export function mergeSourceMaps(
    oldMap: RawSourceMap | null, newMap: RawSourceMap): SourceMapConverter {
  if (!oldMap) {
    return fromObject(newMap);
  }
  const oldMapConsumer = new SourceMapConsumer(oldMap);
  const newMapConsumer = new SourceMapConsumer(newMap);
  const mergedMapGenerator = SourceMapGenerator.fromSourceMap(newMapConsumer);
  mergedMapGenerator.applySourceMap(oldMapConsumer);
  const merged = fromJSON(mergedMapGenerator.toString());
  return merged;
}

  /**
   * Get the map from the source (note whether it is inline or external)
   */
  protected extractSourceMap(file: ts.SourceFile): SourceMapInfo {
    const inline = commentRegex.test(file.text);
    const external = mapFileCommentRegex.test(file.text);

    if (inline) {
      const inlineSourceMap = fromSource(file.text);
      return {
        source: removeComments(file.text).replace(/\n\n$/, '\n'),
        map: inlineSourceMap,
        isInline: true,
      };
    } else if (external) {
      let externalSourceMap: SourceMapConverter|null = null;
      try {
        externalSourceMap = fromMapFileSource(file.text, dirname(file.fileName));
      } catch (e) {
        if (e.code === 'ENOENT') {
          console.warn(
              `The external map file specified in the source code comment "${e.path}" was not found on the file system.`);
          const mapPath = file.fileName + '.map';
          if (basename(e.path) !== basename(mapPath) && statSync(mapPath).isFile()) {
            console.warn(
                `Guessing the map file name from the source file name: "${basename(mapPath)}"`);
            try {
              externalSourceMap = fromObject(JSON.parse(readFileSync(mapPath, 'utf8')));
            } catch (e) {
              console.error(e);
            }
          }
        }
      }
      return {
        source: removeMapFileComments(file.text).replace(/\n\n$/, '\n'),
        map: externalSourceMap,
        isInline: false,
      };
    } else {
      return {source: file.text, map: null, isInline: false};
    }
  }

describe('Renderer', () => {
  const INPUT_PROGRAM = {
    name: '/file.js',
    contents:
        `import { Directive } from '@angular/core';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: '[a]' }] }\n];\n`
  };
  const INPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/file.js',
    'sourceRoot': '',
    'sources': ['/file.ts'],
    'names': [],
    'mappings':
        'AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,eAAe,CAAC;AAC1C,MAAM;IACF,GAAG,CAAC,CAAS;QACT,OAAO,CAAC,CAAC;IACb,CAAC;;AACM,YAAU,GAAG;IAChB,EAAE,IAAI,EAAE,SAAS,EAAE,IAAI,EAAE,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,EAAE;CACnD,CAAC',
    'sourcesContent': [
      'import { Directive } from \'@angular/core\';\nexport class A {\n    foo(x: string): string {\n        return x;\n    }\n    static decorators = [\n        { type: Directive, args: [{ selector: \'[a]\' }] }\n    ];\n}'
    ]
  });
  const RENDERED_CONTENTS =
      `\n// REMOVE DECORATORS\n\n// ADD IMPORTS\n\n// ADD DEFINITIONS\n` + INPUT_PROGRAM.contents;
  const OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/output_file.js',
    'sources': ['/file.js'],
    'sourcesContent': [
      'import { Directive } from \'@angular/core\';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: \'[a]\' }] }\n];\n'
    ],
    'names': [],
    'mappings': ';;;;;;AAAA;;;;;;;;;'
  });

  const MERGED_OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'sources': ['/file.ts'],
    'names': [],
    'mappings': ';;;;;;AAAA',
    'file': '/output_file.js',
    'sourcesContent': [
      'import { Directive } from \'@angular/core\';\nexport class A {\n    foo(x: string): string {\n        return x;\n    }\n    static decorators = [\n        { type: Directive, args: [{ selector: \'[a]\' }] }\n    ];\n}'
    ]
  });

