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RACSubscribableSpec.m
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RACSubscribableSpec.m
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//
// RACSubscribableSpc.m
// ReactiveCocoa
//
// Created by Josh Abernathy on 3/2/12.
// Copyright (c) 2012 GitHub, Inc. All rights reserved.
//
#import "RACSpecs.h"
#import "RACSubscribable.h"
#import "RACSubscribable+Operations.h"
#import "RACSubscriber.h"
#import "RACSubject.h"
#import "RACBehaviorSubject.h"
#import "RACDisposable.h"
#import "RACUnit.h"
#import "RACTuple.h"
SpecBegin(RACSubscribable)
describe(@"subscribing", ^{
__block RACSubscribable *subscribable = nil;
id nextValueSent = @"1";
beforeEach(^{
subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:nextValueSent];
[subscriber sendCompleted];
return nil;
}];
});
it(@"should get next values", ^{
__block id nextValueReceived = nil;
[subscribable subscribeNext:^(id x) {
nextValueReceived = x;
} error:^(NSError *error) {
} completed:^{
}];
expect(nextValueReceived).to.equal(nextValueSent);
});
it(@"should get completed", ^{
__block BOOL didGetCompleted = NO;
[subscribable subscribeNext:^(id x) {
} error:^(NSError *error) {
} completed:^{
didGetCompleted = YES;
}];
expect(didGetCompleted).to.beTruthy();
});
it(@"should not get an error", ^{
__block BOOL didGetError = NO;
[subscribable subscribeNext:^(id x) {
} error:^(NSError *error) {
didGetError = YES;
} completed:^{
}];
expect(didGetError).to.beFalsy();
});
it(@"shouldn't get anything after dispose", ^{
__block BOOL shouldBeGettingItems = YES;
RACSubject *subject = [RACSubject subject];
RACDisposable *disposable = [subject subscribeNext:^(id x) {
expect(shouldBeGettingItems).to.beTruthy();
}];
shouldBeGettingItems = YES;
[subject sendNext:@"test 1"];
[subject sendNext:@"test 2"];
[disposable dispose];
shouldBeGettingItems = NO;
[subject sendNext:@"test 3"];
});
it(@"should support -takeUntil:", ^{
__block BOOL shouldBeGettingItems = YES;
RACSubject *subject = [RACSubject subject];
RACSubject *cutOffSubject = [RACSubject subject];
[[subject takeUntil:cutOffSubject] subscribeNext:^(id x) {
expect(shouldBeGettingItems).to.beTruthy();
}];
shouldBeGettingItems = YES;
[subject sendNext:@"test 1"];
[subject sendNext:@"test 2"];
[cutOffSubject sendNext:[RACUnit defaultUnit]];
shouldBeGettingItems = NO;
[subject sendNext:@"test 3"];
});
});
describe(@"querying", ^{
__block RACSubscribable *subscribable = nil;
id nextValueSent = @"1";
beforeEach(^{
subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:nextValueSent];
[subscriber sendNext:@"other value"];
[subscriber sendCompleted];
return nil;
}];
});
it(@"should support where", ^{
__block BOOL didGetCallbacks = NO;
[[subscribable where:^BOOL(id x) {
return x == nextValueSent;
}] subscribeNext:^(id x) {
expect(x).to.equal(nextValueSent);
didGetCallbacks = YES;
} error:^(NSError *error) {
} completed:^{
}];
expect(didGetCallbacks).to.beTruthy();
});
it(@"should support select", ^{
__block BOOL didGetCallbacks = NO;
id transformedValue = @"other";
[[subscribable select:^(id x) {
return transformedValue;
}] subscribeNext:^(id x) {
expect(x).to.equal(transformedValue);
didGetCallbacks = YES;
} error:^(NSError *error) {
} completed:^{
}];
expect(didGetCallbacks).to.beTruthy();
});
it(@"should support window", ^{
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@"1"];
[subscriber sendNext:@"2"];
[subscriber sendNext:@"3"];
[subscriber sendNext:@"4"];
[subscriber sendNext:@"5"];
[subscriber sendCompleted];
return nil;
}];
RACBehaviorSubject *windowOpen = [RACBehaviorSubject behaviorSubjectWithDefaultValue:@""];
