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<html>
<head>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
function test_Class(t) {
t.plan(1);
var MyClass = OpenLayers.Class({
initialize: function () {
t.ok(false, "initialize should not be called");
}
});
t.ok(true,
"defining a class does not call the constructor for the class");
}
function test_Class_constructor(t) {
t.plan(7);
var MyClass = OpenLayers.Class({
prop: null,
classProp: {'bad': 'practice'},
initialize: function(a1, a2) {
this.prop = "instance property";
t.ok(true,
"initialize is called when a new instance is created");
t.eq(a1, arg1,
"initialize is called with the proper first argument");
t.eq(a2, arg2,
"initialize is called with the proper second argument");
},
CLASS_NAME: "MyClass"
});
var arg1 = "anArg";
var arg2 = {"another": "arg"};
var myObj = new MyClass(arg1, arg2);
t.eq(MyClass.prop, null,
"creating a new instance doesn't modify the class");
t.eq(myObj.prop, "instance property",
"the new instance is assigned a property in the constructor");
t.eq(myObj["CLASS_NAME"], "MyClass",
"the new object is an instance of MyClass");
// allow for modification of class properties
MyClass.prototype.classProp.bad = "good";
t.eq(myObj.classProp.bad, "good",
"modifying a class property modifies properties of the instance");
}
function test_Class_inheritance(t) {
t.plan(7);
var BaseClass = OpenLayers.Class({
prop: "base",
initialize: function() {
t.ok(false,
"base class constructor is not called during inheritance");
},
toString: function() {
return "toString inherited";
},
CLASS_NAME: "BaseClass"
});
var ChildClass = OpenLayers.Class(BaseClass, {
initialize: function() {
t.ok(true,
"child class constructor is called in creating an instance");
},
CLASS_NAME: "ChildClass"
});
var child = new ChildClass();
t.eq(child.prop, "base",
"instance of child inherits properties from base");
t.eq(child.toString(), "toString inherited",
"instance of child inherits toString method from base");
t.eq(child["CLASS_NAME"],
"ChildClass",
"new object is an instance of the child class");
var F = OpenLayers.Class(Object, {});
t.ok(!("initialize" in Object.prototype), "no messing with non OL prototypes");
// test with an abstract class (i.e. a class that doesn't have an initialize
// method) as the parent class
var Vehicule = OpenLayers.Class({
numWheels: null
});
var Bike = OpenLayers.Class(Vehicule, {
initialize: function() {
this.numWheels = 2;
}
});
var b = new Bike();
t.ok(b instanceof Vehicule, "a bike is a vehicule");
// test inheritance with something that has a non-function initialize property
var P = OpenLayers.Class({
initialize: "foo"
});
var C = OpenLayers.Class(P, {
initialize: function() {
// pass
}
});
var c = new C();
t.eq(P.prototype.initialize, "foo", "Class restores custom initialize property.");
}
function test_Class_multiple_inheritance(t) {
t.plan(7);
var BaseClass1 = OpenLayers.Class({
override: "base1",
prop: "base1",
variable: null,
initialize: function() {
t.ok(true,
"only called when an instance of this class is created");
},
CLASS_NAME: "BaseClass1"
});
var BaseClass2 = OpenLayers.Class({
override: "base2",
initialize: function() {
t.ok(false,
"base class constructor is not called during inheritance");
},
CLASS_NAME: "BaseClass1"
});
var ChildClass = OpenLayers.Class(BaseClass1, BaseClass2, {
initialize: function(arg) {
if(this.prop == "base1") {
this.variable = "child";
}
t.ok(true,
"only child class constructor is called on initialization");
},
CLASS_NAME: "ChildClass"
});
var arg = "child";
var child = new ChildClass(arg);
t.eq(child.variable, arg,
"inheritance works before construction");
t.eq(child.prop, "base1",
"properties are inherited with multiple classes")
t.eq(child.override, "base2",
"properties are inherited in the expected order");
t.eq(child["CLASS_NAME"],
"ChildClass",
"object is an instance of child class");
var base1 = new BaseClass1();
