mirror of
https://github.com/Hopiu/angular.js.git
synced 2026-03-17 23:40:23 +00:00
78b6e8a446
Parser now builds expressions that can detect promises and transparently
evaluate them to undefined or the promise value.
If promiseA is resolved with value 'A', then {{promiseA}} evals to 'A';
If promiseA is unresolved, then {{promiseA}} evals to undefined;
Following invocations are supported:
- {{promise}}
- {{promise.futureProp}}
- {{[promise][0]}}
- {{object.promise}}
- {{object[promise]}}
- {{array[promise]}}
- {{fn(promise)}}
- combinations of the above
584 lines
18 KiB
JavaScript
584 lines
18 KiB
JavaScript
'use strict';
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describe('parser', function() {
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describe('lexer', function() {
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it('should tokenize a string', function() {
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var tokens = lex("a.bc[22]+1.3|f:'a\\\'c':\"d\\\"e\"");
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var i = 0;
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expect(tokens[i].index).toEqual(0);
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expect(tokens[i].text).toEqual('a.bc');
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i++;
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expect(tokens[i].index).toEqual(4);
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expect(tokens[i].text).toEqual('[');
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i++;
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expect(tokens[i].index).toEqual(5);
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expect(tokens[i].text).toEqual(22);
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i++;
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expect(tokens[i].index).toEqual(7);
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expect(tokens[i].text).toEqual(']');
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i++;
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expect(tokens[i].index).toEqual(8);
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expect(tokens[i].text).toEqual('+');
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i++;
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expect(tokens[i].index).toEqual(9);
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expect(tokens[i].text).toEqual(1.3);
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i++;
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expect(tokens[i].index).toEqual(12);
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expect(tokens[i].text).toEqual('|');
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i++;
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expect(tokens[i].index).toEqual(13);
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expect(tokens[i].text).toEqual('f');
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i++;
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expect(tokens[i].index).toEqual(14);
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expect(tokens[i].text).toEqual(':');
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i++;
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expect(tokens[i].index).toEqual(15);
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expect(tokens[i].string).toEqual("a'c");
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i++;
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expect(tokens[i].index).toEqual(21);
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expect(tokens[i].text).toEqual(':');
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i++;
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expect(tokens[i].index).toEqual(22);
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expect(tokens[i].string).toEqual('d"e');
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});
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it('should tokenize undefined', function() {
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var tokens = lex("undefined");
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var i = 0;
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expect(tokens[i].index).toEqual(0);
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expect(tokens[i].text).toEqual('undefined');
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expect(undefined).toEqual(tokens[i].fn());
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});
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it('should tokenize quoted string', function() {
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var str = "['\\'', \"\\\"\"]";
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var tokens = lex(str);
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expect(tokens[1].index).toEqual(1);
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expect(tokens[1].string).toEqual("'");
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expect(tokens[3].index).toEqual(7);
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expect(tokens[3].string).toEqual('"');
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});
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it('should tokenize escaped quoted string', function() {
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var str = '"\\"\\n\\f\\r\\t\\v\\u00A0"';
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var tokens = lex(str);
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expect(tokens[0].string).toEqual('"\n\f\r\t\v\u00A0');
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});
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it('should tokenize unicode', function() {
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var tokens = lex('"\\u00A0"');
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expect(tokens.length).toEqual(1);
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expect(tokens[0].string).toEqual('\u00a0');
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});
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it('should ignore whitespace', function() {
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var tokens = lex("a \t \n \r b");
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expect(tokens[0].text).toEqual('a');
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expect(tokens[1].text).toEqual('b');
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});
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it('should tokenize relation', function() {
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var tokens = lex("! == != < > <= >=");
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expect(tokens[0].text).toEqual('!');
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expect(tokens[1].text).toEqual('==');
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expect(tokens[2].text).toEqual('!=');
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expect(tokens[3].text).toEqual('<');
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expect(tokens[4].text).toEqual('>');
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expect(tokens[5].text).toEqual('<=');
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expect(tokens[6].text).toEqual('>=');
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});
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it('should tokenize statements', function() {
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var tokens = lex("a;b;");
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expect(tokens[0].text).toEqual('a');
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expect(tokens[1].text).toEqual(';');
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expect(tokens[2].text).toEqual('b');
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expect(tokens[3].text).toEqual(';');
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});
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it('should tokenize number', function() {