RACSubject *closeSubject = [RACSubject subject];
__block NSUInteger valuesReceived = 0;
RACSubscribable *window = [subscribable windowWithStart:windowOpen close:^(id<RACSubscribable> start) {
return closeSubject;
}];
[window subscribeNext:^(id x) {
[x subscribeNext:^(id x) {
valuesReceived++;
NSLog(@"got: %@", x);
if(valuesReceived % 2 == 0) {
[closeSubject sendNext:x];
[windowOpen sendNext:@""];
}
} error:^(NSError *error) {
} completed:^{
}];
} error:^(NSError *error) {
} completed:^{
NSLog(@"completed");
}];
});
it(@"should support take", ^{
@autoreleasepool {
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@"1"];
[subscriber sendNext:@"2"];
[subscriber sendNext:@"3"];
[subscriber sendNext:@"4"];
[subscriber sendNext:@"5"];
[subscriber sendCompleted];
return nil;
}];
RACSubscriber *ob = [RACSubscriber subscriberWithNext:NULL error:NULL completed:NULL];
@autoreleasepool {
[subscribable subscribe:ob];
}
NSLog(@"d");
}
});
it(@"should return first 'next' value with -firstOrDefault:success:error:", ^{
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^ id (id<RACSubscriber> subscriber) {
[subscriber sendNext:@1];
[subscriber sendNext:@2];
[subscriber sendNext:@3];
[subscriber sendCompleted];
return nil;
}];
expect(subscribable).notTo.beNil();
__block BOOL success = NO;
__block NSError *error = nil;
expect([subscribable firstOrDefault:@5 success:&success error:&error]).to.equal(@1);
expect(success).to.beTruthy();
expect(error).to.beNil();
});
it(@"should return first default value with -firstOrDefault:success:error:", ^{
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^ id (id<RACSubscriber> subscriber) {
[subscriber sendCompleted];
return nil;
}];
expect(subscribable).notTo.beNil();
__block BOOL success = NO;
__block NSError *error = nil;
expect([subscribable firstOrDefault:@5 success:&success error:&error]).to.equal(@5);
expect(success).to.beTruthy();
expect(error).to.beNil();
});
it(@"should return error with -firstOrDefault:success:error:", ^{
NSError *testError = [NSError errorWithDomain:@"foo" code:100 userInfo:nil];
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^ id (id<RACSubscriber> subscriber) {
[subscriber sendError:testError];
return nil;
}];
expect(subscribable).notTo.beNil();
__block BOOL success = NO;
__block NSError *error = nil;
expect([subscribable firstOrDefault:@5 success:&success error:&error]).to.equal(@5);
expect(success).to.beFalsy();
expect(error).to.equal(testError);
});
});
describe(@"continuation", ^{
it(@"shouldn't receive deferred errors", ^{
__block NSUInteger numberOfSubscriptions = 0;
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
if(numberOfSubscriptions > 2) {
[subscriber sendCompleted];
return nil;
}
numberOfSubscriptions++;
[subscriber sendNext:@"1"];
[subscriber sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
[subscriber sendCompleted];
return nil;
}];
__block BOOL gotNext = NO;
__block BOOL gotError = NO;
[[subscribable asMaybes] subscribeNext:^(id x) {
gotNext = YES;
} error:^(NSError *error) {
gotError = YES;
} completed:^{
}];
expect(gotNext).to.beTruthy();
expect(gotError).to.beFalsy();
});
it(@"should repeat after completion", ^{
__block NSUInteger numberOfSubscriptions = 0;
RACSubscribable *subscribable = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
if(numberOfSubscriptions > 2) {
[subscriber sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
return nil;
}
numberOfSubscriptions++;
[subscriber sendNext:@"1"];
[subscriber sendCompleted];
[subscriber sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
return nil;
}];
