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feat(parser): add support for ternary operator

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vsavkin
2014-11-03 17:25:16 -08:00
parent 965fa1a985
commit a7fe25d93f
3 changed files with 135 additions and 63 deletions
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65
modules/change_detection/test/parser/parser_spec.js
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@ -20,7 +20,15 @@ export function main() {
function _eval(text) {
return new Parser(new Lexer(), new ClosureMap()).parse(text)
.eval(context, formatters);
.eval(context, formatters);
}
function expectEval(text) {
return expect(_eval(text));
}
function expectEvalError(text) {
return expect(() => _eval(text));
}
describe("parser", () => {
@ -47,64 +55,75 @@ export function main() {
describe('expressions', () => {
it('should parse numerical expressions', () => {
expect(_eval("1")).toEqual(1);
expectEval("1").toEqual(1);
});
it('should parse unary - expressions', () => {
expect(_eval("-1")).toEqual(-1);
expect(_eval("+1")).toEqual(1);
expectEval("-1").toEqual(-1);
expectEval("+1").toEqual(1);
});
it('should parse unary ! expressions', () => {
expect(_eval("!true")).toEqual(!true);
expectEval("!true").toEqual(!true);
});
it('should parse multiplicative expressions', () => {
expect(_eval("3*4/2%5")).toEqual(3*4/2%5);
expectEval("3*4/2%5").toEqual(3*4/2%5);
// TODO(rado): This exists only in Dart, figure out whether to support it.
// expect(_eval("3*4~/2%5")).toEqual(3*4~/2%5);
// expectEval("3*4~/2%5")).toEqual(3*4~/2%5);
});
it('should parse additive expressions', () => {
expect(_eval("3+6-2")).toEqual(3+6-2);
expectEval("3+6-2").toEqual(3+6-2);
});
it('should parse relational expressions', () => {
expect(_eval("2<3")).toEqual(2<3);
expect(_eval("2>3")).toEqual(2>3);
expect(_eval("2<=2")).toEqual(2<=2);
expect(_eval("2>=2")).toEqual(2>=2);
expectEval("2<3").toEqual(2<3);
expectEval("2>3").toEqual(2>3);
expectEval("2<=2").toEqual(2<=2);
expectEval("2>=2").toEqual(2>=2);
});
it('should parse equality expressions', () => {
expect(_eval("2==3")).toEqual(2==3);
expect(_eval("2!=3")).toEqual(2!=3);
expectEval("2==3").toEqual(2==3);
expectEval("2!=3").toEqual(2!=3);
});
it('should parse logicalAND expressions', () => {
expect(_eval("true&&true")).toEqual(true&&true);
expect(_eval("true&&false")).toEqual(true&&false);
expectEval("true&&true").toEqual(true&&true);
expectEval("true&&false").toEqual(true&&false);
});
it('should parse logicalOR expressions', () => {
expect(_eval("false||true")).toEqual(false||true);
expect(_eval("false||false")).toEqual(false||false);
expectEval("false||true").toEqual(false||true);
expectEval("false||false").toEqual(false||false);
});
it('should parse ternary/conditional expressions', () => {
expectEval("7==3+4?10:20").toEqual(10);
expectEval("false?10:20").toEqual(20);
});
it('should auto convert ints to strings', () => {
expect(_eval("'str ' + 4")).toEqual("str 4");
expect(_eval("4 + ' str'")).toEqual("4 str");
expect(_eval("4 + 4")).toEqual(8);
expect(_eval("4 + 4 + ' str'")).toEqual("8 str");
expect(_eval("'str ' + 4 + 4")).toEqual("str 44");
expectEval("'str ' + 4").toEqual("str 4");
expectEval("4 + ' str'").toEqual("4 str");
expectEval("4 + 4").toEqual(8);
expectEval("4 + 4 + ' str'").toEqual("8 str");
expectEval("'str ' + 4 + 4").toEqual("str 44");
});
});
describe("error handling", () => {
it('should throw on incorrect ternary operator syntax', () => {
expectEvalError("true?1").toThrowError(new RegExp('Parser Error: Conditional expression true\\?1 requires all 3 expressions'));
});
});
});