t.eq(base1.override, "base1",
"inheritance doesn't mess with parents");
}
function test_inheritance_chain(t) {
t.plan(1);
var A = new OpenLayers.Class({
initialize: function() {
this.a = 'foo';
}
});
var B = new OpenLayers.Class(A, {});
var C = new OpenLayers.Class(B, {
initialize: function() {
B.prototype.initialize.apply(this, arguments);
this.a = this.a + 'bar';
}
});
var c = new C;
t.eq(c.a, 'foobar', 'constructor at the root is called');
}
function test_Class_isInstanceOf(t) {
t.plan(7);
var wms = new OpenLayers.Layer.WMS({});
var drag = new OpenLayers.Control.DragFeature({});
t.ok(wms instanceof OpenLayers.Layer.WMS, "isInstanceOf(WMS)");
t.ok(wms instanceof OpenLayers.Layer, "isInstanceOf(Layer)");
t.ok(!(wms instanceof OpenLayers.Format), "not isInstanceOf(Format)");
t.ok(drag instanceof OpenLayers.Control, "drag is a control");
t.ok(!(drag instanceof OpenLayers.Layer), "drag is not a layer");
//test a class with multiple inheritance
var BadClass=OpenLayers.Class(OpenLayers.Layer.WMS, OpenLayers.Control.DragFeature);
var bad = new BadClass({});
t.ok(!(bad instanceof OpenLayers.Control), "bad is a control, but it is also a layer and we cannot have two superclasses");
t.ok(bad instanceof OpenLayers.Layer, "bad is a layer, it inherits from the layer first");
}
//
// IGN's GeoPortal API overwrite prototypes of OpenLayers constructors.
// The tests below aim to cover their usage pattens.
//
// the overwrite function under test
function overwrite(C, o) {
if(typeof o.initialize === "function" &&
C === C.prototype.initialize) {
// OL 2.11
var proto = C.prototype;
var staticProps = OpenLayers.Util.extend({}, C);
C = o.initialize;
C.prototype = proto;
OpenLayers.Util.extend(C, staticProps);
}
OpenLayers.Util.extend(C.prototype, o);
return C;
}
function test_overwrite_1(t) {
// overwrite constructor
t.plan(1);
var A = OpenLayers.Class({
initialize: function() {
this.a = "foo";
}
});
A = overwrite(A, {
initialize: function() {
this.a = "bar";
}
});
var a = new A;
t.eq(a.a, "bar", "ctor overwritten");
}
function test_overwrite_2(t) {
// overwrite regular method
t.plan(1);
var A = OpenLayers.Class({
initialize: function() {
},
method: function() {
this.a = "foo";
}
});
A = overwrite(A, {
method: function() {
this.a = "bar";
}
});
var a = new A;
a.method();
t.eq(a.a, "bar", "method overwritten");
}
function test_overwrite_3(t) {
// overwrite constructor of subclass
t.plan(1);
var A = OpenLayers.Class({
initialize: function() {
this.a = "foo";
}
});
var B = OpenLayers.Class(A, {
initialize: function() {
A.prototype.initialize.call(this);
}
});
B = overwrite(B, {
initialize: function() {
A.prototype.initialize.call(this);
this.a = "bar";
}
});
var b = new B;
t.eq(b.a, "bar", "ctor overwritten");
}
function test_overwrite_4(t) {
// overwrite constructor of parent class
t.plan(1);
var A = OpenLayers.Class({
initialize: function() {
this.a = "foo";
}
});
var B = OpenLayers.Class(A, {
initialize: function() {
A.prototype.initialize.call(this);
}
});
A = overwrite(A, {
initialize: function() {
this.a = "bar";
}
});
var b = new B;
t.eq(b.a, "bar", "ctor overwritten");
}
function test_overwrite_5(t) {
// overwrite constructor of parent class, which itself
// doesn't defined "initialize"
t.plan(2);
var A = OpenLayers.Class({
initialize: function() {
this.a = "foo";
}
});
var B = OpenLayers.Class(A, {});
var _A = A;
A = overwrite(A, {
initialize: function() {
this.a = "bar";
}
});
var b = new B;
t.ok(A.prototype === _A.prototype, "A and _A share the prototype");
t.eq(b.a, "bar", "ctor overwritten");
}
function test_overwrite_6(t) {
// with static methods
t.plan(1);
var A = OpenLayers.Class({
initialize: function() {
}
});
A.staticMethod = function() {};
A = overwrite(A, {
initialize: function() {
}
});
var exc = false;
try {
A.staticMethod();
} catch(e) {
exc = true;
}
t.ok(!exc, "static method still there");
}
</script>
</head>
<body>
</body>
</html>
|
