angular-cn/modules/angular2/test/change_detection/parser/parser_spec.js

611 lines
22 KiB
JavaScript

import {ddescribe, describe, it, xit, iit, expect, beforeEach} from 'angular2/test_lib';
import {BaseException, isBlank, isPresent} from 'angular2/src/facade/lang';
import {reflector} from 'angular2/src/reflection/reflection';
import {MapWrapper, ListWrapper} from 'angular2/src/facade/collection';
import {Parser} from 'angular2/src/change_detection/parser/parser';
import {Lexer} from 'angular2/src/change_detection/parser/lexer';
import {Locals} from 'angular2/src/change_detection/parser/locals';
import {Pipe, LiteralPrimitive} from 'angular2/src/change_detection/parser/ast';
class TestData {
a;
b;
fnReturnValue;
constructor(a, b, fnReturnValue) {
this.a = a;
this.b = b;
this.fnReturnValue = fnReturnValue;
}
fn() {
return this.fnReturnValue;
}
add(a, b) {
return a + b;
}
}
export function main() {
function td(a = 0, b = 0, fnReturnValue = "constant") {
return new TestData(a, b, fnReturnValue);
}
function createParser() {
return new Parser(new Lexer(), reflector);
}
function parseAction(text, location = null) {
return createParser().parseAction(text, location);
}
function parseBinding(text, location = null) {
return createParser().parseBinding(text, location);
}
function parseTemplateBindings(text, location = null) {
return createParser().parseTemplateBindings(text, location);
}
function parseInterpolation(text, location = null) {
return createParser().parseInterpolation(text, location);
}
function addPipes(ast, pipes) {
return createParser().addPipes(ast, pipes);
}
function emptyLocals() {
return new Locals(null, MapWrapper.create());
}
function expectEval(text, passedInContext = null, passedInLocals = null) {
var c = isBlank(passedInContext) ? td() : passedInContext;
var l = isBlank(passedInLocals) ? emptyLocals() : passedInLocals;
return expect(parseAction(text).eval(c, l));
}
function expectEvalError(text, passedInContext = null, passedInLocals = null) {
var c = isBlank(passedInContext) ? td() : passedInContext;
var l = isBlank(passedInLocals) ? emptyLocals() : passedInLocals;
return expect(() => parseAction(text).eval(c, l));
}
function evalAsts(asts, passedInContext = null) {
var c = isBlank(passedInContext) ? td() : passedInContext;
var res = [];
for (var i=0; i<asts.length; i++) {
ListWrapper.push(res, asts[i].eval(c, emptyLocals()));
}
return res;
}
describe("parser", () => {
describe("parseAction", () => {
describe("basic expressions", () => {
it('should parse numerical expressions', () => {
expectEval("1").toEqual(1);
});
it('should parse strings', () => {
expectEval("'1'").toEqual('1');
expectEval('"1"').toEqual('1');
});
it('should parse null', () => {
expectEval("null").toBe(null);
});
it('should parse unary - expressions', () => {
expectEval("-1").toEqual(-1);
expectEval("+1").toEqual(1);
});
it('should parse unary ! expressions', () => {
expectEval("!true").toEqual(!true);
expectEval("!!true").toEqual(!!true);
});
it('should parse multiplicative expressions', () => {
expectEval("3*4/2%5").toEqual(3 * 4 / 2 % 5);
});
it('should parse additive expressions', () => {
expectEval("3+6-2").toEqual(3 + 6 - 2);
});
it('should parse relational expressions', () => {
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', () => {
expectEval("2==3").toEqual(2 == 3);
expectEval("2!=3").toEqual(2 != 3);
});
it('should parse logicalAND expressions', () => {
expectEval("true&&true").toEqual(true && true);
expectEval("true&&false").toEqual(true && false);
});
it('should parse logicalOR expressions', () => {
expectEval("false||true").toEqual(false || true);
expectEval("false||false").toEqual(false || false);
});
it('should short-circuit AND operator', () => {
expectEval('false && a()', td(() => {throw "BOOM"})).toBe(false);
});
it('should short-circuit OR operator', () => {
expectEval('true || a()', td(() => {throw "BOOM"})).toBe(true);
