angular-cn/packages/compiler-cli/test/transformers/compiler_host_spec.ts

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/**
* @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 compiler from '@angular/compiler';
import * as ts from 'typescript';
import {MetadataCollector} from '../../src/metadata/collector';
import {CompilerHost, CompilerOptions, LibrarySummary} from '../../src/transformers/api';
import {TsCompilerAotCompilerTypeCheckHostAdapter, createCompilerHost} from '../../src/transformers/compiler_host';
import {Directory, Entry, MockAotContext, MockCompilerHost} from '../mocks';
const dummyModule = 'export let foo: any[];';
const aGeneratedFile = new compiler.GeneratedFile(
'/tmp/src/index.ts', '/tmp/src/index.ngfactory.ts',
[new compiler.DeclareVarStmt('x', new compiler.LiteralExpr(1))]);
const aGeneratedFileText = `var x:any = 1;\n`;
describe('NgCompilerHost', () => {
let codeGenerator: {generateFile: jasmine.Spy; findGeneratedFileNames: jasmine.Spy;};
beforeEach(() => {
codeGenerator = {
generateFile: jasmine.createSpy('generateFile').and.returnValue(null),
findGeneratedFileNames: jasmine.createSpy('findGeneratedFileNames').and.returnValue([]),
};
});
function createNgHost({files = {}}: {files?: Directory} = {}): CompilerHost {
const context = new MockAotContext('/tmp/', files);
return new MockCompilerHost(context) as ts.CompilerHost;
}
function createHost({
files = {},
options = {
basePath: '/tmp',
moduleResolution: ts.ModuleResolutionKind.NodeJs,
},
rootNames = ['/tmp/index.ts'],
ngHost = createNgHost({files}),
librarySummaries = [],
}: {
files?: Directory,
options?: CompilerOptions,
rootNames?: string[],
ngHost?: CompilerHost,
librarySummaries?: LibrarySummary[]
} = {}) {
return new TsCompilerAotCompilerTypeCheckHostAdapter(
rootNames, options, ngHost, new MetadataCollector(), codeGenerator,
new Map(librarySummaries.map(entry => [entry.fileName, entry] as[string, LibrarySummary])));
}
describe('fileNameToModuleName', () => {
let host: TsCompilerAotCompilerTypeCheckHostAdapter;
beforeEach(() => { host = createHost(); });
it('should use a package import when accessing a package from a source file', () => {
expect(host.fileNameToModuleName('/tmp/node_modules/@angular/core.d.ts', '/tmp/main.ts'))
.toBe('@angular/core');
});
it('should use a package import when accessing a package from another package', () => {
expect(host.fileNameToModuleName(
'/tmp/node_modules/mod1/index.d.ts', '/tmp/node_modules/mod2/index.d.ts'))
.toBe('mod1/index');
expect(host.fileNameToModuleName(
'/tmp/node_modules/@angular/core/index.d.ts',
'/tmp/node_modules/@angular/common/index.d.ts'))
.toBe('@angular/core/index');
});
it('should use a relative import when accessing a file in the same package', () => {
expect(host.fileNameToModuleName(
'/tmp/node_modules/mod/a/child.d.ts', '/tmp/node_modules/mod/index.d.ts'))
.toBe('./a/child');
expect(host.fileNameToModuleName(
'/tmp/node_modules/@angular/core/src/core.d.ts',
'/tmp/node_modules/@angular/core/index.d.ts'))
.toBe('./src/core');
});
it('should use a relative import when accessing a source file from a source file', () => {
expect(host.fileNameToModuleName('/tmp/src/a/child.ts', '/tmp/src/index.ts'))
.toBe('./a/child');
});
it('should use a relative import when accessing generated files, even if crossing packages',
() => {
expect(host.fileNameToModuleName(
'/tmp/node_modules/mod2/b.ngfactory.d.ts',
'/tmp/node_modules/mod1/a.ngfactory.d.ts'))
.toBe('../mod2/b.ngfactory');
});
it('should support multiple rootDirs when accessing a source file form a source file', () => {
const hostWithMultipleRoots = createHost({
options: {
basePath: '/tmp/',
rootDirs: [
'src/a',
'src/b',
]
}
});
// both files are in the rootDirs
expect(hostWithMultipleRoots.fileNameToModuleName('/tmp/src/b/b.ts', '/tmp/src/a/a.ts'))
.toBe('./b');
// one file is not in the rootDirs
expect(hostWithMultipleRoots.fileNameToModuleName('/tmp/src/c/c.ts', '/tmp/src/a/a.ts'))
