angular-docs-cn/tools/metadata/test/evaluator.spec.ts

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import * as ts from 'typescript';
import * as fs from 'fs';
import {Directory, Host, expectNoDiagnostics, findVar} from './typescript.mocks';
import {Evaluator} from '../src/evaluator';
import {Symbols} from '../src/symbols';
describe('Evaluator', () => {
let host: ts.LanguageServiceHost;
let service: ts.LanguageService;
let program: ts.Program;
let typeChecker: ts.TypeChecker;
let symbols: Symbols;
let evaluator: Evaluator;
beforeEach(() => {
host = new Host(FILES, ['expressions.ts']);
service = ts.createLanguageService(host);
program = service.getProgram();
typeChecker = program.getTypeChecker();
symbols = new Symbols();
evaluator = new Evaluator(service, typeChecker, symbols, f => f);
});
it('should not have typescript errors in test data', () => {
expectNoDiagnostics(service.getCompilerOptionsDiagnostics());
for (const sourceFile of program.getSourceFiles()) {
expectNoDiagnostics(service.getSyntacticDiagnostics(sourceFile.fileName));
}
});
it('should be able to fold literal expressions', () => {
var consts = program.getSourceFile('consts.ts');
expect(evaluator.isFoldable(findVar(consts, 'someName').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(consts, 'someBool').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(consts, 'one').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(consts, 'two').initializer)).toBeTruthy();
});
it('should be able to fold expressions with foldable references', () => {
var expressions = program.getSourceFile('expressions.ts');
expect(evaluator.isFoldable(findVar(expressions, 'three').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(expressions, 'four').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(expressions, 'obj').initializer)).toBeTruthy();
expect(evaluator.isFoldable(findVar(expressions, 'arr').initializer)).toBeTruthy();
});
it('should be able to evaluate literal expressions', () => {
var consts = program.getSourceFile('consts.ts');
expect(evaluator.evaluateNode(findVar(consts, 'someName').initializer)).toBe('some-name');
expect(evaluator.evaluateNode(findVar(consts, 'someBool').initializer)).toBe(true);
expect(evaluator.evaluateNode(findVar(consts, 'one').initializer)).toBe(1);
expect(evaluator.evaluateNode(findVar(consts, 'two').initializer)).toBe(2);
});
it('should be able to evaluate expressions', () => {
var expressions = program.getSourceFile('expressions.ts');
expect(evaluator.evaluateNode(findVar(expressions, 'three').initializer)).toBe(3);
expect(evaluator.evaluateNode(findVar(expressions, 'four').initializer)).toBe(4);
expect(evaluator.evaluateNode(findVar(expressions, 'obj').initializer))
.toEqual({one: 1, two: 2, three: 3, four: 4});
expect(evaluator.evaluateNode(findVar(expressions, 'arr').initializer)).toEqual([1, 2, 3, 4]);
expect(evaluator.evaluateNode(findVar(expressions, 'bTrue').initializer)).toEqual(true);
expect(evaluator.evaluateNode(findVar(expressions, 'bFalse').initializer)).toEqual(false);
expect(evaluator.evaluateNode(findVar(expressions, 'bAnd').initializer)).toEqual(true);
expect(evaluator.evaluateNode(findVar(expressions, 'bOr').initializer)).toEqual(true);
expect(evaluator.evaluateNode(findVar(expressions, 'nDiv').initializer)).toEqual(2);
expect(evaluator.evaluateNode(findVar(expressions, 'nMod').initializer)).toEqual(1);
expect(evaluator.evaluateNode(findVar(expressions, 'bLOr').initializer)).toEqual(false || true);
expect(evaluator.evaluateNode(findVar(expressions, 'bLAnd').initializer)).toEqual(true && true);
expect(evaluator.evaluateNode(findVar(expressions, 'bBOr').initializer)).toEqual(0x11 | 0x22);
expect(evaluator.evaluateNode(findVar(expressions, 'bBAnd').initializer)).toEqual(0x11 & 0x03);
expect(evaluator.evaluateNode(findVar(expressions, 'bXor').initializer)).toEqual(0x11 ^ 0x21);
expect(evaluator.evaluateNode(findVar(expressions, 'bEqual').initializer))
.toEqual(1 == <any>"1");
expect(evaluator.evaluateNode(findVar(expressions, 'bNotEqual').initializer))
.toEqual(1 != <any>"1");
expect(evaluator.evaluateNode(findVar(expressions, 'bIdentical').initializer))
.toEqual(1 === <any>"1");
expect(evaluator.evaluateNode(findVar(expressions, 'bNotIdentical').initializer))
.toEqual(1 !== <any>"1");
expect(evaluator.evaluateNode(findVar(expressions, 'bLessThan').initializer)).toEqual(1 < 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bGreaterThan').initializer)).toEqual(1 > 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bLessThanEqual').initializer))
.toEqual(1 <= 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bGreaterThanEqual').initializer))
.toEqual(1 >= 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bShiftLeft').initializer)).toEqual(1 << 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bShiftRight').initializer))
.toEqual(-1 >> 2);
expect(evaluator.evaluateNode(findVar(expressions, 'bShiftRightU').initializer))
.toEqual(-1 >>> 2);
});
it('should report recursive references as symbolic', () => {
var expressions = program.getSourceFile('expressions.ts');
expect(evaluator.evaluateNode(findVar(expressions, 'recursiveA').initializer))
.toEqual({__symbolic: "reference", name: "recursiveB", module: "expressions.ts"});
expect(evaluator.evaluateNode(findVar(expressions, 'recursiveB').initializer))
.toEqual({__symbolic: "reference", name: "recursiveA", module: "expressions.ts"});
});
});
const FILES: Directory = {
'directives.ts': `
export function Pipe(options: { name?: string, pure?: boolean}) {
return function(fn: Function) { }
}
`,
'consts.ts': `
export var someName = 'some-name';
export var someBool = true;
export var one = 1;
export var two = 2;
`,
'expressions.ts': `
import {someName, someBool, one, two} from './consts';
export var three = one + two;
export var four = two * two;
export var obj = { one: one, two: two, three: three, four: four };
export var arr = [one, two, three, four];
export var bTrue = someBool;
export var bFalse = !someBool;
export var bAnd = someBool && someBool;
export var bOr = someBool || someBool;
export var nDiv = four / two;
export var nMod = (four + one) % two;
export var bLOr = false || true; // true
export var bLAnd = true && true; // true
export var bBOr = 0x11 | 0x22; // 0x33
export var bBAnd = 0x11 & 0x03; // 0x01
export var bXor = 0x11 ^ 0x21; // 0x20
export var bEqual = 1 == <any>"1"; // true
export var bNotEqual = 1 != <any>"1"; // false
export var bIdentical = 1 === <any>"1"; // false
export var bNotIdentical = 1 !== <any>"1"; // true
export var bLessThan = 1 < 2; // true
export var bGreaterThan = 1 > 2; // false
export var bLessThanEqual = 1 <= 2; // true
export var bGreaterThanEqual = 1 >= 2; // false
export var bShiftLeft = 1 << 2; // 0x04
export var bShiftRight = -1 >> 2; // -1
export var bShiftRightU = -1 >>> 2; // 0x3fffffff
export var recursiveA = recursiveB;
export var recursiveB = recursiveA;
`,
'A.ts': `
import {Pipe} from './directives';
@Pipe({name: 'A', pure: false})
export class A {}`,
'B.ts': `
import {Pipe} from './directives';
import {someName, someBool} from './consts';
@Pipe({name: someName, pure: someBool})
export class B {}`
}