examin/assert.js at master · oliverdodd/examin · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/*	assert.js - assertion javascript object
 *
 * Copyright (c) 2010 Oliver C Dodd [http://01001111.net]
 * Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
 */
Assert = {
	msg: function(defaultMessage,provided) {
		return (provided === undefined) ? defaultMessage : provided;
	},
	fail: function(message) {
		throw(new AssertionException(message));
	}
};
Assert.containsKey = function(arrayOrObject,key,message) {
	message = Assert.msg("array or object contains key ("+key+")", message);
	return Assert.isTrue(arrayOrObject[key] != undefined, message);
};
Assert.equals = function(a,b,message) {
	message = Assert.msg(a+" === "+b, message);
	return Assert.isTrue(a === b, message);
};
Assert.functionReturns = function(func,expected,message) {
	message = Assert.msg(a+" returns "+b, message);
	try {
		var r = func();
		return Assert.equals(r,expected);
	} catch(e) {
		Assert.fail("error evaluating function ("+func+"): "+e);
	}
};
Assert.greaterThan = function(a,b,message) {
	message = Assert.msg(a+" > "+b, message);
	return Assert.isTrue(a > b, message);
};
Assert.greaterThanOrEqualTo = function(a,b,message) {
	message = Assert.msg(a+" >= "+b, message);
	return Assert.isTrue(a >= b, message);
};
Assert.isBlank = function(a,message) {
	message = Assert.msg("is blank", message);
	return Assert.equals(a, "", message);
};
Assert.isFalse = function(a,message) {
	message = Assert.msg("condition evaluates to false", message);
	return a ? Assert.fail(message) : true;
};
Assert.isNull = function(a,message) {
	message = Assert.msg("is null", message);
	return Assert.equals(a, null, message);
};
Assert.isNumber = function(a,message) {
	message = Assert.msg("is number", message);
	return Assert.isTrue(!isNaN(a), message);
};
Assert.isTrue = function(a,message) {
	message = Assert.msg("condition evaluates to true", message);
	return a ? true : Assert.fail(message);
};
Assert.isUndefined = function(a,message) {
	message = Assert.msg("is undefined", message);
	return Assert.equals(a, undefined, message);
};
Assert.lessThan = function(a,b,message) {
	message = Assert.msg(a+" < "+b, message);
	return Assert.isTrue(a < b, message);
};
Assert.lessThanOrEqualTo = function(a,b,message) {
	message = Assert.msg(a+" <= "+b, message);
	return Assert.isTrue(a <= b, message);
};
Assert.notBlank = function(a,message) {
	message = Assert.msg("not blank", message);
	return Assert.notEqual(a, "", message);
};
Assert.notEqual = function(a,b,message) {
	message = Assert.msg(a+" != "+b, message);
	return Assert.isTrue(a !== b, message);
};
Assert.notNull = function(a,message) {
	message = Assert.msg("not null", message);
	return Assert.notEqual(a, null, message);
};
Assert.notNumber = function(a,message) {
	message = Assert.msg("not number", message);
	return Assert.isTrue(isNaN(a), message);
};
Assert.notSame = function(a,b,message) {
	message = Assert.msg(a+" != "+b, message);
	return Assert.isTrue(a != b, message);
};
Assert.notUndefined = function(a,message) {
	message = Assert.msg("not undefined", message);
	return Assert.notEqual(a, undefined, message);
};
Assert.same = function(a,b,message) {
	message = Assert.msg(a+" == "+b, message);
	return Assert.isTrue(a == b, message);
};
Assert.stringEndsWith = function(s,end,message) {
	message = Assert.msg("string ends with "+end, message);
	return Assert.equals(s.lastIndexOf(end), s.length - end.length, message);
};
Assert.stringStartsWith = function(s,start,message) {
	message = Assert.msg("string starts with "+start, message);
	return Assert.equals(s.indexOf(start), 0, message);
};

AssertionException = function(msg) {
	this.name = "AssertionException";
	this.message = msg;
	this.getErrorLocation();
};
AssertionException.prototype.getErrorLocation = function() {
	var thisFile = null;
	var stack = (new Error().stack).split("\n");
	for (var i in stack) {
		var call = (/(\([^\(]*\))@(.+):([\d]+)/).exec(stack[i]);
		if (call && call.length == 4) {
			var f = call[2];
			var l = call[3];
			if (thisFile == null) {
				thisFile = f;
			} else if (thisFile != f) {
				this.fileName = f;
				this.lineNumber = l;
				return;
			}
		}
	}
};