.toBe('../c/c');
});
it('should error if accessing a source file from a package', () => {
expect(
() => host.fileNameToModuleName(
'/tmp/src/a/child.ts', '/tmp/node_modules/@angular/core.d.ts'))
.toThrowError(
'Trying to import a source file from a node_modules package: ' +
'import /tmp/src/a/child.ts from /tmp/node_modules/@angular/core.d.ts');
});
it('should use the provided implementation if any', () => {
const ngHost = createNgHost();
ngHost.fileNameToModuleName = () => 'someResult';
const host = createHost({ngHost});
expect(host.fileNameToModuleName('a', 'b')).toBe('someResult');
});
});
describe('moduleNameToFileName', () => {
it('should resolve an import using the containing file', () => {
const host = createHost({files: {'tmp': {'src': {'a': {'child.d.ts': dummyModule}}}}});
expect(host.moduleNameToFileName('./a/child', '/tmp/src/index.ts'))
.toBe('/tmp/src/a/child.d.ts');
});
it('should allow to skip the containing file for package imports', () => {
const host =
createHost({files: {'tmp': {'node_modules': {'@core': {'index.d.ts': dummyModule}}}}});
expect(host.moduleNameToFileName('@core/index')).toBe('/tmp/node_modules/@core/index.d.ts');
});
it('should use the provided implementation if any', () => {
const ngHost = createNgHost();
ngHost.moduleNameToFileName = () => 'someResult';
const host = createHost({ngHost});
expect(host.moduleNameToFileName('a', 'b')).toBe('someResult');
});
it('should work well with windows paths', () => {
const host = createHost({
rootNames: ['\\tmp\\index.ts'],
options: {basePath: '\\tmp'},
files: {'tmp': {'node_modules': {'@core': {'index.d.ts': dummyModule}}}}
});
expect(host.moduleNameToFileName('@core/index')).toBe('/tmp/node_modules/@core/index.d.ts');
});
});
describe('resourceNameToFileName', () => {
it('should resolve a relative import', () => {
const host = createHost({files: {'tmp': {'src': {'a': {'child.html': '<div>'}}}}});
expect(host.resourceNameToFileName('./a/child.html', '/tmp/src/index.ts'))
.toBe('/tmp/src/a/child.html');
expect(host.resourceNameToFileName('./a/non-existing.html', '/tmp/src/index.ts')).toBe(null);
});
it('should resolve package paths as relative paths', () => {
const host = createHost({files: {'tmp': {'src': {'a': {'child.html': '<div>'}}}}});
expect(host.resourceNameToFileName('a/child.html', '/tmp/src/index.ts'))
.toBe('/tmp/src/a/child.html');
});
it('should resolve absolute paths as package paths', () => {
const host = createHost({files: {'tmp': {'node_modules': {'a': {'child.html': '<div>'}}}}});
expect(host.resourceNameToFileName('/a/child.html', ''))
.toBe('/tmp/node_modules/a/child.html');
});
it('should use the provided implementation if any', () => {
const ngHost = createNgHost();
ngHost.resourceNameToFileName = () => 'someResult';
const host = createHost({ngHost});
expect(host.resourceNameToFileName('a', 'b')).toBe('someResult');
});
});
describe('getSourceFile', () => {
it('should cache source files by name', () => {
const host = createHost({files: {'tmp': {'src': {'index.ts': ``}}}});
const sf1 = host.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
const sf2 = host.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
expect(sf1).toBe(sf2);
});
it('should generate code when asking for the base name and add it as referencedFiles', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(aGeneratedFile);
const host = createHost({
files: {
'tmp': {
'src': {
'index.ts': `
/// <reference path="main.ts"/>
`
}
}
}
});
const sf = host.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
expect(sf.referencedFiles[0].fileName).toBe('main.ts');
expect(sf.referencedFiles[1].fileName).toBe('/tmp/src/index.ngfactory.ts');
const genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(genSf.text).toBe(aGeneratedFileText);
// the codegen should have been cached
expect(codeGenerator.generateFile).toHaveBeenCalledTimes(1);
expect(codeGenerator.findGeneratedFileNames).toHaveBeenCalledTimes(1);
});