  describe('renderFile()', () => {
    it('should render the modified contents; and a new map file, if the original provided no map file.',
       () => {
         const renderer = createTestRenderer();
         const analyzedFiles = analyze(INPUT_PROGRAM);
         const result = renderer.renderFile(analyzedFiles[0], '/output_file.js');
         expect(result.source.path).toEqual('/output_file.js');
         expect(result.source.contents)
             .toEqual(RENDERED_CONTENTS + '\n' + generateMapFileComment('/output_file.js.map'));
         expect(result.map !.path).toEqual('/output_file.js.map');
         expect(result.map !.contents).toEqual(OUTPUT_PROGRAM_MAP.toJSON());
       });

    it('should call addImports with the source code and info about the core Angular library.',
       () => {
         const renderer = createTestRenderer();
         const analyzedFiles = analyze(INPUT_PROGRAM);
         renderer.renderFile(analyzedFiles[0], '/output_file.js');
         expect(renderer.addImports.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
         expect(renderer.addImports.calls.first().args[1]).toEqual([
           {name: '@angular/core', as: 'ɵngcc0'}
         ]);
       });

    it('should call addDefinitions with the source code, the analyzed class and the renderered definitions.',
       () => {
         const renderer = createTestRenderer();
         const analyzedFile = analyze(INPUT_PROGRAM)[0];
         renderer.renderFile(analyzedFile, '/output_file.js');
         expect(renderer.addDefinitions.calls.first().args[0].toString())
             .toEqual(RENDERED_CONTENTS);
         expect(renderer.addDefinitions.calls.first().args[1])
             .toBe(analyzedFile.analyzedClasses[0]);
         expect(renderer.addDefinitions.calls.first().args[2])
             .toEqual(
                 `A.ngDirectiveDef = ɵngcc0.ɵdefineDirective({ type: A, selectors: [["", "a", ""]], factory: function A_Factory() { return new A(); }, features: [ɵngcc0.ɵPublicFeature] });`);
       });

    it('should call removeDecorators with the source code, a map of class decorators that have been analyzed',
       () => {
         const renderer = createTestRenderer();
         const analyzedFile = analyze(INPUT_PROGRAM)[0];
         renderer.renderFile(analyzedFile, '/output_file.js');
         expect(renderer.removeDecorators.calls.first().args[0].toString())
             .toEqual(RENDERED_CONTENTS);

         // Each map key is the TS node of the decorator container
         // Each map value is an array of TS nodes that are the decorators to remove
         const map = renderer.removeDecorators.calls.first().args[1] as Map<ts.Node, ts.Node[]>;
         const keys = Array.from(map.keys());
         expect(keys.length).toEqual(1);
         expect(keys[0].getText())
             .toEqual(`[\n    { type: Directive, args: [{ selector: '[a]' }] }\n]`);
         const values = Array.from(map.values());
         expect(values.length).toEqual(1);
         expect(values[0].length).toEqual(1);
         expect(values[0][0].getText()).toEqual(`{ type: Directive, args: [{ selector: '[a]' }] }`);
       });
//.........这里部分代码省略.........

describe('Renderer', () => {
  const INPUT_PROGRAM = {
    name: '/src/file.js',
    contents:
        `import { Directive } from '@angular/core';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: '[a]' }] }\n];\n`
  };

  const INPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/src/file.js',
    'sourceRoot': '',
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings':
        'AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,eAAe,CAAC;AAC1C,MAAM;IACF,GAAG,CAAC,CAAS;QACT,OAAO,CAAC,CAAC;IACb,CAAC;;AACM,YAAU,GAAG;IAChB,EAAE,IAAI,EAAE,SAAS,EAAE,IAAI,EAAE,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,EAAE;CACnD,CAAC',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  const RENDERED_CONTENTS =
      `\n// REMOVE DECORATORS\n\n// ADD IMPORTS\n\n// ADD CONSTANTS\n\n// ADD DEFINITIONS\n` +
      INPUT_PROGRAM.contents;

  const OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/dist/file.js',
    'sources': ['/src/file.js'],
    'sourcesContent': [INPUT_PROGRAM.contents],
    'names': [],
    'mappings': ';;;;;;;;AAAA;;;;;;;;;'
  });