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var tokens = lex("0.5");
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expect(tokens[0].text).toEqual(0.5);
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});
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it('should tokenize negative number', inject(function($rootScope) {
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var value = $rootScope.$eval("-0.5");
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expect(value).toEqual(-0.5);
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value = $rootScope.$eval("{a:-0.5}");
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expect(value).toEqual({a:-0.5});
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}));
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it('should tokenize number with exponent', inject(function($rootScope) {
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var tokens = lex("0.5E-10");
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expect(tokens[0].text).toEqual(0.5E-10);
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expect($rootScope.$eval("0.5E-10")).toEqual(0.5E-10);
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tokens = lex("0.5E+10");
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expect(tokens[0].text).toEqual(0.5E+10);
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}));
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it('should throws exception for invalid exponent', function() {
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expect(function() {
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lex("0.5E-");
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}).toThrow(new Error('Lexer Error: Invalid exponent at column 4 in expression [0.5E-].'));
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expect(function() {
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lex("0.5E-A");
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}).toThrow(new Error('Lexer Error: Invalid exponent at column 4 in expression [0.5E-A].'));
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});
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it('should tokenize number starting with a dot', function() {
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var tokens = lex(".5");
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expect(tokens[0].text).toEqual(0.5);
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});
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it('should throw error on invalid unicode', function() {
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expect(function() {
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lex("'\\u1''bla'");
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}).toThrow(new Error("Lexer Error: Invalid unicode escape [\\u1''b] at column 2 in expression ['\\u1''bla']."));
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});
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});
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var scope;
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beforeEach(inject(function ($rootScope) {
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scope = $rootScope;
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}));
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it('should parse expressions', function() {
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expect(scope.$eval("-1")).toEqual(-1);
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expect(scope.$eval("1 + 2.5")).toEqual(3.5);
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expect(scope.$eval("1 + -2.5")).toEqual(-1.5);
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expect(scope.$eval("1+2*3/4")).toEqual(1+2*3/4);
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expect(scope.$eval("0--1+1.5")).toEqual(0- -1 + 1.5);
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expect(scope.$eval("-0--1++2*-3/-4")).toEqual(-0- -1+ +2*-3/-4);
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expect(scope.$eval("1/2*3")).toEqual(1/2*3);
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});
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it('should parse comparison', function() {
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expect(scope.$eval("false")).toBeFalsy();
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expect(scope.$eval("!true")).toBeFalsy();
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expect(scope.$eval("1==1")).toBeTruthy();
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expect(scope.$eval("1!=2")).toBeTruthy();
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expect(scope.$eval("1<2")).toBeTruthy();
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expect(scope.$eval("1<=1")).toBeTruthy();
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expect(scope.$eval("1>2")).toEqual(1>2);
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expect(scope.$eval("2>=1")).toEqual(2>=1);
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expect(scope.$eval("true==2<3")).toEqual(true === 2<3);
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});
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it('should parse logical', function() {
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expect(scope.$eval("0&&2")).toEqual(0&&2);
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expect(scope.$eval("0||2")).toEqual(0||2);
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expect(scope.$eval("0||1&&2")).toEqual(0||1&&2);
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});
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it('should parse string', function() {
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expect(scope.$eval("'a' + 'b c'")).toEqual("ab c");
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});
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it('should parse filters', inject(function($filterProvider) {
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$filterProvider.register('substring', valueFn(function(input, start, end) {
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return input.substring(start, end);
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}));
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expect(function() {
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scope.$eval("1|nonexistent");
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}).toThrow(new Error("Unknown provider for 'nonexistent$Filter'."));
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scope.offset = 3;
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expect(scope.$eval("'abcd'|substring:1:offset")).toEqual("bc");
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expect(scope.$eval("'abcd'|substring:1:3|uppercase")).toEqual("BC");
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}));
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it('should access scope', function() {
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scope.a = 123;
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scope.b = {c: 456};
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expect(scope.$eval("a", scope)).toEqual(123);
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expect(scope.$eval("b.c", scope)).toEqual(456);
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expect(scope.$eval("x.y.z", scope)).not.toBeDefined();
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});
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it('should evaluate grouped expressions', function() {
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expect(scope.$eval("(1+2)*3")).toEqual((1+2)*3);
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});
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it('should evaluate assignments', function() {
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expect(scope.$eval("a=12")).toEqual(12);
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expect(scope.a).toEqual(12);
