01f711281c
This is important to not confuse users nor downstream tools that consume our source maps. For generated content for which we don’t have an original source file, we use the generated file now. Fixes #19538
464 lines
22 KiB
TypeScript
464 lines
22 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 {StaticSymbol} from '@angular/compiler/src/aot/static_symbol';
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import * as o from '@angular/compiler/src/output/output_ast';
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import {TypeScriptEmitter} from '@angular/compiler/src/output/ts_emitter';
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import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '@angular/compiler/src/parse_util';
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import {stripSourceMapAndNewLine} from './abstract_emitter_spec';
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const someGenFilePath = 'somePackage/someGenFile';
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const anotherModuleUrl = 'somePackage/someOtherPath';
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const sameModuleIdentifier = new o.ExternalReference(null, 'someLocalId', null);
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const externalModuleIdentifier = new o.ExternalReference(anotherModuleUrl, 'someExternalId', null);
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export function main() {
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// Not supported features of our OutputAst in TS:
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// - real `const` like in Dart
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// - final fields
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describe('TypeScriptEmitter', () => {
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let emitter: TypeScriptEmitter;
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let someVar: o.ReadVarExpr;
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beforeEach(() => {
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emitter = new TypeScriptEmitter();
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someVar = o.variable('someVar', null, null);
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});
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function emitStmt(stmt: o.Statement | o.Statement[], preamble?: string): string {
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const stmts = Array.isArray(stmt) ? stmt : [stmt];
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const source = emitter.emitStatements(someGenFilePath, stmts, preamble);
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return stripSourceMapAndNewLine(source);
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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:any = 1;`);
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(null, [o.StmtModifier.Final])))
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.toEqual(`const someVar:any = 1;`);
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(null, [o.StmtModifier.Exported])))
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.toEqual(`export var someVar:any = 1;`);
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(o.INT_TYPE)))
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.toEqual(`var someVar:number = 1;`);
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expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(o.INFERRED_TYPE)))
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.toEqual(`var someVar = 1;`);
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});
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describe('declare variables with ExternExpressions as values', () => {
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it('should create no reexport if the identifier is in the same module', () => {
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// identifier is in the same module -> no reexport
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expect(emitStmt(someVar.set(o.importExpr(sameModuleIdentifier)).toDeclStmt(null, [
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o.StmtModifier.Exported
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]))).toEqual('export var someVar:any = someLocalId;');
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});
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it('should create no reexport if the variable is not exported', () => {
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expect(emitStmt(someVar.set(o.importExpr(externalModuleIdentifier)).toDeclStmt())).toEqual([
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`import * as i0 from 'somePackage/someOtherPath';`, `var someVar:any = i0.someExternalId;`
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].join('\n'));
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});
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it('should create no reexport if the variable is typed', () => {
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expect(emitStmt(someVar.set(o.importExpr(externalModuleIdentifier))
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.toDeclStmt(o.DYNAMIC_TYPE, [o.StmtModifier.Exported])))
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.toEqual([
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`import * as i0 from 'somePackage/someOtherPath';`,
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`export var someVar:any = i0.someExternalId;`
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].join('\n'));
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});
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it('should create a reexport', () => {
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expect(emitStmt(someVar.set(o.importExpr(externalModuleIdentifier))
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.toDeclStmt(null, [o.StmtModifier.Exported])))
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.toEqual([
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`export {someExternalId as someVar} from 'somePackage/someOtherPath';`, ``
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].join('\n'));
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});
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it('should create multiple reexports from the same file', () => {
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const someVar2 = o.variable('someVar2');
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const externalModuleIdentifier2 =
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new o.ExternalReference(anotherModuleUrl, 'someExternalId2', null);
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expect(emitStmt([
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someVar.set(o.importExpr(externalModuleIdentifier))
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.toDeclStmt(null, [o.StmtModifier.Exported]),
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someVar2.set(o.importExpr(externalModuleIdentifier2))
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.toDeclStmt(null, [o.StmtModifier.Exported])
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]))
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.toEqual([
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`export {someExternalId as someVar,someExternalId2 as someVar2} from 'somePackage/someOtherPath';`,
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``
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].join('\n'));
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});