});
it('should evaluate grouped expressions', () => {
expectEval("(1+2)*3").toEqual((1+2)*3);
});
it('should parse an empty string', () => {
expectEval('').toBeNull();
});
});
describe("literals", () => {
it('should evaluate array', () => {
expectEval("[1][0]").toEqual(1);
expectEval("[[1]][0][0]").toEqual(1);
expectEval("[]").toEqual([]);
expectEval("[].length").toEqual(0);
expectEval("[1, 2].length").toEqual(2);
});
it('should evaluate map', () => {
expectEval("{}").toEqual({});
expectEval("{a:'b'}['a']").toEqual('b');
expectEval("{'a':'b'}['a']").toEqual('b');
expectEval("{\"a\":'b'}['a']").toEqual('b');
expectEval("{\"a\":'b'}['a']").toEqual("b");
expectEval("{}['a']").not.toBeDefined();
expectEval("{\"a\":'b'}['invalid']").not.toBeDefined();
});
it('should only allow identifier, string, or keyword as map key', () => {
expectEvalError('{(:0}').toThrowError(new RegExp('expected identifier, keyword, or string'));
expectEvalError('{1234:0}').toThrowError(new RegExp('expected identifier, keyword, or string'));
});
});
describe("member access", () => {
it("should parse field access", () => {
expectEval("a", td(999)).toEqual(999);
expectEval("a.a", td(td(999))).toEqual(999);
});
it('should throw when accessing a field on null', () => {
expectEvalError("a.a.a").toThrowError();
});
it('should only allow identifier or keyword as member names', () => {
expectEvalError('x.(').toThrowError(new RegExp('identifier or keyword'));
expectEvalError('x. 1234').toThrowError(new RegExp('identifier or keyword'));
expectEvalError('x."foo"').toThrowError(new RegExp('identifier or keyword'));
});
it("should read a field from Locals", () => {
var locals = new Locals(null,
MapWrapper.createFromPairs([["key", "value"]]));
expectEval("key", null, locals).toEqual("value");
});
it("should handle nested Locals", () => {
var nested = new Locals(null,
MapWrapper.createFromPairs([["key", "value"]]));
var locals = new Locals(nested, MapWrapper.create());
expectEval("key", null, locals).toEqual("value");
});
it("should fall back to a regular field read when Locals "+
"does not have the requested field", () => {
var locals = new Locals(null, MapWrapper.create());
expectEval("a", td(999), locals).toEqual(999);
});
});
describe("method calls", () => {
it("should evaluate method calls", () => {
expectEval("fn()", td(0, 0, "constant")).toEqual("constant");
expectEval("add(1,2)").toEqual(3);
expectEval("a.add(1,2)", td(td())).toEqual(3);
expectEval("fn().add(1,2)", td(0, 0, td())).toEqual(3);
});
it('should throw when more than 10 arguments', () => {
expectEvalError("fn(1,2,3,4,5,6,7,8,9,10,11)").toThrowError(new RegExp('more than'));
});
it('should throw when no method', () => {
expectEvalError("blah()").toThrowError();
});
it('should evaluate a method from Locals', () => {
var locals = new Locals(
null,
MapWrapper.createFromPairs([['fn', () => 'child']])
);
expectEval("fn()", td(0, 0, 'parent'), locals).toEqual('child');
});
it('should fall back to the parent context when Locals does not ' +
'have the requested method', () => {
var locals = new Locals(null, MapWrapper.create());
expectEval("fn()", td(0, 0, 'parent'), locals).toEqual('parent');
});
});
describe("functional calls", () => {
it("should evaluate function calls", () => {
expectEval("fn()(1,2)", td(0, 0, (a, b) => a + b)).toEqual(3);
});
it('should throw on non-function function calls', () => {
expectEvalError("4()").toThrowError(new RegExp('4 is not a function'));
});
it('should parse functions for object indices', () => {
expectEval('a[b()]()', td([()=>6], () => 0)).toEqual(6);
});
});
describe("conditional", () => {
it('should parse ternary/conditional expressions', () => {
expectEval("7==3+4?10:20").toEqual(10);
expectEval("false?10:20").toEqual(20);
});
it('should throw on incorrect ternary operator syntax', () => {
expectEvalError("true?1").
