228 lines
9.0 KiB
TypeScript
228 lines
9.0 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {encode} from 'sourcemap-codec';
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import {FileSystem, absoluteFrom, getFileSystem} from '../../../src/ngtsc/file_system';
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import {runInEachFileSystem} from '../../../src/ngtsc/file_system/testing';
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import {RawSourceMap} from '../../src/sourcemaps/raw_source_map';
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import {SourceFile, computeLineLengths, extractOriginalSegments, parseMappings} from '../../src/sourcemaps/source_file';
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runInEachFileSystem(() => {
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describe('SourceFile and utilities', () => {
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let fs: FileSystem;
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let _: typeof absoluteFrom;
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beforeEach(() => {
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fs = getFileSystem();
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_ = absoluteFrom;
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});
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describe('parseMappings()', () => {
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it('should be an empty array for source files with no source map', () => {
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const mappings = parseMappings(null, []);
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expect(mappings).toEqual([]);
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});
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it('should be empty array for source files with no source map mappings', () => {
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const rawSourceMap: RawSourceMap = {mappings: '', names: [], sources: [], version: 3};
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const mappings = parseMappings(rawSourceMap, []);
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expect(mappings).toEqual([]);
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});
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it('should parse the mappings from the raw source map', () => {
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const rawSourceMap: RawSourceMap = {
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mappings: encode([[[0, 0, 0, 0], [6, 0, 0, 3]]]),
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names: [],
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sources: ['a.js'],
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version: 3
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};
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const originalSource = new SourceFile(_('/foo/src/a.js'), 'abcdefg', null, false, []);
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const mappings = parseMappings(rawSourceMap, [originalSource]);
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expect(mappings).toEqual([
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{
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generatedSegment: {line: 0, column: 0},
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originalSource,
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originalSegment: {line: 0, column: 0},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 6},
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originalSource,
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originalSegment: {line: 0, column: 3},
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name: undefined
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},
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]);
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});
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});
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describe('extractOriginalSegments()', () => {
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it('should return an empty array for source files with no source map',
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() => { expect(extractOriginalSegments(parseMappings(null, []))).toEqual([]); });
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it('should be empty array for source files with no source map mappings', () => {
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const rawSourceMap: RawSourceMap = {mappings: '', names: [], sources: [], version: 3};
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expect(extractOriginalSegments(parseMappings(rawSourceMap, []))).toEqual([]);
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});
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it('should parse the segments in ascending order of original position from the raw source map',
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() => {
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const originalSource = new SourceFile(_('/foo/src/a.js'), 'abcdefg', null, false, []);
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const rawSourceMap: RawSourceMap = {
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mappings: encode([[[0, 0, 0, 0], [2, 0, 0, 3], [4, 0, 0, 2]]]),
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names: [],
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sources: ['a.js'],
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version: 3
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};
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expect(extractOriginalSegments(parseMappings(rawSourceMap, [originalSource]))).toEqual([
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{line: 0, column: 0},
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{line: 0, column: 2},
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{line: 0, column: 3},
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]);
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});
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});
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describe('SourceFile', () => {
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describe('flattenedMappings', () => {
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it('should be an empty array for source files with no source map', () => {
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const sourceFile =
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new SourceFile(_('/foo/src/index.js'), 'index contents', null, false, []);
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expect(sourceFile.flattenedMappings).toEqual([]);
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});
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it('should be empty array for source files with no source map mappings', () => {
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const rawSourceMap: RawSourceMap = {mappings: '', names: [], sources: [], version: 3};
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const sourceFile =
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new SourceFile(_('/foo/src/index.js'), 'index contents', rawSourceMap, false, []);
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expect(sourceFile.flattenedMappings).toEqual([]);
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});
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it('should be the same as non-flat mappings if there is only one level of source map',
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() => {
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const rawSourceMap: RawSourceMap = {
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mappings: encode([[[0, 0, 0, 0], [6, 0, 0, 3]]]),
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names: [],
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sources: ['a.js'],
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version: 3
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};
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const originalSource = new SourceFile(_('/foo/src/a.js'), 'abcdefg', null, false, []);
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const sourceFile = new SourceFile(