  const MERGED_OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings': ';;;;;;;;AAAA',
    'file': '/dist/file.js',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  describe('renderProgram()', () => {
    it('should render the modified contents; and a new map file, if the original provided no map file.',
       () => {
         const {renderer, program, decorationAnalyses, switchMarkerAnalyses} =
             createTestRenderer(INPUT_PROGRAM);
         const result = renderer.renderProgram(program, decorationAnalyses, switchMarkerAnalyses);
         expect(result[0].path).toEqual('/dist/file.js');
         expect(result[0].contents)
             .toEqual(RENDERED_CONTENTS + '\n' + generateMapFileComment('/dist/file.js.map'));
         expect(result[1].path).toEqual('/dist/file.js.map');
         expect(result[1].contents).toEqual(OUTPUT_PROGRAM_MAP.toJSON());
       });

    it('should call addImports with the source code and info about the core Angular library.',
       () => {
         const {decorationAnalyses, program, renderer, switchMarkerAnalyses} =
             createTestRenderer(INPUT_PROGRAM);
         renderer.renderProgram(program, decorationAnalyses, switchMarkerAnalyses);
         const addImportsSpy = renderer.addImports as jasmine.Spy;
         expect(addImportsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
         expect(addImportsSpy.calls.first().args[1]).toEqual([
           {name: '@angular/core', as: 'ɵngcc0'}
         ]);
       });

    it('should call addDefinitions with the source code, the analyzed class and the renderered definitions.',
       () => {
         const {decorationAnalyses, program, renderer, switchMarkerAnalyses} =
             createTestRenderer(INPUT_PROGRAM);
         renderer.renderProgram(program, decorationAnalyses, switchMarkerAnalyses);
         const addDefinitionsSpy = renderer.addDefinitions as jasmine.Spy;
         expect(addDefinitionsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
         expect(addDefinitionsSpy.calls.first().args[1]).toEqual(jasmine.objectContaining({
           name: 'A',
           decorators: [jasmine.objectContaining({name: 'Directive'})],
         }));
         expect(addDefinitionsSpy.calls.first().args[2])
             .toEqual(`/*@__PURE__*/ ɵngcc0.ɵsetClassMetadata(A, [{
        type: Directive,
        args: [{ selector: '[a]' }]
    }], null, { foo: [] });
A.ngDirectiveDef = ɵngcc0.ɵdefineDirective({ type: A, selectors: [["", "a", ""]], factory: function A_Factory(t) { return new (t || A)(); } });`);
       });

    it('should call removeDecorators with the source code, a map of class decorators that have been analyzed',
       () => {
         const {decorationAnalyses, program, renderer, switchMarkerAnalyses} =
             createTestRenderer(INPUT_PROGRAM);
         renderer.renderProgram(program, decorationAnalyses, switchMarkerAnalyses);
         const removeDecoratorsSpy = renderer.removeDecorators as jasmine.Spy;
         expect(removeDecoratorsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);

         // Each map key is the TS node of the decorator container
         // Each map value is an array of TS nodes that are the decorators to remove
         const map = removeDecoratorsSpy.calls.first().args[1] as Map<ts.Node, ts.Node[]>;
         const keys = Array.from(map.keys());
         expect(keys.length).toEqual(1);
         expect(keys[0].getText())
             .toEqual(`[\n    { type: Directive, args: [{ selector: '[a]' }] }\n]`);
         const values = Array.from(map.values());
//.........这里部分代码省略.........

