YapDatabase/Testing/UnitTesting/TestYapDatabase.m

1215 lines
46 KiB
Objective-C

#import <XCTest/XCTest.h>
#import <CocoaLumberjack/CocoaLumberjack.h>
#import <libkern/OSAtomic.h>
#import "TestObject.h"
#import "YapDatabase.h"
#import "YapProxyObject.h"
#import "YapProxyObjectPrivate.h"
@interface TestYapDatabase : XCTestCase
@end
@implementation TestYapDatabase
- (NSString *)randomLetters:(NSUInteger)length
{
NSString *alphabet = @"abcdefghijklmnopqrstuvwxyz";
NSUInteger alphabetLength = [alphabet length];
NSMutableString *result = [NSMutableString stringWithCapacity:length];
NSUInteger i;
for (i = 0; i < length; i++)
{
unichar c = [alphabet characterAtIndex:(NSUInteger)arc4random_uniform((uint32_t)alphabetLength)];
[result appendFormat:@"%C", c];
}
return result;
}
- (NSString *)databasePath:(NSString *)suffix
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *baseDir = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory();
NSString *databaseName = [NSString stringWithFormat:@"%@-%@.sqlite", THIS_FILE, suffix];
return [baseDir stringByAppendingPathComponent:databaseName];
}
- (void)setUp
{
[super setUp];
[DDLog removeAllLoggers];
[DDLog addLogger:[DDTTYLogger sharedInstance]];
}
- (void)tearDown
{
[DDLog flushLog];
[super tearDown];
}
- (void)test1
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
YapDatabaseConnection *connection1 = [database newConnection];
YapDatabaseConnection *connection2 = [database newConnection];
TestObject *testObject = [TestObject generateTestObject];
TestObjectMetadata *testMetadata = [testObject extractMetadata];
NSString *key1 = @"some-key-1";
NSString *key2 = @"some-key-2";
NSString *key3 = @"some-key-3";
NSString *key4 = @"some-key-4";
NSString *key5 = @"some-key-5";
__block id aObj;
__block id aMetadata;
__block BOOL result;
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertTrue([transaction numberOfCollections] == 0);
XCTAssertTrue([[transaction allCollections] count] == 0);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 0);
XCTAssertNil([transaction objectForKey:@"non-existant" inCollection:nil]);
XCTAssertNil([transaction serializedObjectForKey:@"non-existant" inCollection:nil]);
XCTAssertFalse([transaction hasObjectForKey:@"non-existant" inCollection:nil]);
result = [transaction getObject:&aObj metadata:&aMetadata forKey:@"non-existant" inCollection:nil];
XCTAssertFalse(result, @"Expected NO getObject for key");
XCTAssertNil(aObj, @"Expected object to be set to nil");
XCTAssertNil(aMetadata, @"Expected metadata to be set to nil");
XCTAssertNil([transaction metadataForKey:@"non-existant" inCollection:nil]);
XCTAssertNoThrow([transaction removeObjectForKey:@"non-existant" inCollection:nil]);
NSArray *keys = @[@"non",@"existant",@"keys"];
XCTAssertNoThrow([transaction removeObjectsForKeys:keys inCollection:nil]);
__block NSUInteger count = 0;
[transaction enumerateKeysAndMetadataInCollection:nil usingBlock:^(NSString *key, id metadata, BOOL *stop){
count++;
}];
XCTAssertTrue(count == 0);
[transaction enumerateKeysAndObjectsInCollection:nil
usingBlock:^(NSString *key, id object, BOOL *stop){
count++;
}];
XCTAssertTrue(count == 0);
// Attempt to set metadata for a key that has no associated object.
// It should silently fail (do nothing).
// And further queries to fetch metadata for the same key should return nil.
