Add an XCTestCase class, renaming the protocol to XCTestCaseType

Author: briancroom

Sources/XCTest/XCTestCase.swift

@@ -11,13 +11,21 @@
 //  Base protocol (and extension with default methods) for test cases
 //
 
-public protocol XCTestCase : XCTestCaseProvider {
-    func setUp()
-    func tearDown()
-}
+public class XCTestCase {
+
+    public init() {
+    }
+
+    public func setUp() {
+    }
+
+    public func tearDown() {
+    }
+
+    public var allTests : [(String, () throws -> Void)] {
+        return [("missingTests", throwMissingAllTestsOverride)]
+    }
 
-extension XCTestCase {
-    
     public var continueAfterFailure: Bool {
         get {
             return true
@@ -26,7 +34,30 @@ extension XCTestCase {
             // TODO: When using the Objective-C runtime, XCTest is able to throw an exception from an assert and then catch it at the frame above the test method. This enables the framework to effectively stop all execution in the current test. There is no such facility in Swift. Until we figure out how to get a compatible behavior, we have decided to hard-code the value of 'true' for continue after failure.
         }
     }
-    
+}
+
+// MARK: Error Reporting
+extension XCTestCase {
+
+    public enum Error: ErrorType, CustomStringConvertible {
+        case MissingAllTestsOverride
+
+        public var description: String {
+            switch self {
+            case .MissingAllTestsOverride:
+                return "XCTestCase subclasses must override the `allTests` property to list the individual tests they provide"
+            }
+        }
+    }
+
+    func throwMissingAllTestsOverride() throws {
+        throw Error.MissingAllTestsOverride
+    }
+}
+
+// MARK: Running Tests
+extension XCTestCase {
+
     public func invokeTest() {
         let tests = self.allTests
         var totalDuration = 0.0
@@ -90,12 +121,4 @@ extension XCTestCase {
 
         print("Executed \(tests.count) test\(testCountSuffix), with \(totalFailures) failure\(failureSuffix) (\(unexpectedFailures) unexpected) in \(printableStringForTimeInterval(totalDuration)) (\(printableStringForTimeInterval(overallDuration))) seconds")
     }
-    
-    public func setUp() {
-        
-    }
-    
-    public func tearDown() {
-        
-    }
 }