describe('Renderer', () => {
  const INPUT_PROGRAM = {
    name: '/src/file.js',
    contents:
        `import { Directive } from '@angular/core';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: '[a]' }] }\n];\n`
  };
  const INPUT_DTS_PROGRAM = {
    name: '/typings/file.d.ts',
    contents: `export declare class A {\nfoo(x: number): number;\n}\n`
  };

  const COMPONENT_PROGRAM = {
    name: '/src/component.js',
    contents:
        `import { Component } from '@angular/core';\nexport class A {}\nA.decorators = [\n    { type: Component, args: [{ selector: 'a', template: '{{ person!.name }}' }] }\n];\n`
  };

  const INPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/src/file.js',
    'sourceRoot': '',
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings':
        'AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,eAAe,CAAC;AAC1C,MAAM;IACF,GAAG,CAAC,CAAS;QACT,OAAO,CAAC,CAAC;IACb,CAAC;;AACM,YAAU,GAAG;IAChB,EAAE,IAAI,EAAE,SAAS,EAAE,IAAI,EAAE,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,EAAE;CACnD,CAAC',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  const RENDERED_CONTENTS =
      `\n// ADD EXPORTS\n\n// ADD IMPORTS\n\n// ADD CONSTANTS\n\n// ADD DEFINITIONS\n\n// REMOVE DECORATORS\n` +
      INPUT_PROGRAM.contents;

  const OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': 'file.js',
    'sources': ['/src/file.js'],
    'sourcesContent': [INPUT_PROGRAM.contents],
    'names': [],
    'mappings': ';;;;;;;;;;AAAA;;;;;;;;;'
  });

  const MERGED_OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings': ';;;;;;;;;;AAAA',
    'file': 'file.js',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  describe('renderProgram()', () => {
    it('should render the modified contents; and a new map file, if the original provided no map file.',
       () => {
         const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
                moduleWithProvidersAnalyses} = createTestRenderer('test-package', [INPUT_PROGRAM]);
         const result = renderer.renderProgram(
             decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
             moduleWithProvidersAnalyses);
         expect(result[0].path).toEqual('/src/file.js');
         expect(result[0].contents)
             .toEqual(RENDERED_CONTENTS + '\n' + generateMapFileComment('file.js.map'));
         expect(result[1].path).toEqual('/src/file.js.map');
         expect(result[1].contents).toEqual(OUTPUT_PROGRAM_MAP.toJSON());
       });


    it('should render as JavaScript', () => {
      const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
             moduleWithProvidersAnalyses} = createTestRenderer('test-package', [COMPONENT_PROGRAM]);
      renderer.renderProgram(
          decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
          moduleWithProvidersAnalyses);
      const addDefinitionsSpy = renderer.addDefinitions as jasmine.Spy;
      expect(addDefinitionsSpy.calls.first().args[2])
          .toEqual(`/*@__PURE__*/ ɵngcc0.ɵsetClassMetadata(A, [{
        type: Component,
        args: [{ selector: 'a', template: '{{ person!.name }}' }]
    }], null, null);
A.ngComponentDef = ɵngcc0.ɵdefineComponent({ type: A, selectors: [["a"]], factory: function A_Factory(t) { return new (t || A)(); }, consts: 1, vars: 1, template: function A_Template(rf, ctx) { if (rf & 1) {
        ɵngcc0.ɵtext(0);
    } if (rf & 2) {
        ɵngcc0.ɵselect(0);
        ɵngcc0.ɵtextBinding(0, ɵngcc0.ɵinterpolation1("", ctx.person.name, ""));
    } }, encapsulation: 2 });`);
    });


    describe('calling abstract methods', () => {
      it('should call addImports with the source code and info about the core Angular library.',
         () => {
           const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
                  moduleWithProvidersAnalyses} =
               createTestRenderer('test-package', [INPUT_PROGRAM]);
           const result = renderer.renderProgram(
               decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
               moduleWithProvidersAnalyses);
           const addImportsSpy = renderer.addImports as jasmine.Spy;
           expect(addImportsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
           expect(addImportsSpy.calls.first().args[1]).toEqual([
             {specifier: '@angular/core', qualifier: 'ɵngcc0'}
//.........这里部分代码省略.........