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_('/foo/src/index.js'), 'abc123defg', rawSourceMap, false, [originalSource]);
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expect(sourceFile.flattenedMappings)
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.toEqual(parseMappings(rawSourceMap, [originalSource]));
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});
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it('should merge mappings from flattened original source files', () => {
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const cSource = new SourceFile(_('/foo/src/c.js'), 'bcd123e', null, false, []);
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const bSourceMap: RawSourceMap = {
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mappings: encode([[[1, 0, 0, 0], [4, 0, 0, 3], [4, 0, 0, 6], [5, 0, 0, 7]]]),
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names: [],
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sources: ['c.js'],
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version: 3
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};
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const bSource =
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new SourceFile(_('/foo/src/b.js'), 'abcdef', bSourceMap, false, [cSource]);
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const aSourceMap: RawSourceMap = {
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mappings: encode([[[0, 0, 0, 0], [2, 0, 0, 3], [4, 0, 0, 2], [5, 0, 0, 5]]]),
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names: [],
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sources: ['b.js'],
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version: 3
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};
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const aSource =
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new SourceFile(_('/foo/src/a.js'), 'abdecf', aSourceMap, false, [bSource]);
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expect(aSource.flattenedMappings).toEqual([
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{
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generatedSegment: {line: 0, column: 1},
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originalSource: cSource,
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originalSegment: {line: 0, column: 0},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 2},
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originalSource: cSource,
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originalSegment: {line: 0, column: 2},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 3},
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originalSource: cSource,
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originalSegment: {line: 0, column: 3},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 3},
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originalSource: cSource,
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originalSegment: {line: 0, column: 6},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 4},
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originalSource: cSource,
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originalSegment: {line: 0, column: 1},
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name: undefined
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},
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{
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generatedSegment: {line: 0, column: 5},
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originalSource: cSource,
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originalSegment: {line: 0, column: 7},
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name: undefined
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},
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]);
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});
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});
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describe('renderFlattenedSourceMap()', () => {
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it('should convert the flattenedMappings into a raw source-map object', () => {
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const cSource = new SourceFile(_('/foo/src/c.js'), 'bcd123e', null, false, []);
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const bToCSourceMap: RawSourceMap = {
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mappings: encode([[[1, 0, 0, 0], [4, 0, 0, 3], [4, 0, 0, 6], [5, 0, 0, 7]]]),
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names: [],
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sources: ['c.js'],
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version: 3
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};
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const bSource =
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new SourceFile(_('/foo/src/b.js'), 'abcdef', bToCSourceMap, false, [cSource]);
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const aToBSourceMap: RawSourceMap = {
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mappings: encode([[[0, 0, 0, 0], [2, 0, 0, 3], [4, 0, 0, 2], [5, 0, 0, 5]]]),
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names: [],
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sources: ['b.js'],
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version: 3
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};
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const aSource =
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new SourceFile(_('/foo/src/a.js'), 'abdecf', aToBSourceMap, false, [bSource]);
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const aTocSourceMap = aSource.renderFlattenedSourceMap();
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expect(aTocSourceMap.version).toEqual(3);
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expect(aTocSourceMap.file).toEqual('a.js');
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expect(aTocSourceMap.names).toEqual([]);
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expect(aTocSourceMap.sourceRoot).toBeUndefined();
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expect(aTocSourceMap.sources).toEqual(['c.js']);
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expect(aTocSourceMap.sourcesContent).toEqual(['bcd123e']);
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expect(aTocSourceMap.mappings).toEqual(encode([
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[[1, 0, 0, 0], [2, 0, 0, 2], [3, 0, 0, 3], [3, 0, 0, 6], [4, 0, 0, 1], [5, 0, 0, 7]]
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]));
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});
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});
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});
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describe('computeLineLengths()', () => {
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it('should compute the length of each line in the given string', () => {
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expect(computeLineLengths('')).toEqual([0]);
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expect(computeLineLengths('abc')).toEqual([3]);
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expect(computeLineLengths('\n')).toEqual([0, 0]);
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expect(computeLineLengths('\n\n')).toEqual([0, 0, 0]);
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expect(computeLineLengths('abc\n')).toEqual([3, 0]);
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expect(computeLineLengths('\nabc')).toEqual([0, 3]);
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expect(computeLineLengths('abc\ndefg')).toEqual([3, 4]);
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expect(computeLineLengths('abc\r\n')).toEqual([3, 0]);
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expect(computeLineLengths('abc\r\ndefg')).toEqual([3, 4]);
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});
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});
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});
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});
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