QuickSpec: support assertions in Objective-C specs

Because exampleGroups() was defined as a class method, XCTest assetion
macros were unavailable in Objective-C specs (since they expand to
include a reference to `self`, which must be an instance of `XCTestCase`).
Redefine exampleGroups() as an instance method.

Examples/Scenester/ScenesterTests/Commit+ErrorSpec.swift

@@ -10,7 +10,7 @@ import Scenester
 import Quick
 
 class Commit_ErrorSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("commitError") {
             var code: CommitErrorCode!
 
@@ -21,15 +21,15 @@ class Commit_ErrorSpec: QuickSpec {
                     expect(error.localizedDescription).to.equal("The repo does not have any commits.")
                 }
             }
-            
+
             context("for a code of .InvalidCommit") {
                 beforeEach { code = CommitErrorCode.InvalidCommit }
                 it("returns an error") {
                     let error = Commit.commitError(code)
                     expect(error.localizedDescription).to.equal("The commit JSON is invalid.")
                 }
             }
-            
+
             context("for a code of .InvalidResponse") {
                 beforeEach { code = CommitErrorCode.InvalidResponse }
                 it("returns an error") {

Examples/Scenester/ScenesterTests/Commit+NetworkSpec.swift

@@ -10,7 +10,7 @@ import Scenester
 import Quick
 
 class Commit_NetworkSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("latestCommit") {
             context("when the request succeeds") {
                 it("calls the success block with the latest commit") {

Examples/Scenester/ScenesterTests/CommitSpec.swift

@@ -10,11 +10,11 @@ import Scenester
 import Quick
 
 class CommitSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Commit") {
             var commit: Commit!
             beforeEach { commit = Commit(message: "debt repaid", author: "jaime-lannister") }
-            
+
             describe("simpleDescription") {
                 it("returns author: 'commit message'") {
                     expect(commit.simpleDescription).to.equal("jaime-lannister: 'debt repaid'")

Quick/Core/QCKDSL.h

@@ -11,7 +11,7 @@
 #define QuickSpecBegin(name) \
     @interface name : QuickSpec; @end \
     @implementation name \
-    + (void)exampleGroups { \
+    - (void)exampleGroups { \
 
 
 #define QuickSpecEnd \

Quick/Core/QuickSpec.h

@@ -51,6 +51,6 @@
 
  See DSL.swift for more information on what syntax is available.
  */
-+ (void)exampleGroups;
+- (void)exampleGroups;
 
 @end

Quick/Core/QuickSpec.m

@@ -28,7 +28,8 @@ @implementation QuickSpec
  */
 + (void)initialize {
     [World setCurrentExampleGroup:[World rootExampleGroupForSpecClass:[self class]]];
-    [self exampleGroups];
+    QuickSpec *spec = [self new];
+    [spec exampleGroups];
 }
 
 /**
@@ -76,7 +77,7 @@ - (NSString *)name {
 
 #pragma mark - Public Interface
 
-+ (void)exampleGroups { }
+- (void)exampleGroups { }
 
 #pragma mark - Internal Methods
 

QuickTests/FunctionalTests+ObjC.m

@@ -12,7 +12,7 @@
 
 qck_describe(@"a describe block", ^{
     qck_it(@"contains an it block", ^{
-        // ...
+        XCTAssertTrue(true, @"expected to be true");
     });
 });
 

QuickTests/FunctionalTests.swift

@@ -9,7 +9,7 @@
 import Quick
 
 class PersonSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Person") {
             var person: Person?
             beforeEach { person = Person() }
@@ -54,7 +54,7 @@ class PersonSpec: QuickSpec {
 }
 
 class PoetSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Poet") {
             // FIXME: Radar worthy? `var poet: Poet?` results in build error:
             //        "Could not find member 'greeting'"

QuickTests/Matchers/BeNilSpec.swift

@@ -9,7 +9,7 @@
 import Quick
 
 class BeNilSpec : QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("BeNil") {
             var matcher: BeNil!
             beforeEach { matcher = BeNil() }

QuickTests/Matchers/BeTrueSpec.swift

@@ -9,7 +9,7 @@
 import Quick
 
 class BeTrueSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("BeTrue") {
             var matcher: BeTrue?
             beforeEach { matcher = BeTrue() }

QuickTests/Matchers/ContainSpec.swift

@@ -9,7 +9,7 @@
 import Quick
 
 class ContainSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Contain") {
             var matcher: Contain?
             var subject: String[]?

QuickTests/Matchers/EqualSpec.swift

@@ -9,7 +9,7 @@
 import Quick
 
 class EqualSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Equal") {
             var matcher: Equal?
             beforeEach { matcher = Equal("Sandor Clegane") }

README.md

@@ -12,7 +12,7 @@ and [Ginkgo](https://github.com/onsi/ginkgo).
 import Quick
 
 class PersonSpec: QuickSpec {
-    override class func exampleGroups() {
+    override func exampleGroups() {
         describe("Person") {
             var person: Person?
             beforeEach { person = Person() }