De-dup test setup

- Move environment-specific tests for toEquals into describe blocks so the check for the environment can be shared

spec/core/matchers/matchersUtilSpec.js

@@ -100,17 +100,6 @@ describe("matchersUtil", function() {
       expect(jasmineUnderTest.matchersUtil.equals(new One(), new Two())).toBe(false);
     });
 
-    if (typeof document === 'object') {
-      it("passes for equivalent objects from different frames", function() {
-        var iframe = document.createElement('iframe');
-        document.body.appendChild(iframe);
-        console.log(iframe);
-        iframe.contentWindow.eval('window.testObject = {}');
-        expect(jasmineUnderTest.matchersUtil.equals({}, iframe.contentWindow.testObject)).toBe(true);
-        document.body.removeChild(iframe);
-      });
-    }
-
     it("passes for Objects that are equivalent (simple case)", function() {
       expect(jasmineUnderTest.matchersUtil.equals({a: "foo"}, {a: "foo"})).toBe(true);
     });
@@ -167,25 +156,34 @@ describe("matchersUtil", function() {
       expect(jasmineUnderTest.matchersUtil.equals(a,b)).toBe(true);
     });
 
-    it("passes for equivalent DOM nodes", function() {
+    describe("when running in a browser", function() {
+      beforeEach(function() {
         if (typeof document === 'undefined') {
-        return;
+          pending();
         }
+      });
+
+      it("passes for equivalent DOM nodes", function() {
         var a = document.createElement("div");
-      a.setAttribute("test-attr", "attr-value")
+        a.setAttribute("test-attr", "attr-value");
         a.appendChild(document.createTextNode('test'));
 
         var b = document.createElement("div");
-      b.setAttribute("test-attr", "attr-value")
+        b.setAttribute("test-attr", "attr-value");
         b.appendChild(document.createTextNode('test'));
 
         expect(jasmineUnderTest.matchersUtil.equals(a,b)).toBe(true);
       });
 
+      it("passes for equivalent objects from different frames", function() {
+        var iframe = document.createElement('iframe');
+        document.body.appendChild(iframe);
+        iframe.contentWindow.eval('window.testObject = {}');
+        expect(jasmineUnderTest.matchersUtil.equals({}, iframe.contentWindow.testObject)).toBe(true);
+        document.body.removeChild(iframe);
+      });
+
       it("fails for DOM nodes with different attributes or child nodes", function() {
-      if (typeof document === 'undefined') {
-        return;
-      }
         var a = document.createElement("div");
         a.setAttribute("test-attr", "attr-value")
         a.appendChild(document.createTextNode('test'));
@@ -205,11 +203,16 @@ describe("matchersUtil", function() {
         a.appendChild(document.createTextNode('2'));
         expect(jasmineUnderTest.matchersUtil.equals(a,b)).toBe(true);
       });
+    });
+
+    describe("when running in Node", function() {
+      beforeEach(function() {
+        if (typeof require !== 'function') {
+          pending();
+        }
+      });
 
       it("passes for equivalent objects from different vm contexts", function() {
-      if (typeof require !== 'function') {
-        return;
-      }
         var vm = require('vm');
         var sandbox = {
           obj: null
@@ -220,10 +223,6 @@ describe("matchersUtil", function() {
       });
 
       it("passes for equivalent arrays from different vm contexts", function() {
-      if (typeof require !== 'function') {
-        return;
-      }
-
         var vm = require('vm');
         var sandbox = {
           arr: null
@@ -232,6 +231,7 @@ describe("matchersUtil", function() {
 
         expect(jasmineUnderTest.matchersUtil.equals(sandbox.arr, [1, 2])).toBe(true);
       });
+    });
 
     it("passes when Any is used", function() {
       var number = 3,