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expect(scope.$eval("x.y.z=123;")).toEqual(123);
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expect(scope.x.y.z).toEqual(123);
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expect(scope.$eval("a=123; b=234")).toEqual(234);
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expect(scope.a).toEqual(123);
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expect(scope.b).toEqual(234);
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});
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it('should evaluate function call without arguments', function() {
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scope['const'] = function(a,b){return 123;};
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expect(scope.$eval("const()")).toEqual(123);
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});
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it('should evaluate function call with arguments', function() {
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scope.add = function(a,b) {
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return a+b;
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};
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expect(scope.$eval("add(1,2)")).toEqual(3);
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});
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it('should evaluate multiplication and division', function() {
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scope.taxRate = 8;
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scope.subTotal = 100;
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expect(scope.$eval("taxRate / 100 * subTotal")).toEqual(8);
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expect(scope.$eval("subTotal * taxRate / 100")).toEqual(8);
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});
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it('should evaluate array', function() {
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expect(scope.$eval("[]").length).toEqual(0);
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expect(scope.$eval("[1, 2]").length).toEqual(2);
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expect(scope.$eval("[1, 2]")[0]).toEqual(1);
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expect(scope.$eval("[1, 2]")[1]).toEqual(2);
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});
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it('should evaluate array access', function() {
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expect(scope.$eval("[1][0]")).toEqual(1);
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expect(scope.$eval("[[1]][0][0]")).toEqual(1);
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expect(scope.$eval("[].length")).toEqual(0);
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expect(scope.$eval("[1, 2].length")).toEqual(2);
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});
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it('should evaluate object', function() {
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expect(toJson(scope.$eval("{}"))).toEqual("{}");
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expect(toJson(scope.$eval("{a:'b'}"))).toEqual('{"a":"b"}');
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expect(toJson(scope.$eval("{'a':'b'}"))).toEqual('{"a":"b"}');
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expect(toJson(scope.$eval("{\"a\":'b'}"))).toEqual('{"a":"b"}');
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});
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it('should evaluate object access', function() {
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expect(scope.$eval("{false:'WC', true:'CC'}[false]")).toEqual("WC");
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});
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it('should evaluate JSON', function() {
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expect(toJson(scope.$eval("[{}]"))).toEqual("[{}]");
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expect(toJson(scope.$eval("[{a:[]}, {b:1}]"))).toEqual('[{"a":[]},{"b":1}]');
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});
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it('should evaluate multipple statements', function() {
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expect(scope.$eval("a=1;b=3;a+b")).toEqual(4);
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expect(scope.$eval(";;1;;")).toEqual(1);
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});
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it('should evaluate object methods in correct context (this)', function() {
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var C = function () {
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this.a = 123;
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};
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C.prototype.getA = function() {
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return this.a;
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};
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scope.obj = new C();
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expect(scope.$eval("obj.getA()")).toEqual(123);
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});
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it('should evaluate methods in correct context (this) in argument', function() {
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var C = function () {
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this.a = 123;
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};
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C.prototype.sum = function(value) {
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return this.a + value;
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};
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C.prototype.getA = function() {
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return this.a;
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};
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scope.obj = new C();
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expect(scope.$eval("obj.sum(obj.getA())")).toEqual(246);
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});
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it('should evaluate objects on scope context', function() {
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scope.a = "abc";
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expect(scope.$eval("{a:a}").a).toEqual("abc");
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});
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it('should evaluate field access on function call result', function() {
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scope.a = function() {
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return {name:'misko'};
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};
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expect(scope.$eval("a().name")).toEqual("misko");
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});
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it('should evaluate field access after array access', function () {
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scope.items = [{}, {name:'misko'}];
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expect(scope.$eval('items[1].name')).toEqual("misko");
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});
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it('should evaluate array assignment', function() {
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scope.items = [];
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expect(scope.$eval('items[1] = "abc"')).toEqual("abc");
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expect(scope.$eval('items[1]')).toEqual("abc");
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// Dont know how to make this work....
