angular-docs-cn/packages/compiler/test/output/abstract_emitter_node_only_...

141 lines
5.0 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 {ParseLocation, ParseSourceFile, ParseSourceSpan} from '@angular/compiler';
import {EmitterVisitorContext} from '@angular/compiler/src/output/abstract_emitter';
import {SourceMap} from '@angular/compiler/src/output/source_map';
import {extractSourceMap, originalPositionFor} from './source_map_util';
export function main() {
describe('AbstractEmitter', () => {
describe('EmitterVisitorContext', () => {
const fileA = new ParseSourceFile('a0a1a2a3a4a5a6a7a8a9', 'a.js');
const fileB = new ParseSourceFile('b0b1b2b3b4b5b6b7b8b9', 'b.js');
let ctx: EmitterVisitorContext;
beforeEach(() => { ctx = EmitterVisitorContext.createRoot([]); });
it('should add source files to the source map', () => {
ctx.print(createSourceSpan(fileA, 0), 'o0');
ctx.print(createSourceSpan(fileA, 1), 'o1');
ctx.print(createSourceSpan(fileB, 0), 'o2');
ctx.print(createSourceSpan(fileB, 1), 'o3');
const sm = ctx.toSourceMapGenerator('o.ts', 'o.js').toJSON() !;
expect(sm.sources).toEqual([fileA.url, fileB.url]);
expect(sm.sourcesContent).toEqual([fileA.content, fileB.content]);
});
it('should generate a valid mapping', () => {
ctx.print(createSourceSpan(fileA, 0), 'fileA-0');
ctx.println(createSourceSpan(fileB, 1), 'fileB-1');
ctx.print(createSourceSpan(fileA, 2), 'fileA-2');
expectMap(ctx, 0, 0, 'a.js', 0, 0);
expectMap(ctx, 0, 7, 'b.js', 0, 2);
expectMap(ctx, 1, 0, 'a.js', 0, 4);
});
it('should be able to shift the content', () => {
ctx.print(createSourceSpan(fileA, 0), 'fileA-0');
const sm = ctx.toSourceMapGenerator('o.ts', 'o.js', 10).toJSON() !;
expect(originalPositionFor(sm, {line: 11, column: 0})).toEqual({
line: 1,
column: 0,
source: 'a.js',
});
});
it('should use the default source file for the first character', () => {
ctx.print(null, 'fileA-0');
expectMap(ctx, 0, 0, 'o.ts', 0, 0);
});
it('should use an explicit mapping for the first character', () => {
ctx.print(createSourceSpan(fileA, 0), 'fileA-0');
expectMap(ctx, 0, 0, 'a.js', 0, 0);
});
it('should map leading segment without span', () => {
ctx.print(null, '....');
ctx.print(createSourceSpan(fileA, 0), 'fileA-0');
expectMap(ctx, 0, 0, 'o.ts', 0, 0);
expectMap(ctx, 0, 4, 'a.js', 0, 0);
expect(nbSegmentsPerLine(ctx)).toEqual([2]);
});
it('should handle indent', () => {
ctx.incIndent();
ctx.println(createSourceSpan(fileA, 0), 'fileA-0');
ctx.incIndent();
ctx.println(createSourceSpan(fileA, 1), 'fileA-1');
ctx.decIndent();
ctx.println(createSourceSpan(fileA, 2), 'fileA-2');
expectMap(ctx, 0, 0, 'o.ts', 0, 0);
expectMap(ctx, 0, 2, 'a.js', 0, 0);
expectMap(ctx, 1, 0);
expectMap(ctx, 1, 2);
expectMap(ctx, 1, 4, 'a.js', 0, 2);
expectMap(ctx, 2, 0);
expectMap(ctx, 2, 2, 'a.js', 0, 4);
expect(nbSegmentsPerLine(ctx)).toEqual([2, 1, 1]);
});
it('should coalesce identical span', () => {
const span = createSourceSpan(fileA, 0);
ctx.print(span, 'fileA-0');
ctx.print(null, '...');
ctx.print(span, 'fileA-0');
ctx.print(createSourceSpan(fileB, 0), 'fileB-0');
expectMap(ctx, 0, 0, 'a.js', 0, 0);
expectMap(ctx, 0, 7, 'a.js', 0, 0);
expectMap(ctx, 0, 10, 'a.js', 0, 0);
expectMap(ctx, 0, 17, 'b.js', 0, 0);
expect(nbSegmentsPerLine(ctx)).toEqual([2]);
});
});
});
}
// All lines / columns indexes are 0-based
// Note: source-map line indexes are 1-based, column 0-based
function expectMap(
ctx: EmitterVisitorContext, genLine: number, genCol: number, source: string | null = null,
srcLine: number | null = null, srcCol: number | null = null) {
const sm = ctx.toSourceMapGenerator('o.ts', 'o.js').toJSON() !;
const genPosition = {line: genLine + 1, column: genCol};
const origPosition = originalPositionFor(sm, genPosition);
expect(origPosition.source).toEqual(source);
expect(origPosition.line).toEqual(srcLine === null ? null : srcLine + 1);
expect(origPosition.column).toEqual(srcCol);
}
// returns the number of segments per line
function nbSegmentsPerLine(ctx: EmitterVisitorContext) {
const sm = ctx.toSourceMapGenerator('o.ts', 'o.js').toJSON() !;
const lines = sm.mappings.split(';');
return lines.map(l => {
const m = l.match(/,/g);
return m === null ? 1 : m.length + 1;
});
}
function createSourceSpan(file: ParseSourceFile, idx: number) {
const col = 2 * idx;
const start = new ParseLocation(file, col, 0, col);
const end = new ParseLocation(file, col + 2, 0, col + 2);
const sourceSpan = new ParseSourceSpan(start, end);
return {sourceSpan};
}