f3859ff2b9
Remove MockData from the constructor parameters of MockTypescriptHost since the entire Tour of Heroes (TOH) project is now loaded from disk. Added a new method `reset()` to MockTypescriptHost that is necessary to reset the state of the project before each spec if run to make sure previous overrides are cleared. PR Close #32752
81 lines
3.1 KiB
TypeScript
81 lines
3.1 KiB
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by an MIT-style license that can be
|
|
* found in the LICENSE file at https://angular.io/license
|
|
*/
|
|
|
|
import * as path from 'path';
|
|
import * as ts from 'typescript';
|
|
|
|
import {ReflectorHost} from '../src/reflector_host';
|
|
import {TypeScriptServiceHost} from '../src/typescript_host';
|
|
|
|
import {MockTypescriptHost} from './test_utils';
|
|
|
|
describe('reflector_host_spec', () => {
|
|
|
|
// Regression #21811
|
|
it('should be able to find angular under windows', () => {
|
|
const originalJoin = path.join;
|
|
const originalPosixJoin = path.posix.join;
|
|
const mockHost =
|
|
new MockTypescriptHost(['/app/main.ts', '/app/parsing-cases.ts'], 'node_modules', {
|
|
...path,
|
|
join: (...args: string[]) => originalJoin.apply(path, args),
|
|
posix:
|
|
{...path.posix, join: (...args: string[]) => originalPosixJoin.apply(path, args)}
|
|
});
|
|
const reflectorHost = new ReflectorHost(() => undefined as any, mockHost);
|
|
|
|
if (process.platform !== 'win32') {
|
|
// If we call this in Windows it will cause a 'Maximum call stack size exceeded error'
|
|
// Because we are spying on the same function that we are call faking
|
|
spyOn(path, 'join').and.callFake((...args: string[]) => { return path.win32.join(...args); });
|
|
}
|
|
|
|
const result = reflectorHost.moduleNameToFileName('@angular/core');
|
|
expect(result).not.toBeNull('could not find @angular/core using path.win32');
|
|
});
|
|
|
|
it('should use module resolution cache', () => {
|
|
const mockHost = new MockTypescriptHost(['/app/main.ts']);
|
|
// TypeScript relies on `ModuleResolutionHost.fileExists()` to perform
|
|
// module resolution, so spy on this method to determine how many times
|
|
// it's called.
|
|
const spy = spyOn(mockHost, 'fileExists').and.callThrough();
|
|
|
|
const tsLS = ts.createLanguageService(mockHost);
|
|
|
|
// First count is zero due to lazy instantiation of the StaticReflector
|
|
// and MetadataResolver.
|
|
const ngLSHost = new TypeScriptServiceHost(mockHost, tsLS);
|
|
const firstCount = spy.calls.count();
|
|
expect(firstCount).toBe(0);
|
|
spy.calls.reset();
|
|
|
|
// Second count is due to resolution of the Tour of Heroes (toh) project.
|
|
// This resolves all Angular directives in the project.
|
|
ngLSHost.getAnalyzedModules();
|
|
const secondCount = spy.calls.count();
|
|
expect(secondCount).toBeGreaterThan(700);
|
|
expect(secondCount).toBeLessThan(800);
|
|
spy.calls.reset();
|
|
|
|
// Third count is due to recompution after the program changes.
|
|
mockHost.addCode(''); // this will mark project as dirty
|
|
ngLSHost.getAnalyzedModules();
|
|
const thirdCount = spy.calls.count();
|
|
expect(thirdCount).toBeGreaterThan(0);
|
|
expect(thirdCount).toBeLessThan(10);
|
|
|
|
// Summary
|
|
// | | First Count | Second Count | Third Count |
|
|
// |---------------|-------------|--------------|-------------|
|
|
// | Without Cache | 2581 | 6291 | 257 |
|
|
// | With Cache | 26 | 550 | 84 |
|
|
// | Improvement | ~100x | ~10x | ~3x |
|
|
});
|
|
});
|