forked from jestjs/jest
/
index.ts
173 lines (154 loc) · 4.68 KB
/
index.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 {IHasteFS} from 'jest-haste-map';
import type {ResolveModuleConfig, default as Resolver} from 'jest-resolve';
import {SnapshotResolver, isSnapshotPath} from 'jest-snapshot';
export type ResolvedModule = {
file: string;
dependencies: Array<string>;
};
/**
* DependencyResolver is used to resolve the direct dependencies of a module or
* to retrieve a list of all transitive inverse dependencies.
*/
export class DependencyResolver {
private _hasteFS: IHasteFS;
private _resolver: Resolver;
private _snapshotResolver: SnapshotResolver;
constructor(
resolver: Resolver,
hasteFS: IHasteFS,
snapshotResolver: SnapshotResolver,
) {
this._resolver = resolver;
this._hasteFS = hasteFS;
this._snapshotResolver = snapshotResolver;
}
resolve(file: string, options?: ResolveModuleConfig): Array<string> {
const dependencies = this._hasteFS.getDependencies(file);
if (!dependencies) {
return [];
}
return dependencies.reduce<Array<string>>((acc, dependency) => {
if (this._resolver.isCoreModule(dependency)) {
return acc;
}
let resolvedDependency;
let resolvedMockDependency;
try {
resolvedDependency = this._resolver.resolveModule(
file,
dependency,
options,
);
} catch {
try {
resolvedDependency = this._resolver.getMockModule(file, dependency);
} catch {
// leave resolvedDependency as undefined if nothing can be found
}
}
if (!resolvedDependency) {
return acc;
}
acc.push(resolvedDependency);
// If we resolve a dependency, then look for a mock dependency
// of the same name in that dependency's directory.
try {
resolvedMockDependency = this._resolver.getMockModule(
resolvedDependency,
path.basename(dependency),
);
} catch {
// leave resolvedMockDependency as undefined if nothing can be found
}
if (resolvedMockDependency) {
const dependencyMockDir = path.resolve(
path.dirname(resolvedDependency),
'__mocks__',
);
resolvedMockDependency = path.resolve(resolvedMockDependency);
// make sure mock is in the correct directory
if (dependencyMockDir === path.dirname(resolvedMockDependency)) {
acc.push(resolvedMockDependency);
}
}
return acc;
}, []);
}
resolveInverseModuleMap(
paths: Set<string>,
filter: (file: string) => boolean,
options?: ResolveModuleConfig,
): Array<ResolvedModule> {
if (!paths.size) {
return [];
}
const collectModules = (
related: Set<string>,
moduleMap: Array<ResolvedModule>,
changed: Set<string>,
) => {
const visitedModules = new Set();
const result: Array<ResolvedModule> = [];
while (changed.size) {
changed = new Set(
moduleMap.reduce<Array<string>>((acc, module) => {
if (
visitedModules.has(module.file) ||
!module.dependencies.some(dep => changed.has(dep))
) {
return acc;
}
const file = module.file;
if (filter(file)) {
result.push(module);
related.delete(file);
}
visitedModules.add(file);
acc.push(file);
return acc;
}, []),
);
}
return result.concat(
Array.from(related).map(file => ({dependencies: [], file})),
);
};
const relatedPaths = new Set<string>();
const changed: Set<string> = new Set();
for (const path of paths) {
if (this._hasteFS.exists(path)) {
const modulePath = isSnapshotPath(path)
? this._snapshotResolver.resolveTestPath(path)
: path;
changed.add(modulePath);
if (filter(modulePath)) {
relatedPaths.add(modulePath);
}
}
}
const modules: Array<ResolvedModule> = [];
for (const file of this._hasteFS.getAbsoluteFileIterator()) {
modules.push({
dependencies: this.resolve(file, options),
file,
});
}
return collectModules(relatedPaths, modules, changed);
}
resolveInverse(
paths: Set<string>,
filter: (file: string) => boolean,
options?: ResolveModuleConfig,
): Array<string> {
return this.resolveInverseModuleMap(paths, filter, options).map(
module => module.file,
);
}
}