151 lines
4.1 KiB
JavaScript
151 lines
4.1 KiB
JavaScript
import {ddescribe, describe, it, iit, expect, beforeEach} from 'test_lib/test_lib';
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import {Parser} from 'change_detection/parser/parser';
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import {Lexer} from 'change_detection/parser/lexer';
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import {ClosureMap} from 'change_detection/parser/closure_map';
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class TestData {
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constructor(a, b) {
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this.a = a;
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this.b = b;
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}
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}
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export function main() {
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function td(a = 0, b = 0) {
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return new TestData(a, b);
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}
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var context = td();
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var formatters;
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function createParser() {
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return new Parser(new Lexer(), new ClosureMap());
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}
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function _eval(text) {
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return new Parser(new Lexer(), new ClosureMap()).parse(text)
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.eval(context, formatters);
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}
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function expectEval(text) {
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return expect(_eval(text));
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}
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function expectEvalError(text) {
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return expect(() => _eval(text));
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}
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describe("parser", () => {
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describe("field access", () => {
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var parser;
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beforeEach(() => {
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parser = createParser();
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});
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it("should parse field access",() => {
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var exp = parser.parse("a");
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var context = td(999);
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expect(exp.eval(context, null)).toEqual(999);
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});
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it("should parse nested field access",() => {
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var exp = parser.parse("a.a");
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var context = td(td(999));
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expect(exp.eval(context, null)).toEqual(999);
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});
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});
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describe('expressions', () => {
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it('should parse numerical expressions', () => {
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expectEval("1").toEqual(1);
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});
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it('should parse unary - expressions', () => {
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expectEval("-1").toEqual(-1);
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expectEval("+1").toEqual(1);
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});
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it('should parse unary ! expressions', () => {
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expectEval("!true").toEqual(!true);
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});
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it('should parse multiplicative expressions', () => {
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expectEval("3*4/2%5").toEqual(3*4/2%5);
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// TODO(rado): This exists only in Dart, figure out whether to support it.
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// expectEval("3*4~/2%5")).toEqual(3*4~/2%5);
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});
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it('should parse additive expressions', () => {
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expectEval("3+6-2").toEqual(3+6-2);
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});
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it('should parse relational expressions', () => {
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expectEval("2<3").toEqual(2<3);
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expectEval("2>3").toEqual(2>3);
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expectEval("2<=2").toEqual(2<=2);
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expectEval("2>=2").toEqual(2>=2);
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});
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it('should parse equality expressions', () => {
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expectEval("2==3").toEqual(2==3);
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expectEval("2!=3").toEqual(2!=3);
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});
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it('should parse logicalAND expressions', () => {
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expectEval("true&&true").toEqual(true&&true);
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expectEval("true&&false").toEqual(true&&false);
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});
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it('should parse logicalOR expressions', () => {
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expectEval("false||true").toEqual(false||true);
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expectEval("false||false").toEqual(false||false);
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});
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it('should parse ternary/conditional expressions', () => {
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expectEval("7==3+4?10:20").toEqual(10);
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expectEval("false?10:20").toEqual(20);
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});
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it('should auto convert ints to strings', () => {
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expectEval("'str ' + 4").toEqual("str 4");
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expectEval("4 + ' str'").toEqual("4 str");
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expectEval("4 + 4").toEqual(8);
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expectEval("4 + 4 + ' str'").toEqual("8 str");
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expectEval("'str ' + 4 + 4").toEqual("str 44");
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});
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it('should behave gracefully with a null scope', () => {
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var exp = createParser().parse("null");
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expect(exp.eval(null, null)).toEqual(null);
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});
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it('should eval binary operators with null as null', () => {
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expectEval("null < 0").toBeNull();
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expectEval("null * 3").toBeNull();
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expectEval("null + 6").toBeNull();
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expectEval("5 + null").toBeNull();
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expectEval("null - 4").toBeNull();
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expectEval("3 - null").toBeNull();
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expectEval("null + null").toBeNull();
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expectEval("null - null").toBeNull();
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});
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});
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describe("error handling", () => {
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it('should throw on incorrect ternary operator syntax', () => {
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expectEvalError("true?1").toThrowError(new RegExp('Parser Error: Conditional expression true\\?1 requires all 3 expressions'));
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});
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});
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});
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}
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