372 lines
15 KiB
TypeScript
372 lines
15 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC 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 * as ts from 'typescript';
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import {Evaluator} from '../../src/metadata/evaluator';
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import {Symbols} from '../../src/metadata/symbols';
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import {Directory, expectNoDiagnostics, findVar, findVarInitializer, Host} from './typescript.mocks';
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describe('Evaluator', () => {
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const documentRegistry = ts.createDocumentRegistry();
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let host: ts.LanguageServiceHost;
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let service: ts.LanguageService;
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let program: ts.Program;
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let typeChecker: ts.TypeChecker;
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let symbols: Symbols;
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let evaluator: Evaluator;
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beforeEach(() => {
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host = new Host(FILES, [
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'expressions.ts', 'consts.ts', 'const_expr.ts', 'forwardRef.ts', 'classes.ts',
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'newExpression.ts', 'errors.ts', 'declared.ts'
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]);
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service = ts.createLanguageService(host, documentRegistry);
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program = service.getProgram()!;
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typeChecker = program.getTypeChecker();
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symbols = new Symbols(null as any as ts.SourceFile);
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evaluator = new Evaluator(symbols, new Map());
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});
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it('should not have typescript errors in test data', () => {
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expectNoDiagnostics(service.getCompilerOptionsDiagnostics());
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for (const sourceFile of program.getSourceFiles()) {
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expectNoDiagnostics(service.getSyntacticDiagnostics(sourceFile.fileName));
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if (sourceFile.fileName != 'errors.ts') {
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// Skip errors.ts because we it has intentional semantic errors that we are testing for.
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expectNoDiagnostics(service.getSemanticDiagnostics(sourceFile.fileName));
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}
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}
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});
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it('should be able to fold literal expressions', () => {
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const consts = program.getSourceFile('consts.ts')!;
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expect(evaluator.isFoldable(findVarInitializer(consts, 'someName'))).toBeTruthy();
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expect(evaluator.isFoldable(findVarInitializer(consts, 'someBool'))).toBeTruthy();
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expect(evaluator.isFoldable(findVarInitializer(consts, 'one'))).toBeTruthy();
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expect(evaluator.isFoldable(findVarInitializer(consts, 'two'))).toBeTruthy();
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});
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it('should be able to fold expressions with foldable references', () => {
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const expressions = program.getSourceFile('expressions.ts')!;
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symbols.define('someName', 'some-name');
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symbols.define('someBool', true);
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symbols.define('one', 1);
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symbols.define('two', 2);
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expect(evaluator.isFoldable(findVarInitializer(expressions, 'three'))).toBeTruthy();
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expect(evaluator.isFoldable(findVarInitializer(expressions, 'four'))).toBeTruthy();
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symbols.define('three', 3);
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symbols.define('four', 4);
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expect(evaluator.isFoldable(findVarInitializer(expressions, 'obj'))).toBeTruthy();
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expect(evaluator.isFoldable(findVarInitializer(expressions, 'arr'))).toBeTruthy();
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});
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it('should be able to evaluate literal expressions', () => {
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const consts = program.getSourceFile('consts.ts')!;
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expect(evaluator.evaluateNode(findVarInitializer(consts, 'someName'))).toBe('some-name');
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expect(evaluator.evaluateNode(findVarInitializer(consts, 'someBool'))).toBe(true);
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expect(evaluator.evaluateNode(findVarInitializer(consts, 'one'))).toBe(1);
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expect(evaluator.evaluateNode(findVarInitializer(consts, 'two'))).toBe(2);
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});
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it('should be able to evaluate expressions', () => {
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const expressions = program.getSourceFile('expressions.ts')!;
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symbols.define('someName', 'some-name');
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symbols.define('someBool', true);
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symbols.define('one', 1);
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symbols.define('two', 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'three'))).toBe(3);
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symbols.define('three', 3);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'four'))).toBe(4);
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symbols.define('four', 4);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'obj')))
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.toEqual({one: 1, two: 2, three: 3, four: 4});
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'arr'))).toEqual([1, 2, 3, 4]);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bTrue'))).toEqual(true);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bFalse'))).toEqual(false);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bAnd'))).toEqual(true);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bOr'))).toEqual(true);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'nDiv'))).toEqual(2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'nMod'))).toEqual(1);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bLOr'))).toEqual(false || true);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bLAnd'))).toEqual(true && true);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bBOr'))).toEqual(0x11 | 0x22);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bBAnd'))).toEqual(0x11 & 0x03);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bXor'))).toEqual(0x11 ^ 0x21);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bEqual')))
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.toEqual(1 == <any>'1');
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bNotEqual')))
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.toEqual(1 != <any>'1');
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bIdentical')))
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.toEqual(1 === <any>'1');
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bNotIdentical')))
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.toEqual(1 !== <any>'1');
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bLessThan'))).toEqual(1 < 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bGreaterThan'))).toEqual(1 > 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bLessThanEqual')))