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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([
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{key: 'someKey', value: o.literal(1), quoted: false},
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{key: 'a', value: o.literal('a'), quoted: false},
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{key: '*', value: o.literal('star'), quoted: true},
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]).toStmt())
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.replace(/\s+/gm, ''))
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.toEqual(`{someKey:1,a:'a','*':'star'};`);
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});
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it('should break expressions into multiple lines if they are too long', () => {
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const values: o.Expression[] = new Array(100);
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values.fill(o.literal(1));
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values.splice(50, 0, o.fn([], [new o.ReturnStatement(o.literal(1))]));
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expect(emitStmt(o.variable('fn').callFn(values).toStmt())).toEqual([
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'fn(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,',
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' 1,1,1,1,1,1,1,1,1,1,():void => {', ' return 1;',
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' },1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,',
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' 1,1,1,1,1,1,1,1,1,1,1,1);'
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].join('\n'));
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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 as any);');
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expect(emitStmt(o.literal(undefined).toStmt())).toEqual('(undefined as any);');
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expect(emitStmt(o.variable('a', null).isBlank().toStmt())).toEqual('(a == null);');
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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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`import * as i0 from 'somePackage/someOtherPath';`, `i0.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(someVar.cast(o.INT_TYPE).toStmt())).toEqual('(<number>someVar);');
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expect(emitStmt(o.not(someVar).toStmt())).toEqual('!someVar;');
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expect(emitStmt(o.assertNotNull(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(['():void => {', '};'].join('\n'));
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expect(emitStmt(o.fn([], [new o.ReturnStatement(o.literal(1))], o.INT_TYPE).toStmt()))
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.toEqual(['():number => {', ' return 1;\n};'].join('\n'));
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expect(emitStmt(o.fn([new o.FnParam('param1', o.INT_TYPE)], []).toStmt())).toEqual([
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'(param1:number):void => {', '};'
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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():void {', '}'].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [], [], null, [o.StmtModifier.Exported])))
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.toEqual(['export function someFn():void {', '}'].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt(
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'someFn', [], [new o.ReturnStatement(o.literal(1))], o.INT_TYPE)))
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.toEqual(['function someFn():number {', ' return 1;', '}'].join('\n'));
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expect(emitStmt(new o.DeclareFunctionStmt('someFn', [new o.FnParam('param1', o.INT_TYPE)], [
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]))).toEqual(['function someFn(param1:number):void {', '}'].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) {', ' const stack:any = 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(['class SomeClass {', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt('SomeClass', null !, [], [], null !, [], [
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o.StmtModifier.Exported
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]))).toEqual(['export class SomeClass {', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt('SomeClass', o.variable('SomeSuperClass'), [], [], null !, [
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]))).toEqual(['class SomeClass extends SomeSuperClass {', '}'].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(new o.ClassStmt(
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'SomeClass', null !, [], [], new o.ClassMethod(null !, [], []), [])))
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.toEqual(['class SomeClass {', ' constructor() {', ' }', '}'].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', o.INT_TYPE)], []), [])))
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.toEqual(
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['class SomeClass {', ' constructor(someParam:number) {', ' }', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !, [], [], new o.ClassMethod(null !, [], [superCall]), [])))
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.toEqual([
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'class SomeClass {', ' constructor() {', ' super(someParam);', ' }', '}'
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].join('\n'));
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expect(
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emitStmt(new o.ClassStmt(
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'SomeClass', null !, [], [], new o.ClassMethod(null !, [], [callSomeMethod]), [])))
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.toEqual([
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'class SomeClass {', ' constructor() {', ' this.someMethod();', ' }', '}'
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].join('\n'));
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});
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it('should support declaring fields', () => {
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !, [new o.ClassField('someField')], [], null !, [])))
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.toEqual(['class SomeClass {', ' someField:any;', '}'].join('\n'));
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expect(
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emitStmt(new o.ClassStmt(
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'SomeClass', null !, [new o.ClassField('someField', o.INT_TYPE)], [], null !, [])))
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.toEqual(['class SomeClass {', ' someField:number;', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !,
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[new o.ClassField('someField', o.INT_TYPE, [o.StmtModifier.Private])], [],
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null !, [])))
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.toEqual(['class SomeClass {', ' /*private*/ someField:number;', '}'].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(['class SomeClass {', ' get someGetter():any {', ' }', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !, [], [new o.ClassGetter('someGetter', [], o.INT_TYPE)],
