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/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "Firestore/Source/Util/FSTDispatchQueue.h"
#import <XCTest/XCTest.h>
#import "Firestore/Example/Tests/Util/XCTestCase+Await.h"
// In these generic tests the specific TimerIDs don't matter.
static const FSTTimerID timerID1 = FSTTimerIDListenStreamConnectionBackoff;
static const FSTTimerID timerID2 = FSTTimerIDListenStreamIdle;
static const FSTTimerID timerID3 = FSTTimerIDWriteStreamConnectionBackoff;
@interface FSTDispatchQueueTests : XCTestCase
@end
@implementation FSTDispatchQueueTests {
FSTDispatchQueue *_queue;
NSMutableArray *_completedSteps;
NSArray *_expectedSteps;
XCTestExpectation *_expectation;
}
- (void)setUp {
[super setUp];
dispatch_queue_t dispatch_queue =
dispatch_queue_create("FSTDispatchQueueTests", DISPATCH_QUEUE_SERIAL);
_queue = [[FSTDispatchQueue alloc] initWithQueue:dispatch_queue];
_completedSteps = [NSMutableArray array];
_expectedSteps = nil;
}
/**
* Helper to return a block that adds @(n) to _completedSteps when run and fulfils _expectation if
* the _completedSteps match the _expectedSteps.
*/
- (void (^)())blockForStep:(int)n {
return ^void() {
[self->_completedSteps addObject:@(n)];
if (self->_expectedSteps && self->_completedSteps.count >= self->_expectedSteps.count) {
XCTAssertEqualObjects(self->_completedSteps, self->_expectedSteps);
[self->_expectation fulfill];
}
};
}
- (void)testCanScheduleCallbacksInTheFuture {
_expectation = [self expectationWithDescription:@"Expected steps"];
_expectedSteps = @[ @1, @2, @3, @4 ];
[_queue dispatchAsync:[self blockForStep:1]];
[_queue dispatchAfterDelay:0.005 timerID:timerID1 block:[self blockForStep:4]];
[_queue dispatchAfterDelay:0.001 timerID:timerID2 block:[self blockForStep:3]];
[_queue dispatchAsync:[self blockForStep:2]];
[self awaitExpectations];
}
- (void)testCanCancelDelayedCallbacks {
_expectation = [self expectationWithDescription:@"Expected steps"];
_expectedSteps = @[ @1, @3 ];
// Queue everything from the queue to ensure nothing completes before we cancel.
[_queue dispatchAsync:^{
[_queue dispatchAsyncAllowingSameQueue:[self blockForStep:1]];
FSTDelayedCallback *step2Timer =
[_queue dispatchAfterDelay:.001 timerID:timerID1 block:[self blockForStep:2]];
[_queue dispatchAfterDelay:.005 timerID:timerID2 block:[self blockForStep:3]];
XCTAssertTrue([_queue containsDelayedCallbackWithTimerID:timerID1]);
[step2Timer cancel];
XCTAssertFalse([_queue containsDelayedCallbackWithTimerID:timerID1]);
}];
[self awaitExpectations];
}
- (void)testCanManuallyDrainAllDelayedCallbacksForTesting {
[_queue dispatchAsync:[self blockForStep:1]];
[_queue dispatchAfterDelay:20 timerID:timerID1 block:[self blockForStep:4]];
[_queue dispatchAfterDelay:10 timerID:timerID2 block:[self blockForStep:3]];
[_queue dispatchAsync:[self blockForStep:2]];
[_queue runDelayedCallbacksUntil:FSTTimerIDAll];
XCTAssertEqualObjects(_completedSteps, (@[ @1, @2, @3, @4 ]));
}
- (void)testCanManuallyDrainSpecificDelayedCallbacksForTesting {
[_queue dispatchAsync:[self blockForStep:1]];
[_queue dispatchAfterDelay:20 timerID:timerID1 block:[self blockForStep:5]];
[_queue dispatchAfterDelay:10 timerID:timerID2 block:[self blockForStep:3]];
[_queue dispatchAfterDelay:15 timerID:timerID3 block:[self blockForStep:4]];
[_queue dispatchAsync:[self blockForStep:2]];
[_queue runDelayedCallbacksUntil:timerID3];
XCTAssertEqualObjects(_completedSteps, (@[ @1, @2, @3, @4 ]));
}
@end
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