XCTAssertNoThrow([transaction replaceMetadata:testMetadata forKey:@"non-existant" inCollection:nil],
@"Expected nothing to happen");
XCTAssertNil([transaction metadataForKey:@"non-existant" inCollection:nil],
@"Expected nil metadata since no object");
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test object without metadata
[transaction setObject:testObject forKey:key1 inCollection:nil];
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 1);
XCTAssertTrue([[transaction allKeysInCollection:nil] count] == 1);
XCTAssertTrue([transaction numberOfKeysInCollection:@""] == 1);
XCTAssertTrue([[transaction allKeysInCollection:@""] count] == 1);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction serializedObjectForKey:key1 inCollection:nil]);
XCTAssertTrue([transaction hasObjectForKey:key1 inCollection:nil]);
result = [transaction getObject:&aObj metadata:&aMetadata forKey:key1 inCollection:nil];
XCTAssertTrue(result);
XCTAssertNotNil(aObj);
XCTAssertNil(aMetadata);
XCTAssertNil([transaction metadataForKey:key1 inCollection:nil]);
[transaction enumerateKeysAndMetadataInCollection:nil usingBlock:^(NSString *key, id metadata, BOOL *stop){
XCTAssertNil(metadata);
}];
[transaction enumerateKeysAndObjectsInCollection:nil
usingBlock:^(NSString *key, id object, BOOL *stop){
XCTAssertNotNil(aObj);
}];
[transaction enumerateRowsInCollection:nil
usingBlock:^(NSString *key, id object, id metadata, BOOL *stop){
XCTAssertNotNil(aObj);
XCTAssertNil(metadata);
}];
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test remove object
[transaction removeObjectForKey:key1 inCollection:nil];
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 0);
XCTAssertTrue([[transaction allKeysInCollection:nil] count] == 0);
XCTAssertNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNil([transaction serializedObjectForKey:key1 inCollection:nil]);
XCTAssertFalse([transaction hasObjectForKey:key1 inCollection:nil]);
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test object with metadata
[transaction setObject:testObject forKey:key1 inCollection:nil withMetadata:testMetadata];
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 1);
XCTAssertTrue([[transaction allKeysInCollection:nil] count] == 1);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction serializedObjectForKey:key1 inCollection:nil]);
XCTAssertTrue([transaction hasObjectForKey:key1 inCollection:nil]);
result = [transaction getObject:&aObj metadata:&aMetadata forKey:key1 inCollection:nil];
XCTAssertTrue(result);
XCTAssertNotNil(aObj);
XCTAssertNotNil(aMetadata);
XCTAssertNotNil([transaction metadataForKey:key1 inCollection:nil]);
[transaction enumerateKeysAndMetadataInCollection:nil usingBlock:^(NSString *key, id metadata, BOOL *stop){
XCTAssertNotNil(metadata);
}];
[transaction enumerateKeysAndObjectsInCollection:nil
usingBlock:^(NSString *key, id object, BOOL *stop){
XCTAssertNotNil(aObj);
}];
[transaction enumerateRowsInCollection:nil
usingBlock:^(NSString *key, id object, id metadata, BOOL *stop){
XCTAssertNotNil(aObj);
XCTAssertNotNil(metadata);
}];
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test multiple objects
[transaction setObject:testObject forKey:key1 inCollection:nil withMetadata:testMetadata];
[transaction setObject:testObject forKey:key2 inCollection:nil withMetadata:testMetadata];
[transaction setObject:testObject forKey:key3 inCollection:nil withMetadata:testMetadata];
[transaction setObject:testObject forKey:key4 inCollection:nil withMetadata:testMetadata];
[transaction setObject:testObject forKey:key5 inCollection:nil withMetadata:testMetadata];
[transaction setObject:testObject forKey:key1 inCollection:@"test" withMetadata:testMetadata];
[transaction setObject:testObject forKey:key2 inCollection:@"test" withMetadata:testMetadata];
[transaction setObject:testObject forKey:key3 inCollection:@"test" withMetadata:testMetadata];
[transaction setObject:testObject forKey:key4 inCollection:@"test" withMetadata:testMetadata];
[transaction setObject:testObject forKey:key5 inCollection:@"test" withMetadata:testMetadata];
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([[transaction allKeysInCollection:nil] count] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"test"] == 5);
XCTAssertTrue([[transaction allKeysInCollection:@"test"] count] == 5);
XCTAssertTrue([transaction numberOfKeysInAllCollections] == 10);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"test"]);
XCTAssertTrue([transaction hasObjectForKey:key1 inCollection:nil]);
XCTAssertTrue([transaction hasObjectForKey:key1 inCollection:@"test"]);
XCTAssertNotNil([transaction metadataForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction metadataForKey:key1 inCollection:@"test"]);
