285 lines
13 KiB
TypeScript
285 lines
13 KiB
TypeScript
/**
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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 {CompileIdentifierMetadata} from '@angular/compiler/src/compile_metadata';
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import {JavaScriptEmitter} from '@angular/compiler/src/output/js_emitter';
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import * as o from '@angular/compiler/src/output/output_ast';
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import {beforeEach, describe, expect, it} from '@angular/core/testing/testing_internal';
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import {SimpleJsImportGenerator} from './output_emitter_util';
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const someModuleUrl = 'somePackage/somePath';
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const anotherModuleUrl = 'somePackage/someOtherPath';
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const sameModuleIdentifier =
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new CompileIdentifierMetadata({name: 'someLocalId', moduleUrl: someModuleUrl});
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const externalModuleIdentifier =
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new CompileIdentifierMetadata({name: 'someExternalId', moduleUrl: anotherModuleUrl});
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export function main() {
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// Note supported features of our OutputAstin JavaScript / ES5:
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// - types
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// - declaring fields
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describe('JavaScriptEmitter', () => {
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let emitter: JavaScriptEmitter;
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let someVar: o.ReadVarExpr;
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beforeEach(() => {
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emitter = new JavaScriptEmitter(new SimpleJsImportGenerator());
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someVar = o.variable('someVar');
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});
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function emitStmt(stmt: o.Statement, exportedVars: string[] = null): string {
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if (!exportedVars) {
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exportedVars = [];
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}
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return emitter.emitStatements(someModuleUrl, [stmt], exportedVars);
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}
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it('should declare variables', () => {
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt())).toEqual(`var someVar = 1;`);
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(), ['someVar'])).toEqual([
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'var someVar = 1;',
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`Object.defineProperty(exports, 'someVar', { get: function() { return someVar; }});`
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].join('\n'));
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});
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it('should read and write variables', () => {
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expect(emitStmt(someVar.toStmt())).toEqual(`someVar;`);
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expect(emitStmt(someVar.set(o.literal(1)).toStmt())).toEqual(`someVar = 1;`);
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expect(emitStmt(someVar.set(o.variable('someOtherVar').set(o.literal(1))).toStmt()))
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.toEqual(`someVar = (someOtherVar = 1);`);
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});
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it('should read and write keys', () => {
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expect(emitStmt(o.variable('someMap').key(o.variable('someKey')).toStmt()))
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.toEqual(`someMap[someKey];`);
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expect(emitStmt(o.variable('someMap').key(o.variable('someKey')).set(o.literal(1)).toStmt()))
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.toEqual(`someMap[someKey] = 1;`);
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});
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it('should read and write properties', () => {
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expect(emitStmt(o.variable('someObj').prop('someProp').toStmt()))
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.toEqual(`someObj.someProp;`);
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expect(emitStmt(o.variable('someObj').prop('someProp').set(o.literal(1)).toStmt()))
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.toEqual(`someObj.someProp = 1;`);
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});
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it('should invoke functions and methods and constructors', () => {
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expect(emitStmt(o.variable('someFn').callFn([o.literal(1)]).toStmt())).toEqual('someFn(1);');
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expect(emitStmt(o.variable('someObj').callMethod('someMethod', [o.literal(1)]).toStmt()))
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.toEqual('someObj.someMethod(1);');
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expect(emitStmt(o.variable('SomeClass').instantiate([o.literal(1)]).toStmt()))
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.toEqual('new SomeClass(1);');
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});
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it('should support builtin methods', () => {
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expect(emitStmt(o.variable('arr1')
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.callMethod(o.BuiltinMethod.ConcatArray, [o.variable('arr2')])
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.toStmt()))
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.toEqual('arr1.concat(arr2);');
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expect(emitStmt(o.variable('observable')
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.callMethod(o.BuiltinMethod.SubscribeObservable, [o.variable('listener')])
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.toStmt()))
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.toEqual('observable.subscribe(listener);');
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expect(
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emitStmt(
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o.variable('fn').callMethod(o.BuiltinMethod.Bind, [o.variable('someObj')]).toStmt()))
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.toEqual('fn.bind(someObj);');
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});
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it('should support literals', () => {
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expect(emitStmt(o.literal(0).toStmt())).toEqual('0;');
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expect(emitStmt(o.literal(true).toStmt())).toEqual('true;');
