137 lines
4.5 KiB
Objective-C
137 lines
4.5 KiB
Objective-C
#import <XCTest/XCTest.h>
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#import "ObservableValue.h"
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#import "TestUtil.h"
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#import "CancelTokenSource.h"
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@interface ObservableTest : XCTestCase
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@end
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@implementation ObservableTest
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-(void) testObservableAddRemove {
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ObservableValueController* s = [ObservableValueController observableValueControllerWithInitialValue:@""];
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ObservableValue* t = s;
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NSMutableArray* a = [NSMutableArray array];
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CancelTokenSource* c = [CancelTokenSource cancelTokenSource];
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[t watchLatestValueOnArbitraryThread:^(id value) {[a addObject:value];}
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untilCancelled:[c getToken]];
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test([a isEqualToArray:@[@""]]);
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[s updateValue:@5];
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test([a isEqualToArray:(@[@"", @5])]);
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[s updateValue:@7];
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test([a isEqualToArray:(@[@"", @5, @7])]);
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[c cancel];
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[s updateValue:@11];
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test([a isEqualToArray:(@[@"", @5, @7])]);
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}
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-(void) testObservableAddAdd {
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ObservableValueController* s = [ObservableValueController observableValueControllerWithInitialValue:@""];
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ObservableValue* t = s;
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NSMutableArray* a = [NSMutableArray array];
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CancelTokenSource* c = [CancelTokenSource cancelTokenSource];
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[t watchLatestValueOnArbitraryThread:^(id value) {[a addObject:value];}
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untilCancelled:[c getToken]];
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[t watchLatestValueOnArbitraryThread:^(id value) {[a addObject:value];}
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untilCancelled:[c getToken]];
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[t watchLatestValueOnArbitraryThread:^(id value) {[a addObject:value];}
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untilCancelled:[c getToken]];
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test([a isEqualToArray:(@[@"", @"", @""])]);
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[s updateValue:@5];
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test([a isEqualToArray:(@[@"", @"", @"", @5, @5, @5])]);
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}
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-(void) testObservableRedundantSetIgnored {
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id v1 = @"";
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id v2 = nil;
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id v3 = @1;
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ObservableValueController* s = [ObservableValueController observableValueControllerWithInitialValue:v1];
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ObservableValue* t = s;
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__block id latest = nil;
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__block int count = 0;
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[t watchLatestValueOnArbitraryThread:^(id value) {latest = value;count++;}
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untilCancelled:nil];
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test(latest == v1);
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test(count == 1);
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[s updateValue:v1];
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test(latest == v1);
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test(count == 1);
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[s updateValue:v2];
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test(latest == v2);
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test(count == 2);
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[s updateValue:v2];
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test(latest == v2);
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test(count == 2);
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[s updateValue:v1];
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test(latest == v1);
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test(count == 3);
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[s updateValue:v3];
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test(latest == v3);
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test(count == 4);
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}
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-(void) testObservableReentrantAdd {
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ObservableValueController* s = [ObservableValueController observableValueControllerWithInitialValue:@""];
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ObservableValue* t = s;
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NSMutableArray* a = [NSMutableArray array];
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CancelTokenSource* c = [CancelTokenSource cancelTokenSource];
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__block void(^registerSelf)() = nil;
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void(^registerSelf_builder)() = ^{
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__block bool first = true;
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[t watchLatestValueOnArbitraryThread:^(id value) {
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if (!first) registerSelf();
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first = false;
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[a addObject:value];
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} untilCancelled:[c getToken]];
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};
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registerSelf = [registerSelf_builder copy];
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registerSelf();
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// adding during a callback counts as adding after the callback
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// so we should see a doubling each time
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test([a isEqualToArray:@[@""]]);
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[s updateValue:@1];
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test([a isEqualToArray:(@[@"", @1, @1])]);
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[s updateValue:@2];
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test([a isEqualToArray:(@[@"", @1, @1, @2, @2, @2, @2])]);
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[s updateValue:@3];
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test([a isEqualToArray:(@[@"", @1, @1, @2, @2, @2, @2, @3, @3, @3, @3, @3, @3, @3, @3])]);
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}
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-(void) testObservableReentrantRemove {
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ObservableValueController* s = [ObservableValueController observableValueControllerWithInitialValue:@""];
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ObservableValue* t = s;
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NSMutableArray* a = [NSMutableArray array];
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CancelTokenSource* c = [CancelTokenSource cancelTokenSource];
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for (int i = 0; i < 3; i++) {
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__block bool first = true;
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[t watchLatestValueOnArbitraryThread:^(id value) {
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if (!first) {
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[c cancel];
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[a addObject:value];
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}
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first = false;
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} untilCancelled:[c getToken]];
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}
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// removing during a callback counts as removing after the callback
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// so we should see all the callbacks run, then they're all cancelled
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test([a isEqualToArray:(@[])]);
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[s updateValue:@1];
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test([a isEqualToArray:(@[@1, @1, @1])]);
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[s updateValue:@2];
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test([a isEqualToArray:(@[@1, @1, @1])]);
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}
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@end
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