Add tests for ol.ImageUrlFunction

test/spec/ol/imageurlfunction.test.js

@@ -0,0 +1,101 @@
+goog.provide('ol.test.ImageUrlFunction');
+
+describe('ol.ImageUrlFunction', function() {
+
+  describe('#createFromParamsFunction', function() {
+
+    it('is a defined function', function() {
+      expect(ol.ImageUrlFunction.createFromParamsFunction).to.not.be(undefined);
+      expect(ol.ImageUrlFunction.createFromParamsFunction).to.be.a(Function);
+    });
+
+    it('returns a function that throws when called (no arguments)', function() {
+      var got = ol.ImageUrlFunction.createFromParamsFunction();
+      expect(function() {
+        got();
+      }).to.throwException();
+    });
+
+    it('returns a function that doesn\'t throw when called (valid arguments)',
+        function() {
+          var baseUrl = 'foo',
+              params = {foo: 'bar'},
+              paramsFunction = sinon.spy(),
+              got = ol.ImageUrlFunction.createFromParamsFunction(baseUrl,
+                  params, paramsFunction);
+
+          expect(function() {
+            got();
+          }).to.not.throwException();
+        }
+    );
+
+    it('passes given baseUrl to given paramsFunction', function() {
+      var baseUrl = 'foo',
+          params = {foo: 'bar'},
+          spy = sinon.spy(),
+          got = ol.ImageUrlFunction.createFromParamsFunction(baseUrl, params,
+              spy);
+
+      got();
+
+      expect(spy.called).to.be(true);
+      expect(spy.calledOnce).to.be(true);
+      expect(spy.calledWith(baseUrl)).to.be(true);
+    });
+
+    it('passes given params to given paramsFunction', function() {
+      var baseUrl = 'foo',
+          params = {foo: 'bar'},
+          spy = sinon.spy(),
+          got = ol.ImageUrlFunction.createFromParamsFunction(baseUrl, params,
+              spy);
+
+      got();
+
+      expect(spy.called).to.be(true);
+      expect(spy.calledOnce).to.be(true);
+      expect(spy.calledWith(baseUrl, params)).to.be(true);
+    });
+
+    it('passes five params to given paramsFunction', function() {
+      var baseUrl = 'foo',
+          params = {foo: 'bar'},
+          extent = [1, 2, 3, 4],
+          size = [47, 11],
+          projection = ol.proj.get('CRS:84'),
+          spy = sinon.spy(),
+          firstArgs,
+          got = ol.ImageUrlFunction.createFromParamsFunction(baseUrl, params,
+              spy);
+
+      got(extent, size, projection);
+      firstArgs = spy.args[0];
+
+      expect(spy.called).to.be(true);
+      expect(spy.calledOnce).to.be(true);
+
+      expect(firstArgs.length).to.be(5);
+      expect(firstArgs).to.eql([baseUrl, params, extent, size, projection]);
+    });
+
+  });
+
+  describe('#nullImageUrlFunction', function() {
+
+    it('is a defined function', function() {
+      expect(ol.ImageUrlFunction.nullImageUrlFunction).to.not.be(undefined);
+      expect(ol.ImageUrlFunction.nullImageUrlFunction).to.be.a(Function);
+    });
+
+    it('always returns undefined', function() {
+      var got = ol.ImageUrlFunction.nullImageUrlFunction();
+      expect(got).to.be(undefined);
+    });
+
+  });
+
+});
+
+goog.require('ol.proj');
+goog.require('ol.ImageUrlFunction');