Reduce duplication

Some would also say it'd be a good idea not to put random stuff in the
global namespace. One day I'll figure it out.

source/scripts/tests/reader/_abstract.coffee

@@ -0,0 +1,6 @@
+this.testReader = (name, testCases) ->
+    injector = angular.injector(["ng", "sideBySide"])
+    reader = injector.get(name)
+
+    for testCase in testCases
+        deepEqual(reader(testCase.tested), testCase.expected)

source/scripts/tests/reader/json.coffee

@@ -1,7 +1,4 @@
 test("jsonReader", () ->
-    injector = angular.injector(["ng", "sideBySide"])
-    jsonReader = injector.get("jsonReader")
-
     testCases = [{
         tested: """
             {
@@ -28,6 +25,5 @@ test("jsonReader", () ->
         }
     }]
 
-    for testCase in testCases
-        deepEqual(jsonReader(testCase.tested), testCase.expected)
+    testReader("jsonReader", testCases)
 )

source/scripts/tests/reader/markdown.coffee

@@ -1,7 +1,4 @@
 test("markdownReader", () ->
-    injector = angular.injector(["ng", "sideBySide"])
-    markdownReader = injector.get("markdownReader")
-
     testCases = [{
         tested: """
             Title: Universal Declaration of Human Rights
@@ -73,6 +70,5 @@ test("markdownReader", () ->
         }
     }]
 
-    for testCase in testCases
-        deepEqual(markdownReader(testCase.tested), testCase.expected)
+    testReader("markdownReader", testCases)
 )