angular-docs-cn/packages/compiler-cli/test/transformers/metadata_reader_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 ts from 'typescript';
import {METADATA_VERSION, MetadataCollector, ModuleMetadata} from '../../src/metadata';
import {MetadataReaderHost, readMetadata} from '../../src/transformers/metadata_reader';
import {Directory, Entry, MockAotContext} from '../mocks';
describe('metadata reader', () => {
let host: MetadataReaderHost;
beforeEach(() => {
const context = new MockAotContext('/tmp/src', clone(FILES));
const metadataCollector = new MetadataCollector();
host = {
fileExists: (fileName) => context.fileExists(fileName),
readFile: (fileName) => context.readFile(fileName),
getSourceFileMetadata: (fileName) => {
const sourceText = context.readFile(fileName);
return sourceText != null ?
metadataCollector.getMetadata(
ts.createSourceFile(fileName, sourceText, ts.ScriptTarget.Latest)) :
undefined;
},
};
});
it('should be able to read a metadata file', () => {
expect(readMetadata('node_modules/@angular/core.d.ts', host)).toEqual([
{__symbolic: 'module', version: METADATA_VERSION, metadata: {foo: {__symbolic: 'class'}}}
]);
});
it('should be able to read metadata from an otherwise unused .d.ts file ', () => {
expect(readMetadata('node_modules/@angular/unused.d.ts', host)).toEqual([dummyMetadata]);
});
it('should be able to read empty metadata ',
() => { expect(readMetadata('node_modules/@angular/empty.d.ts', host)).toEqual([]); });
it('should return undefined for missing modules',
() => { expect(readMetadata('node_modules/@angular/missing.d.ts', host)).toBeUndefined(); });
it(`should add missing v${METADATA_VERSION} metadata from v1 metadata and .d.ts files`, () => {
expect(readMetadata('metadata_versions/v1.d.ts', host)).toEqual([
{__symbolic: 'module', version: 1, metadata: {foo: {__symbolic: 'class'}}}, {
__symbolic: 'module',
version: METADATA_VERSION,
metadata: {
foo: {__symbolic: 'class'},
aType: {__symbolic: 'interface'},
Bar: {__symbolic: 'class', members: {ngOnInit: [{__symbolic: 'method'}]}},
BarChild: {__symbolic: 'class', extends: {__symbolic: 'reference', name: 'Bar'}},
ReExport: {__symbolic: 'reference', module: './lib/utils2', name: 'ReExport'},
},
exports: [{from: './lib/utils2', export: ['Export']}],
}
]);
});
it(`should upgrade a missing metadata file into v${METADATA_VERSION}`, () => {
expect(readMetadata('metadata_versions/v1_empty.d.ts', host)).toEqual([{
__symbolic: 'module',
version: METADATA_VERSION,
metadata: {},
exports: [{from: './lib/utils'}]
}]);
});
it(`should upgrade v3 metadata into v${METADATA_VERSION}`, () => {
expect(readMetadata('metadata_versions/v3.d.ts', host)).toEqual([
{__symbolic: 'module', version: 3, metadata: {foo: {__symbolic: 'class'}}}, {
__symbolic: 'module',
version: METADATA_VERSION,
metadata: {
foo: {__symbolic: 'class'},
aType: {__symbolic: 'interface'},
Bar: {__symbolic: 'class', members: {ngOnInit: [{__symbolic: 'method'}]}},
BarChild: {__symbolic: 'class', extends: {__symbolic: 'reference', name: 'Bar'}},
ReExport: {__symbolic: 'reference', module: './lib/utils2', name: 'ReExport'},
}
// Note: exports is missing because it was elided in the original.
}
]);
});
});
const dummyModule = 'export let foo: any[];';
const dummyMetadata: ModuleMetadata = {
__symbolic: 'module',
version: METADATA_VERSION,
metadata:
{foo: {__symbolic: 'error', message: 'Variable not initialized', line: 0, character: 11}}
};
const FILES: Entry = {
'tmp': {
'src': {
'main.ts': `
import * as c from '@angular/core';
import * as r from '@angular/router';
import * as u from './lib/utils';
import * as cs from './lib/collections';
import * as u2 from './lib2/utils2';
`,
'lib': {
'utils.ts': dummyModule,
'collections.ts': dummyModule,
},
'lib2': {'utils2.ts': dummyModule},
'node_modules': {
'@angular': {
'core.d.ts': dummyModule,
'core.metadata.json':
`{"__symbolic":"module", "version": ${METADATA_VERSION}, "metadata": {"foo": {"__symbolic": "class"}}}`,
'router': {'index.d.ts': dummyModule, 'src': {'providers.d.ts': dummyModule}},
'unused.d.ts': dummyModule,
'empty.d.ts': 'export declare var a: string;',
'empty.metadata.json': '[]',
}
},
'metadata_versions': {
'v1.d.ts': `
import {ReExport} from './lib/utils2';
export {ReExport};
export {Export} from './lib/utils2';
export type aType = number;
export declare class Bar {
ngOnInit() {}
}
export declare class BarChild extends Bar {}
`,
'v1.metadata.json':
`{"__symbolic":"module", "version": 1, "metadata": {"foo": {"__symbolic": "class"}}}`,
'v1_empty.d.ts': `
export * from './lib/utils';
`,
'v3.d.ts': `
import {ReExport} from './lib/utils2';
export {ReExport};
export {Export} from './lib/utils2';
export type aType = number;
export declare class Bar {
ngOnInit() {}
}
export declare class BarChild extends Bar {}
`,
'v3.metadata.json':
`{"__symbolic":"module", "version": 3, "metadata": {"foo": {"__symbolic": "class"}}}`,
}
}
}
};
function clone(entry: Entry): Entry {
if (typeof entry === 'string') {
return entry;
} else {
const result: Directory = {};
for (const name in entry) {
result[name] = clone(entry[name]);
}
return result;
}
}