react-native/Examples/UIExplorer/UIExplorerUnitTests/RCTEventDispatcherTests.m

148 lines
4.1 KiB
Objective-C

/**
* The examples provided by Facebook are for non-commercial testing and
* evaluation purposes only.
*
* Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#import <UIKit/UIKit.h>
#import <XCTest/XCTest.h>
#import <OCMock/OCMock.h>
#import "RCTEventDispatcher.h"
@interface RCTTestEvent : RCTBaseEvent
@property (nonatomic, assign) BOOL canCoalesce;
@end
@implementation RCTTestEvent
- (instancetype)initWithViewTag:(NSNumber *)viewTag eventName:(NSString *)eventName body:(NSDictionary *)body
{
if (self = [super initWithViewTag:viewTag eventName:eventName body:body]) {
self.canCoalesce = YES;
}
return self;
}
+ (NSString *)moduleDotMethod
{
return @"RCTDeviceEventEmitter.emit";
}
@end
@interface RCTEventDispatcherTests : XCTestCase
@end
@implementation RCTEventDispatcherTests
{
id _bridge;
RCTEventDispatcher *_eventDispatcher;
NSString *_eventName;
NSDictionary *_body;
RCTTestEvent *_testEvent;
NSString *_JSMethod;
}
- (void)setUp
{
[super setUp];
_bridge = [OCMockObject mockForClass:[RCTBridge class]];
_eventDispatcher = [RCTEventDispatcher new];
((id<RCTBridgeModule>)_eventDispatcher).bridge = _bridge;
_eventName = RCTNormalizeInputEventName(@"sampleEvent");
_body = @{ @"foo": @"bar" };
_testEvent = [[RCTTestEvent alloc] initWithViewTag:nil
eventName:_eventName
body:_body];
_JSMethod = [[_testEvent class] moduleDotMethod];
}
- (void)testLegacyEventsAreImmediatelyDispatched
{
[[_bridge expect] enqueueJSCall:_JSMethod
args:@[_eventName, _body]];
[_eventDispatcher sendDeviceEventWithName:_eventName body:_body];
[_bridge verify];
}
- (void)testNonCoalescingEventsAreImmediatelyDispatched
{
_testEvent.canCoalesce = NO;
[[_bridge expect] enqueueJSCall:_JSMethod
args:@[_eventName, _body]];
[_eventDispatcher sendEvent:_testEvent];
[_bridge verify];
}
- (void)testCoalescedEventShouldBeDispatchedOnFrameUpdate
{
[_eventDispatcher sendEvent:_testEvent];
[[_bridge expect] enqueueJSCall:@"RCTDeviceEventEmitter.emit"
args:@[_eventName, _body]];
[(id<RCTFrameUpdateObserver>)_eventDispatcher didUpdateFrame:nil];
[_bridge verify];
}
- (void)testBasicCoalescingReturnsLastEvent
{
RCTTestEvent *ignoredEvent = [[RCTTestEvent alloc] initWithViewTag:nil
eventName:_eventName
body:@{ @"other": @"body" }];
[_eventDispatcher sendEvent:ignoredEvent];
[_eventDispatcher sendEvent:_testEvent];
[[_bridge expect] enqueueJSCall:@"RCTDeviceEventEmitter.emit"
args:@[_eventName, _body]];
[(id<RCTFrameUpdateObserver>)_eventDispatcher didUpdateFrame:nil];
[_bridge verify];
}
- (void)testDifferentEventTypesDontCoalesce
{
NSString *firstEventName = RCTNormalizeInputEventName(@"firstEvent");
RCTTestEvent *firstEvent = [[RCTTestEvent alloc] initWithViewTag:nil
eventName:firstEventName
body:_body];
[_eventDispatcher sendEvent:firstEvent];
[_eventDispatcher sendEvent:_testEvent];
[[_bridge expect] enqueueJSCall:@"RCTDeviceEventEmitter.emit"
args:@[firstEventName, _body]];
[[_bridge expect] enqueueJSCall:@"RCTDeviceEventEmitter.emit"
args:@[_eventName, _body]];
[(id<RCTFrameUpdateObserver>)_eventDispatcher didUpdateFrame:nil];
[_bridge verify];
}
@end