describe('Renderer', () => {
  const INPUT_PROGRAM = {
    name: '/src/file.js',
    contents:
        `import { Directive } from '@angular/core';\nexport class A {\n    foo(x) {\n        return x;\n    }\n}\nA.decorators = [\n    { type: Directive, args: [{ selector: '[a]' }] }\n];\n`
  };
  const INPUT_DTS_PROGRAM = {
    name: '/typings/file.d.ts',
    contents: `export declare class A {\nfoo(x: number): number;\n}\n`
  };

  const INPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/src/file.js',
    'sourceRoot': '',
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings':
        'AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,eAAe,CAAC;AAC1C,MAAM;IACF,GAAG,CAAC,CAAS;QACT,OAAO,CAAC,CAAC;IACb,CAAC;;AACM,YAAU,GAAG;IAChB,EAAE,IAAI,EAAE,SAAS,EAAE,IAAI,EAAE,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,EAAE;CACnD,CAAC',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  const RENDERED_CONTENTS =
      `\n// ADD EXPORTS\n\n// REMOVE DECORATORS\n\n// ADD IMPORTS\n\n// ADD CONSTANTS\n\n// ADD DEFINITIONS\n` +
      INPUT_PROGRAM.contents;

  const OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'file': '/dist/file.js',
    'sources': ['/src/file.js'],
    'sourcesContent': [INPUT_PROGRAM.contents],
    'names': [],
    'mappings': ';;;;;;;;;;AAAA;;;;;;;;;'
  });

  const MERGED_OUTPUT_PROGRAM_MAP = fromObject({
    'version': 3,
    'sources': ['/src/file.ts'],
    'names': [],
    'mappings': ';;;;;;;;;;AAAA',
    'file': '/dist/file.js',
    'sourcesContent': [INPUT_PROGRAM.contents]
  });

  describe('renderProgram()', () => {
    it('should render the modified contents; and a new map file, if the original provided no map file.',
       () => {
         const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses} =
             createTestRenderer('test-package', [INPUT_PROGRAM]);
         const result = renderer.renderProgram(
             decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses);
         expect(result[0].path).toEqual('/dist/file.js');
         expect(result[0].contents)
             .toEqual(RENDERED_CONTENTS + '\n' + generateMapFileComment('/dist/file.js.map'));
         expect(result[1].path).toEqual('/dist/file.js.map');
         expect(result[1].contents).toEqual(OUTPUT_PROGRAM_MAP.toJSON());
       });

    describe('calling abstract methods', () => {
      it('should call addImports with the source code and info about the core Angular library.',
         () => {
           const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses} =
               createTestRenderer('test-package', [INPUT_PROGRAM]);
           const result = renderer.renderProgram(
               decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses);
           const addImportsSpy = renderer.addImports as jasmine.Spy;
           expect(addImportsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
           expect(addImportsSpy.calls.first().args[1]).toEqual([
             {name: '@angular/core', as: 'ɵngcc0'}
           ]);
         });

      it('should call addDefinitions with the source code, the analyzed class and the rendered definitions.',
         () => {
           const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses} =
               createTestRenderer('test-package', [INPUT_PROGRAM]);
           const result = renderer.renderProgram(
               decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses);
           const addDefinitionsSpy = renderer.addDefinitions as jasmine.Spy;
           expect(addDefinitionsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
           expect(addDefinitionsSpy.calls.first().args[1]).toEqual(jasmine.objectContaining({
             name: 'A',
             decorators: [jasmine.objectContaining({name: 'Directive'})],
           }));
           expect(addDefinitionsSpy.calls.first().args[2])
               .toEqual(`/*@__PURE__*/ ɵngcc0.ɵsetClassMetadata(A, [{
        type: Directive,
        args: [{ selector: '[a]' }]
    }], null, { foo: [] });
A.ngDirectiveDef = ɵngcc0.ɵdefineDirective({ type: A, selectors: [["", "a", ""]], factory: function A_Factory(t) { return new (t || A)(); } });`);
         });

      it('should call removeDecorators with the source code, a map of class decorators that have been analyzed',
         () => {
           const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses} =
               createTestRenderer('test-package', [INPUT_PROGRAM]);
           const result = renderer.renderProgram(
               decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses);
           const removeDecoratorsSpy = renderer.removeDecorators as jasmine.Spy;
           expect(removeDecoratorsSpy.calls.first().args[0].toString()).toEqual(RENDERED_CONTENTS);
//.........这里部分代码省略.........