toThrowError(new RegExp('Parser Error: Conditional expression true\\?1 requires all 3 expressions'));
});
});
describe("assignment", () => {
it("should support field assignments", () => {
var context = td();
expectEval("a=12", context).toEqual(12);
expect(context.a).toEqual(12);
});
it("should support nested field assignments", () => {
var context = td(td(td()));
expectEval("a.a.a=123;", context).toEqual(123);
expect(context.a.a.a).toEqual(123);
});
it("should support multiple assignments", () => {
var context = td();
expectEval("a=123; b=234", context).toEqual(234);
expect(context.a).toEqual(123);
expect(context.b).toEqual(234);
});
it("should support array updates", () => {
var context = td([100]);
expectEval('a[0] = 200', context).toEqual(200);
expect(context.a[0]).toEqual(200);
});
it("should support map updates", () => {
var context = td({"key" : 100});
expectEval('a["key"] = 200', context).toEqual(200);
expect(context.a["key"]).toEqual(200);
});
it("should support array/map updates", () => {
var context = td([{"key" : 100}]);
expectEval('a[0]["key"] = 200', context).toEqual(200);
expect(context.a[0]["key"]).toEqual(200);
});
it('should allow assignment after array dereference', () => {
var context = td([td()]);
expectEval('a[0].a = 200', context).toEqual(200);
expect(context.a[0].a).toEqual(200);
});
it('should throw on bad assignment', () => {
expectEvalError("5=4").toThrowError(new RegExp("Expression 5 is not assignable"));
});
it('should reassign when no variable binding with the given name', () => {
var context = td();
var locals = new Locals(null, MapWrapper.create());
expectEval('a = 200', context, locals).toEqual(200);
expect(context.a).toEqual(200);
});
it('should throw when reassigning a variable binding', () => {
var locals = new Locals(null, MapWrapper.createFromPairs([["key", "value"]]));
expectEvalError('key = 200', null, locals).toThrowError(new RegExp("Cannot reassign a variable binding"));
});
});
describe("general error handling", () => {
it("should throw on an unexpected token", () => {
expectEvalError("[1,2] trac")
.toThrowError(new RegExp('Unexpected token \'trac\''));
});
it('should throw a reasonable error for unconsumed tokens', () => {
expectEvalError(")").toThrowError(new RegExp("Unexpected token \\) at column 1 in \\[\\)\\]"));
});
it('should throw on missing expected token', () => {
expectEvalError("a(b").toThrowError(new RegExp("Missing expected \\) at the end of the expression \\[a\\(b\\]"));
});
});
it("should error when using pipes", () => {
expectEvalError('x|blah').toThrowError(new RegExp('Cannot have a pipe'));
});
it('should pass exceptions', () => {
expect(() => {
parseAction('a()').eval(td(() => {throw new BaseException("boo to you")}), emptyLocals());
}).toThrowError('boo to you');
});
describe("multiple statements", () => {
it("should return the last non-blank value", () => {
expectEval("a=1;b=3;a+b").toEqual(4);
expectEval("1;;").toEqual(1);
});
});
it('should store the source in the result', () => {
expect(parseAction('someExpr').source).toBe('someExpr');
});
it('should store the passed-in location', () => {
expect(parseAction('someExpr', 'location').location).toBe('location');
});
});
describe("parseBinding", () => {
describe("pipes", () => {
it("should parse pipes", () => {
var exp = parseBinding("'Foo'|uppercase").ast;
expect(exp).toBeAnInstanceOf(Pipe);
expect(exp.name).toEqual("uppercase");
});
it("should parse pipes in the middle of a binding", () => {
var exp = parseBinding("user|a|b.name").ast;
expect(exp.name).toEqual("name");
expect(exp.receiver).toBeAnInstanceOf(Pipe);
