hasOwnProperty(prop),
12+
});

‎e2e/transform/transform-esm-snapshotResolver/__tests__/snapshot.test.js‎

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@@ -0,0 +1,10 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*/
7+
8+
test('snapshots are written to custom location', () => {
9+
expect('foobar').toMatchSnapshot();
10+
});

‎e2e/transform/transform-esm-snapshotResolver/customSnapshotResolver.mjs‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,22 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
3+
*
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* This source code is licensed under the MIT license found in the
5+
* LICENSE file in the root directory of this source tree.
6+
*/
7+
8+
import {SnapshotResolver} from 'jest-snapshot';
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10+
const snapshotResolver = {
11+
resolveSnapshotPath: (testPath, snapshotExtension) =>
12+
testPath.replace('__tests__', '__snapshots__') + snapshotExtension,
13+
14+
resolveTestPath: (snapshotFilePath, snapshotExtension) =>
15+
snapshotFilePath
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.replace('__snapshots__', '__tests__')
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.slice(0, -(snapshotExtension || '').length),
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testPathForConsistencyCheck: 'foo/__tests__/bar.test.js',
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};
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export default snapshotResolver;

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