Created initial test for CPSegmentedControl

Tests/AppKit/CPSegmentedControlTest.j

@@ -0,0 +1,33 @@
+@import <AppKit/AppKit.j>
+
+// TODO: Maybe create one test file for each tracking mode so they can be tested separately without confusion.
+@implementation CPSegmentedControlTest : OJTestCase
+{
+    CPSegmentedControlTest _segmentedControl;
+}
+
+- (void)setUp
+{
+    _segmentedControl = [[CPSegmentedControl alloc] initWithFrame:CGRectMakeZero()];
+    [_segmentedControl setSegmentCount:3];
+}
+
+- (void)testMakeCPSegmentedControlInstance
+{
+    [self assertNotNull:_segmentedControl];
+}
+
+- (void)testDefaultsToSelectOneTrackingMode
+{
+    [self assert:[_segmentedControl trackingMode] equals:CPSegmentSwitchTrackingSelectOne];
+}
+
+- (void)testSelectsOneSegmentStartingAtBlankState
+{
+    [self assert:[_segmentedControl selectedSegment] equals:-1];
+    [_segmentedControl setSelectedSegment:1];
+    [self assert:[_segmentedControl selectedSegment] equals:1];
+}
+
+@end
+