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.toEqual(1 <= 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bGreaterThanEqual')))
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.toEqual(1 >= 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bShiftLeft'))).toEqual(1 << 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bShiftRight'))).toEqual(-1 >> 2);
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'bShiftRightU')))
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.toEqual(-1 >>> 2);
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});
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it('should report recursive references as symbolic', () => {
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const expressions = program.getSourceFile('expressions.ts')!;
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'recursiveA')))
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.toEqual({__symbolic: 'reference', name: 'recursiveB'});
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expect(evaluator.evaluateNode(findVarInitializer(expressions, 'recursiveB')))
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.toEqual({__symbolic: 'reference', name: 'recursiveA'});
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});
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it('should correctly handle special cases for CONST_EXPR', () => {
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const const_expr = program.getSourceFile('const_expr.ts')!;
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expect(evaluator.evaluateNode(findVarInitializer(const_expr, 'bTrue'))).toEqual(true);
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expect(evaluator.evaluateNode(findVarInitializer(const_expr, 'bFalse'))).toEqual(false);
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});
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it('should resolve a forwardRef', () => {
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const forwardRef = program.getSourceFile('forwardRef.ts')!;
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expect(evaluator.evaluateNode(findVarInitializer(forwardRef, 'bTrue'))).toEqual(true);
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expect(evaluator.evaluateNode(findVarInitializer(forwardRef, 'bFalse'))).toEqual(false);
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});
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it('should return new expressions', () => {
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symbols.define('Value', {__symbolic: 'reference', module: './classes', name: 'Value'});
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evaluator = new Evaluator(symbols, new Map());
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const newExpression = program.getSourceFile('newExpression.ts')!;
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expect(evaluator.evaluateNode(findVarInitializer(newExpression, 'someValue'))).toEqual({
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__symbolic: 'new',
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expression:
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{__symbolic: 'reference', name: 'Value', module: './classes', line: 4, character: 33},
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arguments: ['name', 12]
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});
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expect(evaluator.evaluateNode(findVarInitializer(newExpression, 'complex'))).toEqual({
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__symbolic: 'new',
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expression:
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{__symbolic: 'reference', name: 'Value', module: './classes', line: 5, character: 42},
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arguments: ['name', 12]
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});
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});
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it('should support reference to a declared module type', () => {
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const declared = program.getSourceFile('declared.ts')!;
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const aDecl = findVar(declared, 'a')!;
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expect(evaluator.evaluateNode(aDecl.type!)).toEqual({
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__symbolic: 'select',
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expression: {__symbolic: 'reference', name: 'Foo'},
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member: 'A'
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});
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});
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it('should return errors for unsupported expressions', () => {
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const errors = program.getSourceFile('errors.ts')!;
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const fDecl = findVar(errors, 'f')!;
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expect(evaluator.evaluateNode(fDecl.initializer!))
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.toEqual({__symbolic: 'error', message: 'Lambda not supported', line: 1, character: 12});
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const eDecl = findVar(errors, 'e')!;
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expect(evaluator.evaluateNode(eDecl.type!)).toEqual({
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__symbolic: 'error',
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message: 'Could not resolve type',
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line: 2,
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character: 11,
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context: {typeName: 'NotFound'}
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});
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const sDecl = findVar(errors, 's')!;
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expect(evaluator.evaluateNode(sDecl.initializer!)).toEqual({
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__symbolic: 'error',
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message: 'Name expected',
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line: 3,
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character: 14,
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context: {received: '1'}
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});
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const tDecl = findVar(errors, 't')!;
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expect(evaluator.evaluateNode(tDecl.initializer!)).toEqual({
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__symbolic: 'error',
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message: 'Expression form not supported',
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line: 4,
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character: 12
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});
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});
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it('should be able to fold an array spread', () => {
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const expressions = program.getSourceFile('expressions.ts')!;
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symbols.define('arr', [1, 2, 3, 4]);
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const arrSpread = findVar(expressions, 'arrSpread')!;
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expect(evaluator.evaluateNode(arrSpread.initializer!)).toEqual([0, 1, 2, 3, 4, 5]);
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});
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it('should be able to produce a spread expression', () => {
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const expressions = program.getSourceFile('expressions.ts')!;
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const arrSpreadRef = findVar(expressions, 'arrSpreadRef')!;
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expect(evaluator.evaluateNode(arrSpreadRef.initializer!)).toEqual([
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0, {__symbolic: 'spread', expression: {__symbolic: 'reference', name: 'arrImport'}}, 5
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]);
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});
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it('should be able to handle a new expression with no arguments', () => {
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const source = sourceFileOf(`
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export var a = new f;
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`);
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const expr = findVar(source, 'a')!;
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expect(evaluator.evaluateNode(expr.initializer!))