expect(exp.receiver.name).toEqual("b");
expect(exp.receiver.exp).toBeAnInstanceOf(Pipe);
expect(exp.receiver.exp.name).toEqual("a");
});
it("should parse pipes with args", () => {
var exp = parseBinding("(1|a:2)|b:3").ast;
expect(exp).toBeAnInstanceOf(Pipe);
expect(exp.name).toEqual("b");
expect(exp.args[0]).toBeAnInstanceOf(LiteralPrimitive);
expect(exp.exp).toBeAnInstanceOf(Pipe);
expect(exp.exp.name).toEqual("a");
expect(exp.exp.args[0]).toBeAnInstanceOf(LiteralPrimitive);
expect(exp.exp.exp).toBeAnInstanceOf(LiteralPrimitive);
});
it('should only allow identifier or keyword as formatter names', () => {
expect(() => parseBinding('"Foo"|(')).toThrowError(new RegExp('identifier or keyword'));
expect(() => parseBinding('"Foo"|1234')).toThrowError(new RegExp('identifier or keyword'));
expect(() => parseBinding('"Foo"|"uppercase"')).toThrowError(new RegExp('identifier or keyword'));
});
});
it('should store the source in the result', () => {
expect(parseBinding('someExpr').source).toBe('someExpr');
});
it('should store the passed-in location', () => {
expect(parseBinding('someExpr', 'location').location).toBe('location');
});
it('should throw on chain expressions', () => {
expect(() => parseBinding("1;2")).toThrowError(new RegExp("contain chained expression"));
});
it('should throw on assignmnt', () => {
expect(() => parseBinding("1;2")).toThrowError(new RegExp("contain chained expression"));
});
});
describe('parseTemplateBindings', () => {
function keys(templateBindings) {
return ListWrapper.map(templateBindings, (binding) => binding.key );
}
function keyValues(templateBindings) {
return ListWrapper.map(templateBindings, (binding) => {
if (binding.keyIsVar) {
return '#' + binding.key + (isBlank(binding.name) ? '' : '=' + binding.name);
} else {
return binding.key + (isBlank(binding.expression) ? '' : `=${binding.expression}`)
}
});
}
function exprSources(templateBindings) {
return ListWrapper.map(templateBindings,
(binding) => isPresent(binding.expression) ? binding.expression.source : null );
}
function exprAsts(templateBindings) {
return ListWrapper.map(templateBindings,
(binding) => isPresent(binding.expression) ? binding.expression : null );
}
it('should parse an empty string', () => {
var bindings = parseTemplateBindings('');
expect(bindings).toEqual([]);
});
it('should parse a string without a value', () => {
var bindings = parseTemplateBindings('a');
expect(keys(bindings)).toEqual(['a']);
});
it('should only allow identifier, string, or keyword including dashes as keys', () => {
var bindings = parseTemplateBindings("a:'b'");
expect(keys(bindings)).toEqual(['a']);
bindings = parseTemplateBindings("'a':'b'");
expect(keys(bindings)).toEqual(['a']);
bindings = parseTemplateBindings("\"a\":'b'");
expect(keys(bindings)).toEqual(['a']);
bindings = parseTemplateBindings("a-b:'c'");
expect(keys(bindings)).toEqual(['a-b']);
expect( () => {
parseTemplateBindings('(:0');
}).toThrowError(new RegExp('expected identifier, keyword, or string'));
expect( () => {
parseTemplateBindings('1234:0');
}).toThrowError(new RegExp('expected identifier, keyword, or string'));
});
it('should detect expressions as value', () => {
var bindings = parseTemplateBindings("a:b");
expect(exprSources(bindings)).toEqual(['b']);
expect(evalAsts(exprAsts(bindings), td(0, 23))).toEqual([23]);
bindings = parseTemplateBindings("a:1+1");
expect(exprSources(bindings)).toEqual(['1+1']);
expect(evalAsts(exprAsts(bindings))).toEqual([2]);
});
it('should detect names as value', () => {
var bindings = parseTemplateBindings("a:#b");
expect(keyValues(bindings)).toEqual(['a', '#b']);