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null !, [])))
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.toEqual(['class SomeClass {', ' get someGetter():number {', ' }', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !, [], [new o.ClassGetter('someGetter', [callSomeMethod])],
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null !, [])))
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.toEqual([
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'class SomeClass {', ' get someGetter():any {', ' this.someMethod();', ' }', '}'
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].join('\n'));
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expect(emitStmt(new o.ClassStmt(
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'SomeClass', null !, [],
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[new o.ClassGetter('someGetter', [], null !, [o.StmtModifier.Private])], null !,
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[])))
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.toEqual(
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['class SomeClass {', ' private get someGetter():any {', ' }', '}'].join('\n'));
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});
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it('should support methods', () => {
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expect(emitStmt(new o.ClassStmt('SomeClass', null !, [], [], null !, [
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new o.ClassMethod('someMethod', [], [])
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]))).toEqual(['class SomeClass {', ' someMethod():void {', ' }', '}'].join('\n'));
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expect(emitStmt(new o.ClassStmt('SomeClass', null !, [], [], null !, [
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new o.ClassMethod('someMethod', [], [], o.INT_TYPE)
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]))).toEqual(['class SomeClass {', ' someMethod():number {', ' }', '}'].join('\n'));
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expect(
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emitStmt(new o.ClassStmt(
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'SomeClass', null !, [], [], null !,
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[new o.ClassMethod('someMethod', [new o.FnParam('someParam', o.INT_TYPE)], [])])))
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.toEqual([
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'class SomeClass {', ' someMethod(someParam:number):void {', ' }', '}'
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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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'class SomeClass {', ' someMethod():void {', ' this.someMethod();', ' }', '}'
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].join('\n'));
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});
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});
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it('should support builtin types', () => {
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const writeVarExpr = o.variable('a').set(o.NULL_EXPR);
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expect(emitStmt(writeVarExpr.toDeclStmt(o.DYNAMIC_TYPE)))
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|
.toEqual('var a:any = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.BOOL_TYPE)))
|
|
.toEqual('var a:boolean = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.INT_TYPE)))
|
|
.toEqual('var a:number = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.NUMBER_TYPE)))
|
|
.toEqual('var a:number = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.STRING_TYPE)))
|
|
.toEqual('var a:string = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.FUNCTION_TYPE)))
|
|
.toEqual('var a:Function = (null as any);');
|
|
});
|
|
|
|
it('should support external types', () => {
|
|
const writeVarExpr = o.variable('a').set(o.NULL_EXPR);
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.importType(sameModuleIdentifier))))
|
|
.toEqual('var a:someLocalId = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(o.importType(externalModuleIdentifier)))).toEqual([
|
|
`import * as i0 from 'somePackage/someOtherPath';`,
|
|
`var a:i0.someExternalId = (null as any);`
|
|
].join('\n'));
|
|
});
|
|
|
|
it('should support expression types', () => {
|
|
expect(
|
|
emitStmt(o.variable('a').set(o.NULL_EXPR).toDeclStmt(o.expressionType(o.variable('b')))))
|
|
.toEqual('var a:b = (null as any);');
|
|
});
|
|
|
|
it('should support expressions with type parameters', () => {
|
|
expect(emitStmt(o.variable('a')
|
|
.set(o.NULL_EXPR)
|
|
.toDeclStmt(o.importType(externalModuleIdentifier, [o.STRING_TYPE]))))
|
|
.toEqual([
|
|
`import * as i0 from 'somePackage/someOtherPath';`,
|
|
`var a:i0.someExternalId<string> = (null as any);`
|
|
].join('\n'));
|
|
});
|
|
|
|
it('should support combined types', () => {
|
|
const writeVarExpr = o.variable('a').set(o.NULL_EXPR);
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(new o.ArrayType(null !))))
|
|
.toEqual('var a:any[] = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(new o.ArrayType(o.INT_TYPE))))
|
|
.toEqual('var a:number[] = (null as any);');
|
|
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(new o.MapType(null))))
|
|
.toEqual('var a:{[key: string]:any} = (null as any);');
|
|
expect(emitStmt(writeVarExpr.toDeclStmt(new o.MapType(o.INT_TYPE))))
|
|
.toEqual('var a:{[key: string]:number} = (null as any);');
|
|
});
|
|
|
|
it('should support a preamble', () => {
|
|
expect(emitStmt(o.variable('a').toStmt(), '/* SomePreamble */')).toBe([
|
|
'/* SomePreamble */', 'a;'
|
|
].join('\n'));
|
|
});
|
|
|
|
describe('emitter context', () => {
|
|
it('should be able to back to the generating span', () => {
|
|
const file = new ParseSourceFile('some content', 'a.ts');
|
|
const returnSpan = new ParseSourceSpan(
|
|
new ParseLocation(file, 100, 10, 10), new ParseLocation(file, 200, 20, 10));
|
|
const referenceSpan = new ParseSourceSpan(
|
|
new ParseLocation(file, 150, 15, 10), new ParseLocation(file, 175, 17, 10));
|
|
const statements = [new o.ClassStmt(
|
|
'SomeClass', null, [], [], new o.ClassMethod(null, [], []),
|
|
[new o.ClassMethod('someMethod', [new o.FnParam('a', o.INT_TYPE)], [
|
|
o.variable('someVar', o.INT_TYPE).set(o.literal(0)).toDeclStmt(),
|
|
new o.ReturnStatement(o.variable('someVar', null, referenceSpan), returnSpan)
|
|
])])];
|
|
const {sourceText, context} =
|
|
emitter.emitStatementsAndContext('a.ts', statements, '/* some preamble /*\n\n');
|
|
const spanOf = (text: string, after: number = 0) => {
|
|
const location = sourceText.indexOf(text, after);
|
|
const {line, col} = calculateLineCol(sourceText, location);
|
|
return context.spanOf(line, col);
|
|
};
|
|
const returnLoc = sourceText.indexOf('return');
|
|
expect(spanOf('return someVar')).toEqual(returnSpan, 'return span calculated incorrectly');
|
|
expect(spanOf(';', returnLoc)).toEqual(returnSpan, 'reference span calculated incorrectly');
|
|
expect(spanOf('someVar', returnLoc))
|
|
.toEqual(referenceSpan, 'return span calculated incorrectly');
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
function calculateLineCol(text: string, offset: number): {line: number, col: number} {
|
|
const lines = text.split('\n');
|
|
let line = 0;
|
|
for (let cur = 0; cur < text.length; line++) {
|
|
const next = cur + lines[line].length + 1;
|
|
if (next > offset) {
|
|
return {line, col: offset - cur};
|
|
}
|
|
cur = next;
|
|
}
|
|
return {line, col: 0};
|
|
} |