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test remove multiple objects
[transaction removeObjectsForKeys:@[ key1, key2, key3 ] inCollection:nil];
[transaction removeObjectsForKeys:@[ key1, key2, key3 ] inCollection:@"test"];
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 2);
XCTAssertTrue([[transaction allKeysInCollection:nil] count] == 2);
XCTAssertTrue([transaction numberOfKeysInCollection:@"test"] == 2);
XCTAssertTrue([[transaction allKeysInCollection:@"test"] count] == 2);
XCTAssertTrue([transaction numberOfKeysInAllCollections] == 4);
XCTAssertNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNil([transaction objectForKey:key1 inCollection:@"test"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"test"]);
XCTAssertFalse([transaction hasObjectForKey:key1 inCollection:nil]);
XCTAssertFalse([transaction hasObjectForKey:key1 inCollection:@"test"]);
XCTAssertTrue([transaction hasObjectForKey:key5 inCollection:nil]);
XCTAssertTrue([transaction hasObjectForKey:key5 inCollection:@"test"]);
XCTAssertNil([transaction metadataForKey:key1 inCollection:nil]);
XCTAssertNil([transaction metadataForKey:key1 inCollection:@"test"]);
XCTAssertNotNil([transaction metadataForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction metadataForKey:key5 inCollection:@"test"]);
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test remove all objects
[transaction removeAllObjectsInAllCollections];
XCTAssertNil([transaction objectForKey:key1 inCollection:nil],);
XCTAssertNil([transaction objectForKey:key1 inCollection:@"test"]);
XCTAssertFalse([transaction hasObjectForKey:key1 inCollection:nil]);
XCTAssertFalse([transaction hasObjectForKey:key1 inCollection:@"test"]);
XCTAssertNil([transaction metadataForKey:key1 inCollection:nil]);
XCTAssertNil([transaction metadataForKey:key1 inCollection:@"test"]);
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test add objects to a particular collection
[transaction setObject:testObject forKey:key1 inCollection:nil];
[transaction setObject:testObject forKey:key2 inCollection:nil];
[transaction setObject:testObject forKey:key3 inCollection:nil];
[transaction setObject:testObject forKey:key4 inCollection:nil];
[transaction setObject:testObject forKey:key5 inCollection:nil];
[transaction setObject:testObject forKey:key1 inCollection:@"collection1"];
[transaction setObject:testObject forKey:key2 inCollection:@"collection1"];
[transaction setObject:testObject forKey:key3 inCollection:@"collection1"];
[transaction setObject:testObject forKey:key4 inCollection:@"collection1"];
[transaction setObject:testObject forKey:key5 inCollection:@"collection1"];
[transaction setObject:testObject forKey:key1 inCollection:@"collection2"];
[transaction setObject:testObject forKey:key2 inCollection:@"collection2"];
[transaction setObject:testObject forKey:key3 inCollection:@"collection2"];
[transaction setObject:testObject forKey:key4 inCollection:@"collection2"];
[transaction setObject:testObject forKey:key5 inCollection:@"collection2"];
XCTAssertTrue([transaction numberOfCollections] == 3,
@"Incorrect number of collections. Got=%d, Expected=3", (int)[transaction numberOfCollections]);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection1"] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection2"] == 5);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"collection2"]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:@"collection2"]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:@"collection2"]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:@"collection2"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"collection2"]);
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
// Test remove all objects from collection
XCTAssertTrue([transaction numberOfCollections] == 3);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection1"] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection2"] == 5);
[transaction removeAllObjectsInCollection:@"collection2"];
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertTrue([transaction numberOfCollections] == 2);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection1"] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection2"] == 0);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"collection1"]);
XCTAssertNil([transaction objectForKey:key1 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key2 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key3 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key4 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key5 inCollection:@"collection2"]);
}];
[connection1 flushMemoryWithFlags:YapDatabaseConnectionFlushMemoryFlags_All];
