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

it('should read and write variables', () => {
   expect(emitStmt(someVar.toStmt())).toEqual(`someVar;`);
   expect(emitStmt(someVar.set(o.literal(1)).toStmt())).toEqual(`someVar = 1;`);
   expect(emitStmt(someVar.set(o.variable('someOtherVar').set(o.literal(1))).toStmt()))
       .toEqual(`someVar = (someOtherVar = 1);`);
 });

it('should support a preamble', () => {
   expect(emitStmt(o.variable('a').toStmt(), '/* SomePreamble */')).toBe([
     '/* SomePreamble */', 'a;'
   ].join('\n'));
 });

beforeEach(() => {
   emitter = new TypeScriptEmitter(new SimpleJsImportGenerator());
   someVar = o.variable('someVar');
 });

beforeEach(() => {
   emitter = new TypeScriptEmitter();
   someVar = o.variable('someVar', null, null);
 });

it('should support expressions with type parameters', () => {
   expect(emitStmt(o.variable('a')
                       .set(o.NULL_EXPR)
                       .toDeclStmt(o.importType(externalModuleIdentifier, [o.STRING_TYPE]))))
       .toEqual(`var a = null;`);
 });

beforeEach(() => {
   emitter = new JavaScriptEmitter();
   someVar = o.variable('someVar');
 });

beforeEach(() => {
   importResolver = new SimpleJsImportGenerator();
   emitter = new JavaScriptEmitter(importResolver);
   someVar = o.variable('someVar');
 });

runtime: ViewType.HOST
};

const baseErrorIdentifier = {
  name: 'BaseError',
  moduleUrl: assetUrl('core', 'facade/errors'),
  runtime: BaseError
};

export const codegenExportsVars = [
  'getExpressions',
];


const _getExpressionsStmts: o.Statement[] = [
  o.variable('readVar').set(o.literal('someValue')).toDeclStmt(),

  o.variable('changedVar').set(o.literal('initialValue')).toDeclStmt(),
  o.variable('changedVar').set(o.literal('changedValue')).toStmt(),

  o.variable('map')
      .set(o.literalMap([
        ['someKey', o.literal('someValue')],
        ['changeable', o.literal('initialValue')],
      ]))
      .toDeclStmt(),
  o.variable('map').key(o.literal('changeable')).set(o.literal('changedValue')).toStmt(),

  o.variable('externalInstance')
      .set(o.importExpr(createIdentifier(testDataIdentifier)).instantiate([o.literal('someValue')]))
      .toDeclStmt(),