static NSString *const SampleDefaultsKey = @"sampleShortcut";

@interface MASShortcutBinderTests : XCTestCase
@property(strong) MASShortcutBinder *binder;
@property(strong) MASShortcutMonitor *monitor;
@property(strong) NSUserDefaults *defaults;
@end

@implementation MASShortcutBinderTests

- (void) setUp
{
    [super setUp];
    [self setBinder:[[MASShortcutBinder alloc] init]];
    [self setMonitor:[_binder shortcutMonitor]];
    [self setDefaults:[[NSUserDefaults alloc] init]];
    [_defaults removeObjectForKey:SampleDefaultsKey];
}

- (void) tearDown
{
    [_monitor unregisterAllShortcuts];
    [self setMonitor:nil];
    [self setDefaults:nil];
    [self setBinder:nil];
    [super tearDown];
}

- (void) testInitialValueReading
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:1 modifierFlags:1];
    [_defaults setObject:[NSKeyedArchiver archivedDataWithRootObject:shortcut] forKey:SampleDefaultsKey];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    XCTAssertTrue([_monitor isShortcutRegistered:shortcut],
        @"Pass the initial shortcut from defaults to shortcut monitor.");
}

- (void) testValueChangeReading
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:1 modifierFlags:1];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    [_defaults setObject:[NSKeyedArchiver archivedDataWithRootObject:shortcut] forKey:SampleDefaultsKey];
    XCTAssertTrue([_monitor isShortcutRegistered:shortcut],
        @"Pass the shortcut from defaults to shortcut monitor after defaults change.");
}

- (void) testValueClearing
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:1 modifierFlags:1];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    [_defaults setObject:[NSKeyedArchiver archivedDataWithRootObject:shortcut] forKey:SampleDefaultsKey];
    [_defaults removeObjectForKey:SampleDefaultsKey];
    XCTAssertFalse([_monitor isShortcutRegistered:shortcut],
        @"Unregister shortcut from monitor after value is cleared from defaults.");
}

- (void) testBindingRemoval
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:1 modifierFlags:1];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    [_defaults setObject:[NSKeyedArchiver archivedDataWithRootObject:shortcut] forKey:SampleDefaultsKey];
    [_binder breakBindingWithDefaultsKey:SampleDefaultsKey];
    XCTAssertFalse([_monitor isShortcutRegistered:shortcut],
        @"Unregister shortcut from monitor after binding was removed.");
}

- (void) testRebinding
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:1 modifierFlags:1];
    [_defaults setObject:[NSKeyedArchiver archivedDataWithRootObject:shortcut] forKey:SampleDefaultsKey];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    [_binder breakBindingWithDefaultsKey:SampleDefaultsKey];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    XCTAssertTrue([_monitor isShortcutRegistered:shortcut],
        @"Bind after unbinding.");
}

- (void) testTransformerDeserialization
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:5 modifierFlags:1048576];
    NSDictionary *storedShortcut = @{@"keyCode": @5, @"modifierFlags": @1048576};
    [_defaults setObject:storedShortcut forKey:SampleDefaultsKey];
    [_binder setBindingOptions:@{NSValueTransformerBindingOption:[MASDictionaryTransformer new]}];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    XCTAssertTrue([_monitor isShortcutRegistered:shortcut],
        @"Deserialize shortcut from user defaults using a custom transformer.");
}

- (void) testDefaultShortcuts
{
    MASShortcut *shortcut = [MASShortcut shortcutWithKeyCode:5 modifierFlags:1048576];
    [_binder registerDefaultShortcuts:@{SampleDefaultsKey: shortcut}];
    [_binder bindShortcutWithDefaultsKey:SampleDefaultsKey toAction:^{}];
    XCTAssertTrue([_monitor isShortcutRegistered:shortcut],
        @"Bind shortcut using a default value.");
}

// See issue #64 <http://git.io/x5YS> for rationale and discussion.
- (void) testIllegalSymbolsInBindingNames
{
    XCTAssertThrows([_binder bindShortcutWithDefaultsKey:@"foo.bar" toAction:^{}],
        @"Throw for illegal binding symbols: a dot (“.”).");
    XCTAssertThrows([_binder bindShortcutWithDefaultsKey:@"foo bar" toAction:^{}],
        @"Throw for illegal binding symbols: a space (“ ”).");
}

@end