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// expect(scope.$eval('books[1] = "moby"')).toEqual("moby");
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// expect(scope.$eval('books[1]')).toEqual("moby");
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});
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it('should evaluate grouped filters', function() {
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scope.name = 'MISKO';
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expect(scope.$eval('n = (name|lowercase)')).toEqual('misko');
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expect(scope.$eval('n')).toEqual('misko');
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});
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it('should evaluate remainder', function() {
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expect(scope.$eval('1%2')).toEqual(1);
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});
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it('should evaluate sum with undefined', function() {
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expect(scope.$eval('1+undefined')).toEqual(1);
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expect(scope.$eval('undefined+1')).toEqual(1);
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});
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it('should throw exception on non-closed bracket', function() {
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expect(function() {
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scope.$eval('[].count(');
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}).toThrow('Unexpected end of expression: [].count(');
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});
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it('should evaluate double negation', function() {
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expect(scope.$eval('true')).toBeTruthy();
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expect(scope.$eval('!true')).toBeFalsy();
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expect(scope.$eval('!!true')).toBeTruthy();
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expect(scope.$eval('{true:"a", false:"b"}[!!true]')).toEqual('a');
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});
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it('should evaluate negation', function() {
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expect(scope.$eval("!false || true")).toEqual(!false || true);
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expect(scope.$eval("!11 == 10")).toEqual(!11 == 10);
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expect(scope.$eval("12/6/2")).toEqual(12/6/2);
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});
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it('should evaluate exclamation mark', function() {
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expect(scope.$eval('suffix = "!"')).toEqual('!');
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});
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it('should evaluate minus', function() {
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expect(scope.$eval("{a:'-'}")).toEqual({a: "-"});
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});
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it('should evaluate undefined', function() {
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expect(scope.$eval("undefined")).not.toBeDefined();
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expect(scope.$eval("a=undefined")).not.toBeDefined();
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expect(scope.a).not.toBeDefined();
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});
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it('should allow assignment after array dereference', function() {
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scope.obj = [{}];
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scope.$eval('obj[0].name=1');
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expect(scope.obj.name).toBeUndefined();
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expect(scope.obj[0].name).toEqual(1);
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});
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it('should short-circuit AND operator', function() {
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scope.run = function() {
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throw "IT SHOULD NOT HAVE RUN";
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};
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expect(scope.$eval('false && run()')).toBe(false);
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});
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it('should short-circuit OR operator', function() {
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scope.run = function() {
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throw "IT SHOULD NOT HAVE RUN";
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};
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expect(scope.$eval('true || run()')).toBe(true);
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});
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describe('promises', function() {
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var deferred, promise, q;
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beforeEach(inject(function($q) {
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q = $q;
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deferred = q.defer();
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promise = deferred.promise;
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}));
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describe('{{promise}}', function() {
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it('should evaluated resolved promise and get its value', function() {
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deferred.resolve('hello!');
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scope.greeting = promise;
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expect(scope.$eval('greeting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe('hello!');
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});
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it('should evaluated rejected promise and ignore the rejection reason', function() {
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deferred.reject('sorry');