__block NSUInteger nextCount = 0;
__block BOOL gotCompleted = NO;
[[subscribable repeat] subscribeNext:^(id x) {
nextCount++;
} error:^(NSError *error) {
} completed:^{
gotCompleted = YES;
}];
expect(nextCount).to.beGreaterThan(1);
expect(gotCompleted).to.beFalsy();
});
});
describe(@"combineLatest", ^{
__block id<RACSubscriber> subscriber1 = nil, subscriber2 = nil;
__block RACSubscribable *subscribable1 = nil, *subscribable2 = nil, *combined = nil;
beforeEach(^{
subscribable1 = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
subscriber1 = subscriber;
return nil;
}],
subscribable2 = [RACSubscribable createSubscribable:^RACDisposable *(id<RACSubscriber> subscriber) {
subscriber2 = subscriber;
return nil;
}],
combined = [RACSubscribable combineLatest:@[ subscribable1, subscribable2 ]];
});
it(@"should yield when all sources yield", ^{
__block id result;
[combined subscribeNext:^(id x) {
result = x;
}];
[subscriber1 sendNext:@"1"];
[subscriber2 sendNext:@"2"];
expect(result).to.beKindOf([RACTuple class]);
RACTuple *tuple = (RACTuple *)result;
expect(tuple.first).to.equal(@"1");
expect(tuple.second).to.equal(@"2");
});
it(@"should not yield when some sources have not yielded", ^{
__block id result;
[combined subscribeNext:^(id x) {
result = x;
}];
[subscriber1 sendNext:@"1"];
expect(result).to.beNil();
});
it(@"should yield multiple times when all sources yield multiple times", ^{
__block int yieldCount = 0;
__block id result1, result2;
[combined subscribeNext:^(id x) {
yieldCount++;
if (yieldCount == 1)
result1 = x;
if (yieldCount == 2)
result2 = x;
}];
[subscriber1 sendNext:@"1"];
[subscriber2 sendNext:@"2"];
[subscriber1 sendNext:@"3"];
[subscriber2 sendNext:@"4"];
expect(result1).to.beKindOf([RACTuple class]);
RACTuple *tuple1 = (RACTuple *)result1;
expect(tuple1.first).to.equal(@"1");
expect(tuple1.second).to.equal(@"2");
expect(result2).to.beKindOf([RACTuple class]);
RACTuple *tuple2 = (RACTuple *)result2;
expect(tuple2.first).to.equal(@"3");
expect(tuple2.second).to.equal(@"4");
});
it(@"should not yield multiple times when all sources do not yield multiple times", ^{
__block int yieldCount = 0;
__block id result1, result2;
[combined subscribeNext:^(id x) {
yieldCount++;
if (yieldCount == 1)
result1 = x;
if (yieldCount == 2)
result2 = x;
}];
[subscriber1 sendNext:@"1"];
[subscriber2 sendNext:@"2"];
[subscriber1 sendNext:@"3"];
expect(result1).to.beKindOf([RACTuple class]);
RACTuple *tuple1 = (RACTuple *)result1;
expect(tuple1.first).to.equal(@"1");
expect(tuple1.second).to.equal(@"2");
expect(result2).to.beNil();
});
it(@"should complete when all sources complete", ^{
__block BOOL completed = NO;
[combined subscribeCompleted:^{
completed = YES;
}];
[subscriber1 sendCompleted];
[subscriber2 sendCompleted];
expect(completed).to.beTruthy();
});
it(@"should not complete when some sources are not complete", ^{
__block BOOL completed = NO;
[combined subscribeCompleted:^{
completed = YES;
}];
[subscriber1 sendCompleted];
expect(completed).to.beFalsy();
});
it(@"should error when a source errors", ^{
__block BOOL gotError = NO;
[combined subscribeError:^(NSError *error) {
gotError = YES;
}];
[subscriber1 sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
expect(gotError).to.beTruthy();
});
it(@"should error multiple times when multiple sources error", ^{
__block int errorCount = 0;
[combined subscribeError:^(NSError *error) {
errorCount++;
}];
[subscriber1 sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
[subscriber2 sendError:[NSError errorWithDomain:@"" code:-1 userInfo:nil]];
expect(errorCount).to.equal(2);
});
});
SpecEnd