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refactor(ivy): ngcc - implement abstract FileSystem (#29643)

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This commit introduces a new interface, which abstracts access
to the underlying `FileSystem`. There is initially one concrete
implementation, `NodeJsFileSystem`, which is simply wrapping the
`fs` library of NodeJs.

Going forward, we can provide a `MockFileSystem` for test, which
should allow us to stop using `mock-fs` for most of the unit tests.
We could also implement a `CachedFileSystem` that may improve the
performance of ngcc.

PR Close #29643
This commit is contained in:
Pete Bacon Darwin
2019-04-28 20:47:57 +01:00
committed by Andrew Kushnir
parent 1fd2cc6340
commit 16d7dde2ad
36 changed files with 590 additions and 353 deletions
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35
packages/compiler-cli/ngcc/test/packages/entry_point_spec.ts
View File

@ -6,24 +6,27 @@
* found in the LICENSE file at https://angular.io/license
*/
import {AbsoluteFsPath} from '@angular/compiler-cli/src/ngtsc/path';
import {readFileSync} from 'fs';
import * as mockFs from 'mock-fs';
import {AbsoluteFsPath} from '../../../src/ngtsc/path';
import {NodeJSFileSystem} from '../../src/file_system/node_js_file_system';
import {getEntryPointInfo} from '../../src/packages/entry_point';
import {MockLogger} from '../helpers/mock_logger';
const _ = AbsoluteFsPath.fromUnchecked;
describe('getEntryPointInfo()', () => {
beforeEach(createMockFileSystem);
afterEach(restoreRealFileSystem);
const _ = AbsoluteFsPath.from;
const SOME_PACKAGE = _('/some_package');
it('should return an object containing absolute paths to the formats of the specified entry-point',
() => {
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/valid_entry_point'));
const fs = new NodeJSFileSystem();
const entryPoint = getEntryPointInfo(
fs, new MockLogger(), SOME_PACKAGE, _('/some_package/valid_entry_point'));
expect(entryPoint).toEqual({
name: 'some-package/valid_entry_point',
package: SOME_PACKAGE,
@ -35,21 +38,24 @@ describe('getEntryPointInfo()', () => {
});
it('should return null if there is no package.json at the entry-point path', () => {
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/missing_package_json'));
const fs = new NodeJSFileSystem();
const entryPoint = getEntryPointInfo(
fs, new MockLogger(), SOME_PACKAGE, _('/some_package/missing_package_json'));
expect(entryPoint).toBe(null);
});
it('should return null if there is no typings or types field in the package.json', () => {
const fs = new NodeJSFileSystem();
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/missing_typings'));
getEntryPointInfo(fs, new MockLogger(), SOME_PACKAGE, _('/some_package/missing_typings'));
expect(entryPoint).toBe(null);
});
it('should return an object with `compiledByAngular` set to false if there is no metadata.json file next to the typing file',
() => {
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/missing_metadata'));
const fs = new NodeJSFileSystem();
const entryPoint = getEntryPointInfo(
fs, new MockLogger(), SOME_PACKAGE, _('/some_package/missing_metadata'));
expect(entryPoint).toEqual({
name: 'some-package/missing_metadata',
package: SOME_PACKAGE,
@ -61,8 +67,9 @@ describe('getEntryPointInfo()', () => {
});
it('should work if the typings field is named `types', () => {
const fs = new NodeJSFileSystem();
const entryPoint = getEntryPointInfo(
new MockLogger(), SOME_PACKAGE, _('/some_package/types_rather_than_typings'));
fs, new MockLogger(), SOME_PACKAGE, _('/some_package/types_rather_than_typings'));
expect(entryPoint).toEqual({
name: 'some-package/types_rather_than_typings',
package: SOME_PACKAGE,
@ -74,8 +81,9 @@ describe('getEntryPointInfo()', () => {
});
it('should work with Angular Material style package.json', () => {
const fs = new NodeJSFileSystem();
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/material_style'));
getEntryPointInfo(fs, new MockLogger(), SOME_PACKAGE, _('/some_package/material_style'));
expect(entryPoint).toEqual({
name: 'some_package/material_style',
package: SOME_PACKAGE,
@ -87,8 +95,9 @@ describe('getEntryPointInfo()', () => {
});
it('should return null if the package.json is not valid JSON', () => {
const entryPoint =
getEntryPointInfo(new MockLogger(), SOME_PACKAGE, _('/some_package/unexpected_symbols'));
const fs = new NodeJSFileSystem();
const entryPoint = getEntryPointInfo(
fs, new MockLogger(), SOME_PACKAGE, _('/some_package/unexpected_symbols'));
expect(entryPoint).toBe(null);
});
});