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jestAdapter.ts
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jestAdapter.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import * as path from 'path';
import type {Config} from '@jest/types';
import type {JestEnvironment} from '@jest/environment';
import type {TestResult} from '@jest/test-result';
import type {RuntimeType as Runtime} from 'jest-runtime';
import type {SnapshotStateType} from 'jest-snapshot';
const FRAMEWORK_INITIALIZER = path.resolve(__dirname, './jestAdapterInit.js');
const EXPECT_INITIALIZER = path.resolve(__dirname, './jestExpect.js');
const jestAdapter = async (
globalConfig: Config.GlobalConfig,
config: Config.ProjectConfig,
environment: JestEnvironment,
runtime: Runtime,
testPath: string,
): Promise<TestResult> => {
const {
initialize,
runAndTransformResultsToJestFormat,
} = runtime.requireInternalModule<typeof import('./jestAdapterInit')>(
FRAMEWORK_INITIALIZER,
);
runtime
.requireInternalModule<typeof import('./jestExpect')>(EXPECT_INITIALIZER)
.default({expand: globalConfig.expand});
const getPrettier = () =>
config.prettierPath ? require(config.prettierPath) : null;
const getBabelTraverse = () => require('@babel/traverse').default;
const {globals, snapshotState} = await initialize({
config,
environment,
getBabelTraverse,
getPrettier,
globalConfig,
localRequire: runtime.requireModule.bind(runtime),
parentProcess: process,
testPath,
});
if (config.timers === 'fake') {
// during setup, this cannot be null (and it's fine to explode if it is)
environment.fakeTimers!.useFakeTimers();
}
globals.beforeEach(() => {
if (config.resetModules) {
runtime.resetModules();
}
if (config.clearMocks) {
runtime.clearAllMocks();
}
if (config.resetMocks) {
runtime.resetAllMocks();
if (config.timers === 'fake') {
// during setup, this cannot be null (and it's fine to explode if it is)
environment.fakeTimers!.useFakeTimers();
}
}
if (config.restoreMocks) {
runtime.restoreAllMocks();
}
});
for (const path of config.setupFilesAfterEnv) {
const esm = runtime.unstable_shouldLoadAsEsm(path);
if (esm) {
await runtime.unstable_importModule(path);
} else {
runtime.requireModule(path);
}
}
const esm = runtime.unstable_shouldLoadAsEsm(testPath);
if (esm) {
await runtime.unstable_importModule(testPath);
} else {
runtime.requireModule(testPath);
}
const results = await runAndTransformResultsToJestFormat({
config,
globalConfig,
testPath,
});
return _addSnapshotData(results, snapshotState);
};
const _addSnapshotData = (
results: TestResult,
snapshotState: SnapshotStateType,
) => {
results.testResults.forEach(({fullName, status}) => {
if (status === 'pending' || status === 'failed') {
// if test is skipped or failed, we don't want to mark
// its snapshots as obsolete.
snapshotState.markSnapshotsAsCheckedForTest(fullName);
}
});
const uncheckedCount = snapshotState.getUncheckedCount();
const uncheckedKeys = snapshotState.getUncheckedKeys();
if (uncheckedCount) {
snapshotState.removeUncheckedKeys();
}
const status = snapshotState.save();
results.snapshot.fileDeleted = status.deleted;
results.snapshot.added = snapshotState.added;
results.snapshot.matched = snapshotState.matched;
results.snapshot.unmatched = snapshotState.unmatched;
results.snapshot.updated = snapshotState.updated;
results.snapshot.unchecked = !status.deleted ? uncheckedCount : 0;
// Copy the array to prevent memory leaks
results.snapshot.uncheckedKeys = Array.from(uncheckedKeys);
return results;
};
export = jestAdapter;