it('should generate code when asking for the generated name first', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(aGeneratedFile);
const host = createHost({
files: {
'tmp': {
'src': {
'index.ts': `
/// <reference path="main.ts"/>
`
}
}
}
});
const genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(genSf.text).toBe(aGeneratedFileText);
const sf = host.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
expect(sf.referencedFiles[0].fileName).toBe('main.ts');
expect(sf.referencedFiles[1].fileName).toBe('/tmp/src/index.ngfactory.ts');
// the codegen should have been cached
expect(codeGenerator.generateFile).toHaveBeenCalledTimes(1);
expect(codeGenerator.findGeneratedFileNames).toHaveBeenCalledTimes(1);
});
it('should clear old generated references if the original host cached them', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
const sfText = `
/// <reference path="main.ts"/>
`;
const ngHost = createNgHost({files: {'tmp': {'src': {'index.ts': sfText}}}});
const sf = ts.createSourceFile('/tmp/src/index.ts', sfText, ts.ScriptTarget.Latest);
ngHost.getSourceFile = () => sf;
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(
new compiler.GeneratedFile('/tmp/src/index.ts', '/tmp/src/index.ngfactory.ts', []));
const host1 = createHost({ngHost});
host1.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
expect(sf.referencedFiles.length).toBe(2);
expect(sf.referencedFiles[0].fileName).toBe('main.ts');
expect(sf.referencedFiles[1].fileName).toBe('/tmp/src/index.ngfactory.ts');
codeGenerator.findGeneratedFileNames.and.returnValue([]);
codeGenerator.generateFile.and.returnValue(null);
const host2 = createHost({ngHost});
host2.getSourceFile('/tmp/src/index.ts', ts.ScriptTarget.Latest);
expect(sf.referencedFiles.length).toBe(1);
expect(sf.referencedFiles[0].fileName).toBe('main.ts');
});
it('should generate for tsx files', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(aGeneratedFile);
const host = createHost({files: {'tmp': {'src': {'index.tsx': ``}}}});
const genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(genSf.text).toBe(aGeneratedFileText);
const sf = host.getSourceFile('/tmp/src/index.tsx', ts.ScriptTarget.Latest);
expect(sf.referencedFiles[0].fileName).toBe('/tmp/src/index.ngfactory.ts');
// the codegen should have been cached
expect(codeGenerator.generateFile).toHaveBeenCalledTimes(1);
expect(codeGenerator.findGeneratedFileNames).toHaveBeenCalledTimes(1);
});
});
describe('updateSourceFile', () => {
it('should update source files', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(aGeneratedFile);
const host = createHost({files: {'tmp': {'src': {'index.ts': ''}}}});
let genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(genSf.text).toBe(aGeneratedFileText);
host.updateGeneratedFile(new compiler.GeneratedFile(
'/tmp/src/index.ts', '/tmp/src/index.ngfactory.ts',
[new compiler.DeclareVarStmt('x', new compiler.LiteralExpr(2))]));
genSf = host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(genSf.text).toBe(`var x:any = 2;\n`);
});
it('should error if the imports changed', () => {
codeGenerator.findGeneratedFileNames.and.returnValue(['/tmp/src/index.ngfactory.ts']);
codeGenerator.generateFile.and.returnValue(new compiler.GeneratedFile(
'/tmp/src/index.ts', '/tmp/src/index.ngfactory.ts',
[new compiler.DeclareVarStmt(
'x',
new compiler.ExternalExpr(new compiler.ExternalReference('aModule', 'aName')))]));
const host = createHost({files: {'tmp': {'src': {'index.ts': ''}}}});
host.getSourceFile('/tmp/src/index.ngfactory.ts', ts.ScriptTarget.Latest);
expect(
() => host.updateGeneratedFile(new compiler.GeneratedFile(
'/tmp/src/index.ts', '/tmp/src/index.ngfactory.ts',
[new compiler.DeclareVarStmt(
'x', new compiler.ExternalExpr(
new compiler.ExternalReference('otherModule', 'aName')))])))
.toThrowError([
`Illegal State: external references changed in /tmp/src/index.ngfactory.ts.`,
`Old: aModule.`, `New: otherModule`
].join('\n'));
});
});
});