});
it('should allow space and colon as separators', () => {
var bindings = parseTemplateBindings("a:b");
expect(keys(bindings)).toEqual(['a']);
expect(exprSources(bindings)).toEqual(['b']);
bindings = parseTemplateBindings("a b");
expect(keys(bindings)).toEqual(['a']);
expect(exprSources(bindings)).toEqual(['b']);
});
it('should allow multiple pairs', () => {
var bindings = parseTemplateBindings("a 1 b 2");
expect(keys(bindings)).toEqual(['a', 'b']);
expect(exprSources(bindings)).toEqual(['1 ', '2']);
});
it('should store the sources in the result', () => {
var bindings = parseTemplateBindings("a 1,b 2");
expect(bindings[0].expression.source).toEqual('1');
expect(bindings[1].expression.source).toEqual('2');
});
it('should store the passed-in location', () => {
var bindings = parseTemplateBindings("a 1,b 2", 'location');
expect(bindings[0].expression.location).toEqual('location');
});
it('should support var/# notation', () => {
var bindings = parseTemplateBindings("var i");
expect(keyValues(bindings)).toEqual(['#i']);
bindings = parseTemplateBindings("#i");
expect(keyValues(bindings)).toEqual(['#i']);
bindings = parseTemplateBindings("var i-a = k-a");
expect(keyValues(bindings)).toEqual(['#i-a=k-a']);
bindings = parseTemplateBindings("keyword var item; var i = k");
expect(keyValues(bindings)).toEqual(['keyword', '#item=\$implicit', '#i=k']);
bindings = parseTemplateBindings("keyword: #item; #i = k");
expect(keyValues(bindings)).toEqual(['keyword', '#item=\$implicit', '#i=k']);
bindings = parseTemplateBindings("directive: var item in expr; var a = b", 'location');
expect(keyValues(bindings)).toEqual(['directive', '#item=\$implicit', 'in=expr in location', '#a=b']);
});
it('should parse pipes', () => {
var bindings = parseTemplateBindings('key value|pipe');
var ast = bindings[0].expression.ast
expect(ast).toBeAnInstanceOf(Pipe);
});
});
describe('parseInterpolation', () => {
it('should return null if no interpolation', () => {
expect(parseInterpolation('nothing')).toBe(null);
});
it('should parse no prefix/suffix interpolation', () => {
var ast = parseInterpolation('{{a}}').ast;
expect(ast.strings).toEqual(['', '']);
expect(ast.expressions.length).toEqual(1);
expect(ast.expressions[0].name).toEqual('a');
});
it('should parse prefix/suffix with multiple interpolation', () => {
var ast = parseInterpolation('before{{a}}middle{{b}}after').ast;
expect(ast.strings).toEqual(['before', 'middle', 'after']);
expect(ast.expressions.length).toEqual(2);
expect(ast.expressions[0].name).toEqual('a');
expect(ast.expressions[1].name).toEqual('b');
});
});
describe('addPipes', () => {
it('should return the given ast whe the list of pipes is empty', () => {
var ast = parseBinding("1 + 1", "Location");
var transformedAst = addPipes(ast, []);
expect(transformedAst).toBe(ast);
});
it('should append pipe ast nodes', () => {
var ast = parseBinding("1 + 1", "Location");
var transformedAst = addPipes(ast, ['one', 'two']);
expect(transformedAst.ast.name).toEqual("two");
expect(transformedAst.ast.exp.name).toEqual("one");
expect(transformedAst.ast.exp.exp.operation).toEqual("+");
});
it('should preserve location and source', () => {
var ast = parseBinding("1 + 1", "Location");
var transformedAst = addPipes(ast, ['one', 'two']);
expect(transformedAst.source).toEqual("1 + 1");
expect(transformedAst.location).toEqual("Location");
});
});
describe('wrapLiteralPrimitive', () => {
it('should wrap a literal primitive', () => {
expect(createParser().wrapLiteralPrimitive("foo", null).eval(null, emptyLocals())).toEqual("foo");
});
});
});
}