TypeScript @angular-compiler-src-output-output_ast.importExpr类(方法)实例源码

it('should create a reexport', () => {
   expect(emitStmt(someVar.set(o.importExpr(externalModuleIdentifier))
                       .toDeclStmt(null, [o.StmtModifier.Exported])))
       .toEqual([
         `export {someExternalId as someVar} from 'somePackage/someOtherPath';`, ``
       ].join('\n'));
 });

it('should create multiple reexports from the same file', () => {
   const someVar2 = o.variable('someVar2');
   const externalModuleIdentifier2: CompileIdentifierMetadata = {
     reference: new StaticSymbol(anotherModuleUrl, 'someExternalId2', [])
   };
   expect(emitStmt(
              [
                someVar.set(o.importExpr(externalModuleIdentifier)).toDeclStmt(),
                someVar2.set(o.importExpr(externalModuleIdentifier2)).toDeclStmt()
              ],
              ['someVar', 'someVar2']))
       .toEqual([
         `export {someExternalId as someVar,someExternalId2 as someVar2} from 'somePackage/someOtherPath';`,
         ``
       ].join('\n'));
 });

it('should create no reexport if the variable is typed', () => {
   expect(emitStmt(someVar.set(o.importExpr(externalModuleIdentifier))
                       .toDeclStmt(o.DYNAMIC_TYPE, [o.StmtModifier.Exported])))
       .toEqual([
         `import * as i0 from 'somePackage/someOtherPath';`,
         `export var someVar:any = i0.someExternalId;`
       ].join('\n'));
 });

it('should insert imports after existing imports', () => {
    context = context.override({
      somePackage: {
        'someGenFile.ts': `
        import {Component} from '@angular/core';

        @Component({selector: 'some-class', template: 'hello!'})
        export class SomeClass {}

        export class SomeOtherClass {}
      `
      }
    });
    host = new MockCompilerHost(context);

    expect(emitStaticMethod(new o.ReturnStatement(
               o.importExpr(new o.ExternalReference('@angular/core', 'Component')))))
        .toContain('const core_1 = require("@angular/core"); const i0 = require("@angular/core");');
  });

[o.literalArr([...externalIds1, ...externalIds].map(id => o.importExpr(id))).toStmt()],