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expect(emitStmt(o.literal('someStr').toStmt())).toEqual(`'someStr';`);
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expect(emitStmt(o.literalArr([o.literal(1)]).toStmt())).toEqual(`[1];`);
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expect(emitStmt(o.literalMap([['someKey', o.literal(1)]]).toStmt())).toEqual(`{someKey: 1};`);
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});
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it('should support blank literals', () => {
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expect(emitStmt(o.literal(null).toStmt())).toEqual('null;');
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expect(emitStmt(o.literal(undefined).toStmt())).toEqual('undefined;');
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});
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it('should support external identifiers', () => {
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expect(emitStmt(o.importExpr(sameModuleIdentifier).toStmt())).toEqual('someLocalId;');
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expect(emitStmt(o.importExpr(externalModuleIdentifier).toStmt())).toEqual([
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`var import0 = re` +
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`quire('somePackage/someOtherPath');`,
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`import0.someExternalId;`
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].join('\n'));
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});
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it('should support operators', () => {
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const lhs = o.variable('lhs');
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const rhs = o.variable('rhs');
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expect(emitStmt(o.not(someVar).toStmt())).toEqual('!someVar;');
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expect(
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emitStmt(someVar.conditional(o.variable('trueCase'), o.variable('falseCase')).toStmt()))
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.toEqual('(someVar? trueCase: falseCase);');
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expect(emitStmt(lhs.equals(rhs).toStmt())).toEqual('(lhs == rhs);');
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expect(emitStmt(lhs.notEquals(rhs).toStmt())).toEqual('(lhs != rhs);');
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expect(emitStmt(lhs.identical(rhs).toStmt())).toEqual('(lhs === rhs);');
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expect(emitStmt(lhs.notIdentical(rhs).toStmt())).toEqual('(lhs !== rhs);');
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expect(emitStmt(lhs.minus(rhs).toStmt())).toEqual('(lhs - rhs);');
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expect(emitStmt(lhs.plus(rhs).toStmt())).toEqual('(lhs + rhs);');
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expect(emitStmt(lhs.divide(rhs).toStmt())).toEqual('(lhs / rhs);');
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expect(emitStmt(lhs.multiply(rhs).toStmt())).toEqual('(lhs * rhs);');
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expect(emitStmt(lhs.modulo(rhs).toStmt())).toEqual('(lhs % rhs);');
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expect(emitStmt(lhs.and(rhs).toStmt())).toEqual('(lhs && rhs);');
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expect(emitStmt(lhs.or(rhs).toStmt())).toEqual('(lhs || rhs);');
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expect(emitStmt(lhs.lower(rhs).toStmt())).toEqual('(lhs < rhs);');
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expect(emitStmt(lhs.lowerEquals(rhs).toStmt())).toEqual('(lhs <= rhs);');
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expect(emitStmt(lhs.bigger(rhs).toStmt())).toEqual('(lhs > rhs);');
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expect(emitStmt(lhs.biggerEquals(rhs).toStmt())).toEqual('(lhs >= rhs);');
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});
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it('should support function expressions', () => {
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expect(emitStmt(o.fn([], []).toStmt())).toEqual(['function() {', '};'].join('\n'));
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expect(emitStmt(o.fn([], [new o.ReturnStatement(o.literal(1))]).toStmt())).toEqual([
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'function() {', ' return 1;\n};'
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].join('\n'));
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expect(emitStmt(o.fn([new o.FnParam('param1')], []).toStmt())).toEqual([
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'function(param1) {', '};'
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].join('\n'));
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});
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it('should support function statements', () => {
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [], [
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]))).toEqual(['function someFn() {', '}'].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [], []), ['someFn'])).toEqual([
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'function someFn() {', '}',
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`Object.defineProperty(exports, 'someFn', { get: function() { return someFn; }});`
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].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [], [
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new o.ReturnStatement(o.literal(1))
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]))).toEqual(['function someFn() {', ' return 1;', '}'].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [new o.FnParam('param1')], [
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]))).toEqual(['function someFn(param1) {', '}'].join('\n'));
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});
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it('should support comments', () => {
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expect(emitStmt(new o.CommentStmt('a\nb'))).toEqual(['// a', '// b'].join('\n'));
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});
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it('should support if stmt', () => {
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const trueCase = o.variable('trueCase').callFn([]).toStmt();
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const falseCase = o.variable('falseCase').callFn([]).toStmt();
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expect(emitStmt(new o.IfStmt(o.variable('cond'), [trueCase]))).toEqual([
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'if (cond) { trueCase(); }'
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].join('\n'));
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expect(emitStmt(new o.IfStmt(o.variable('cond'), [trueCase], [falseCase]))).toEqual([
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'if (cond) {', ' trueCase();', '} else {', ' falseCase();', '}'
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].join('\n'));
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});
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it('should support try/catch', () => {