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scope.greeting = promise;
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expect(scope.$eval('gretting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe(undefined);
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});
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it('should evaluate a promise and eventualy get its value', function() {
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scope.greeting = promise;
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expect(scope.$eval('greeting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe(undefined);
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deferred.resolve('hello!');
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expect(scope.$eval('greeting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe('hello!');
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});
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it('should evaluate a promise and eventualy ignore its rejection', function() {
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scope.greeting = promise;
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expect(scope.$eval('greeting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe(undefined);
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deferred.reject('sorry');
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expect(scope.$eval('greeting')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('greeting')).toBe(undefined);
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});
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});
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describe('dereferencing', function() {
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it('should evaluate and dereference properties leading to and from a promise', function() {
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scope.obj = {greeting: promise};
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expect(scope.$eval('obj.greeting')).toBe(undefined);
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expect(scope.$eval('obj.greeting.polite')).toBe(undefined);
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scope.$digest();
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expect(scope.$eval('obj.greeting')).toBe(undefined);
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expect(scope.$eval('obj.greeting.polite')).toBe(undefined);
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deferred.resolve({polite: 'Good morning!'});
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scope.$digest();
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expect(scope.$eval('obj.greeting')).toEqual({polite: 'Good morning!'});
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expect(scope.$eval('obj.greeting.polite')).toBe('Good morning!');
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});
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it('should evaluate and dereference properties leading to and from a promise via bracket ' +
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|
'notation', function() {
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|
scope.obj = {greeting: promise};
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|
expect(scope.$eval('obj["greeting"]')).toBe(undefined);
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|
expect(scope.$eval('obj["greeting"]["polite"]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('obj["greeting"]')).toBe(undefined);
|
|
expect(scope.$eval('obj["greeting"]["polite"]')).toBe(undefined);
|
|
|
|
deferred.resolve({polite: 'Good morning!'});
|
|
scope.$digest();
|
|
expect(scope.$eval('obj["greeting"]')).toEqual({polite: 'Good morning!'});
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|
expect(scope.$eval('obj["greeting"]["polite"]')).toBe('Good morning!');
|
|
});
|
|
|
|
|
|
it('should evaluate and dereference array references leading to and from a promise',
|
|
function() {
|
|
scope.greetings = [promise];
|
|
expect(scope.$eval('greetings[0]')).toBe(undefined);
|
|
expect(scope.$eval('greetings[0][0]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('greetings[0]')).toBe(undefined);
|
|
expect(scope.$eval('greetings[0][0]')).toBe(undefined);
|
|
|
|
deferred.resolve(['Hi!', 'Cau!']);
|
|
scope.$digest();
|
|
expect(scope.$eval('greetings[0]')).toEqual(['Hi!', 'Cau!']);
|
|
expect(scope.$eval('greetings[0][0]')).toBe('Hi!');
|
|
});
|
|
|
|
|
|
it('should evaluate and dereference promises used as function arguments', function() {
|
|
scope.greet = function(name) { return 'Hi ' + name + '!'; };
|
|
scope.name = promise;
|
|
expect(scope.$eval('greet(name)')).toBe('Hi undefined!');
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('greet(name)')).toBe('Hi undefined!');
|
|
|
|
deferred.resolve('Veronica');
|
|
expect(scope.$eval('greet(name)')).toBe('Hi undefined!');
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('greet(name)')).toBe('Hi Veronica!');
|
|
});
|
|
|
|
|
|
it('should evaluate and dereference promises used as array indexes', function() {
|
|
scope.childIndex = promise;
|
|
scope.kids = ['Adam', 'Veronica', 'Elisa'];
|
|
expect(scope.$eval('kids[childIndex]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('kids[childIndex]')).toBe(undefined);
|
|
|
|
deferred.resolve(1);
|
|
expect(scope.$eval('kids[childIndex]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('kids[childIndex]')).toBe('Veronica');
|
|
});
|
|
|
|
|
|
it('should evaluate and dereference promises used as keys in bracket notation', function() {
|
|
scope.childKey = promise;
|
|
scope.kids = {'a': 'Adam', 'v': 'Veronica', 'e': 'Elisa'};
|
|
|
|
expect(scope.$eval('kids[childKey]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('kids[childKey]')).toBe(undefined);
|
|
|
|
deferred.resolve('v');
|
|
expect(scope.$eval('kids[childKey]')).toBe(undefined);
|
|
|
|
scope.$digest();
|
|
expect(scope.$eval('kids[childKey]')).toBe('Veronica');
|
|
});
|
|
|
|
|
|
it('should not mess with the promise if it was not directly evaluated', function() {
|
|
scope.obj = {greeting: promise, username: 'hi'};
|
|
var obj = scope.$eval('obj');
|
|
expect(obj.username).toEqual('hi');
|
|
expect(typeof obj.greeting.then).toBe('function');
|
|
});
|
|
});
|
|
});
|
|
|
|
|
|
describe('assignable', function() {
|
|
it('should expose assignment function', inject(function($parse) {
|
|
var fn = $parse('a');
|
|
expect(fn.assign).toBeTruthy();
|
|
var scope = {};
|
|
fn.assign(scope, 123);
|
|
expect(scope).toEqual({a:123});
|
|
}));
|
|
});
|
|
});
|