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.toEqual({__symbolic: 'new', expression: {__symbolic: 'reference', name: 'f'}});
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});
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describe('with substitution', () => {
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let evaluator: Evaluator;
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const lambdaTemp = 'lambdaTemp';
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beforeEach(() => {
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evaluator = new Evaluator(symbols, new Map(), {
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substituteExpression: (value, node) => {
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if (node.kind == ts.SyntaxKind.ArrowFunction) {
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return {__symbolic: 'reference', name: lambdaTemp};
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}
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return value;
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}
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});
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});
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it('should be able to substitute a lambda with a reference', () => {
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const source = sourceFileOf(`
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var b = 1;
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export var a = () => b;
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`);
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const expr = findVar(source, 'a');
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expect(evaluator.evaluateNode(expr!.initializer!))
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.toEqual({__symbolic: 'reference', name: lambdaTemp});
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});
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it('should be able to substitute a lambda in an expression', () => {
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const source = sourceFileOf(`
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var b = 1;
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export var a = [
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{ provide: 'someValue': useFactory: () => b }
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];
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`);
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const expr = findVar(source, 'a');
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expect(evaluator.evaluateNode(expr!.initializer!)).toEqual([
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{provide: 'someValue', useFactory: {__symbolic: 'reference', name: lambdaTemp}}
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]);
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});
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});
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});
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function sourceFileOf(text: string): ts.SourceFile {
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return ts.createSourceFile('test.ts', text, ts.ScriptTarget.Latest, true);
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}
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const FILES: Directory = {
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'directives.ts': `
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export function Pipe(options: { name?: string, pure?: boolean}) {
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return function(fn: Function) { }
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}
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`,
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'classes.ts': `
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export class Value {
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constructor(public name: string, public value: any) {}
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}
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`,
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'consts.ts': `
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export var someName = 'some-name';
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export var someBool = true;
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export var one = 1;
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export var two = 2;
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export var arrImport = [1, 2, 3, 4];
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`,
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'expressions.ts': `
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import {arrImport} from './consts';
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export var someName = 'some-name';
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export var someBool = true;
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export var one = 1;
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export var two = 2;
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export var three = one + two;
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export var four = two * two;
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export var obj = { one: one, two: two, three: three, four: four };
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export var arr = [one, two, three, four];
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export var bTrue = someBool;
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export var bFalse = !someBool;
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export var bAnd = someBool && someBool;
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export var bOr = someBool || someBool;
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export var nDiv = four / two;
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export var nMod = (four + one) % two;
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export var bLOr = false || true; // true
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export var bLAnd = true && true; // true
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export var bBOr = 0x11 | 0x22; // 0x33
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export var bBAnd = 0x11 & 0x03; // 0x01
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export var bXor = 0x11 ^ 0x21; // 0x20
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export var bEqual = 1 == <any>"1"; // true
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export var bNotEqual = 1 != <any>"1"; // false
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export var bIdentical = 1 === <any>"1"; // false
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export var bNotIdentical = 1 !== <any>"1"; // true
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export var bLessThan = 1 < 2; // true
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export var bGreaterThan = 1 > 2; // false
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export var bLessThanEqual = 1 <= 2; // true
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export var bGreaterThanEqual = 1 >= 2; // false
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export var bShiftLeft = 1 << 2; // 0x04
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export var bShiftRight = -1 >> 2; // -1
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export var bShiftRightU = -1 >>> 2; // 0x3fffffff
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export var arrSpread = [0, ...arr, 5];
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export var arrSpreadRef = [0, ...arrImport, 5];
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export var recursiveA = recursiveB;
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export var recursiveB = recursiveA;
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`,
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'A.ts': `
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import {Pipe} from './directives';
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@Pipe({name: 'A', pure: false})
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export class A {}`,
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'B.ts': `
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import {Pipe} from './directives';
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import {someName, someBool} from './consts';
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@Pipe({name: someName, pure: someBool})
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export class B {}`,
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'const_expr.ts': `
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function CONST_EXPR(value: any) { return value; }
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export var bTrue = CONST_EXPR(true);
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export var bFalse = CONST_EXPR(false);
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`,
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'forwardRef.ts': `
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function forwardRef(value: any) { return value; }
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export var bTrue = forwardRef(() => true);
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export var bFalse = forwardRef(() => false);
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`,
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'newExpression.ts': `
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import {Value} from './classes';
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function CONST_EXPR(value: any) { return value; }
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function forwardRef(value: any) { return value; }
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export const someValue = new Value("name", 12);
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export const complex = CONST_EXPR(new Value("name", forwardRef(() => 12)));
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`,
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'errors.ts': `
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let f = () => 1;
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let e: NotFound;
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let s = { 1: 1, 2: 2 };
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let t = typeof 12;
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`,
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'declared.ts': `
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declare namespace Foo {
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type A = string;
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}
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let a: Foo.A = 'some value';
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`
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};
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