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const bodyStmt = o.variable('body').callFn([]).toStmt();
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const catchStmt =
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o.variable('catchFn').callFn([o.CATCH_ERROR_VAR, o.CATCH_STACK_VAR]).toStmt();
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expect(emitStmt(new o.TryCatchStmt([bodyStmt], [catchStmt]))).toEqual([
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'try {', ' body();', '} catch (error) {', ' var stack = error.stack;',
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' catchFn(error,stack);', '}'
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].join('\n'));
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});
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it('should support support throwing',
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() => { expect(emitStmt(new o.ThrowStmt(someVar))).toEqual('throw someVar;'); });
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describe('classes', () => {
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let callSomeMethod: o.Statement;
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beforeEach(() => { callSomeMethod = o.THIS_EXPR.callMethod('someMethod', []).toStmt(); });
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it('should support declaring classes', () => {
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expect(emitStmt(new o.ClassStmt('SomeClass', null, [], [], null, [
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]))).toEqual(['function SomeClass() {', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt('SomeClass', null, [], [], null, []), ['SomeClass']))
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.toEqual([
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'function SomeClass() {', '}',
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`Object.defineProperty(exports, 'SomeClass', { get: function() { return SomeClass; }});`
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].join('\n'));
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expect(
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emitStmt(new o.ClassStmt('SomeClass', o.variable('SomeSuperClass'), [], [], null, [])))
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.toEqual([
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'function SomeClass() {', '}',
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'SomeClass.prototype = Object.create(SomeSuperClass.prototype);'
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].join('\n'));
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});
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it('should support declaring constructors', () => {
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const superCall = o.SUPER_EXPR.callFn([o.variable('someParam')]).toStmt();
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expect(emitStmt(
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new o.ClassStmt('SomeClass', null, [], [], new o.ClassMethod(null, [], []), [])))
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.toEqual(['function SomeClass() {', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [],
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new o.ClassMethod(null, [new o.FnParam('someParam')], []), [])))
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.toEqual(['function SomeClass(someParam) {', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', o.variable('SomeSuperClass'), [], [],
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new o.ClassMethod(null, [], [superCall]), [])))
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.toEqual([
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'function SomeClass() {', ' var self = this;',
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' SomeSuperClass.call(this, someParam);', '}',
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'SomeClass.prototype = Object.create(SomeSuperClass.prototype);'
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].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [], new o.ClassMethod(null, [], [callSomeMethod]), [])))
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.toEqual([
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'function SomeClass() {', ' var self = this;', ' self.someMethod();', '}'
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].join('\n'));
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});
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it('should support declaring getters', () => {
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [new o.ClassGetter('someGetter', [])], null, [])))
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.toEqual([
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'function SomeClass() {', '}',
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`Object.defineProperty(SomeClass.prototype, 'someGetter', { get: function() {`, `}});`
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].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [new o.ClassGetter('someGetter', [callSomeMethod])], null,
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[])))
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.toEqual([
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'function SomeClass() {', '}',
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`Object.defineProperty(SomeClass.prototype, 'someGetter', { get: function() {`,
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` var self = this;`, ` self.someMethod();`, `}});`
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].join('\n'));
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});
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it('should support methods', () => {
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [], null, [new o.ClassMethod('someMethod', [], [])])))
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.toEqual([
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'function SomeClass() {', '}', 'SomeClass.prototype.someMethod = function() {', '};'
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].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [], null,
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[new o.ClassMethod('someMethod', [new o.FnParam('someParam')], [])])))
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.toEqual([
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'function SomeClass() {', '}',
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'SomeClass.prototype.someMethod = function(someParam) {', '};'
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].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null, [], [], null,
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[new o.ClassMethod('someMethod', [], [callSomeMethod])])))
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.toEqual([
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'function SomeClass() {', '}', 'SomeClass.prototype.someMethod = function() {',
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' var self = this;', ' self.someMethod();', '};'
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].join('\n'));
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});
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});
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});
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}
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