[connection2 flushMemoryWithFlags:YapDatabaseConnectionFlushMemoryFlags_All];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertTrue([transaction numberOfCollections] == 2);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection1"] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection2"] == 0);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"collection1"]);
XCTAssertNil([transaction objectForKey:key1 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key2 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key3 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key4 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key5 inCollection:@"collection2"]);
}];
[connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertTrue([transaction numberOfCollections] == 2);
XCTAssertTrue([transaction numberOfKeysInCollection:nil] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection1"] == 5);
XCTAssertTrue([transaction numberOfKeysInCollection:@"collection2"] == 0);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:nil]);
XCTAssertNotNil([transaction objectForKey:key1 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key2 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key3 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key4 inCollection:@"collection1"]);
XCTAssertNotNil([transaction objectForKey:key5 inCollection:@"collection1"]);
XCTAssertNil([transaction objectForKey:key1 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key2 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key3 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key4 inCollection:@"collection2"]);
XCTAssertNil([transaction objectForKey:key5 inCollection:@"collection2"]);
}];
}
- (void)test2
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
/// Test concurrent connections.
///
/// Ensure that a read-only transaction can continue while a read-write transaction starts.
/// Ensure that a read-only transaction can start while a read-write transaction is in progress.
/// Ensure that a read-only transaction picks up the changes after a read-write transaction.
YapDatabaseConnection *connection1 = [database newConnection];
YapDatabaseConnection *connection2 = [database newConnection];
NSString *key = @"some-key";
TestObject *object = [TestObject generateTestObject];
TestObjectMetadata *metadata = [object extractMetadata];
dispatch_semaphore_t semaphore1 = dispatch_semaphore_create(0);
dispatch_semaphore_t semaphore2 = dispatch_semaphore_create(0);
dispatch_semaphore_t semaphore3 = dispatch_semaphore_create(0);
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
dispatch_semaphore_wait(semaphore1, DISPATCH_TIME_FOREVER);
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
[transaction setObject:object forKey:key inCollection:nil withMetadata:metadata];
dispatch_semaphore_signal(semaphore2);
[NSThread sleepForTimeInterval:0.4]; // Zzzzzzzzzzzzzzzzzzzzzzzzzz
}];
dispatch_semaphore_signal(semaphore3);
});
// This transaction will execute before the read-write transaction starts
[connection2 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertNil([transaction objectForKey:key inCollection:nil]);
XCTAssertNil([transaction metadataForKey:key inCollection:nil]);
}];
dispatch_semaphore_signal(semaphore1);
dispatch_semaphore_wait(semaphore2, DISPATCH_TIME_FOREVER);
// This transaction will execute after the read-write transaction has started, but before it has committed
[connection2 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertNil([transaction objectForKey:key inCollection:nil]);
XCTAssertNil([transaction metadataForKey:key inCollection:nil]);
}];
dispatch_semaphore_wait(semaphore3, DISPATCH_TIME_FOREVER);
// This transaction should start after the read-write transaction has completed
[connection2 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertNotNil([transaction objectForKey:key inCollection:nil]);
XCTAssertNotNil([transaction metadataForKey:key inCollection:nil]);
}];
}
- (void)test3
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
/// Test concurrent connections.
///
/// Ensure that a read-only transaction properly unblocks a blocked read-write transaction.
/// Need to turn on logging to check this.
YapDatabaseConnection *connection1 = [database newConnection];
YapDatabaseConnection *connection2 = [database newConnection];
NSString *key = @"some-key";
TestObject *object = [TestObject generateTestObject];
TestObjectMetadata *metadata = [object extractMetadata];
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(concurrentQueue, ^{
[NSThread sleepForTimeInterval:0.2]; // Zz
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
[transaction setObject:object forKey:key inCollection:nil withMetadata:metadata];
}];
});
// This transaction should before the read-write transaction
[connection2 readWithBlock:^(YapDatabaseReadTransaction *transaction){
[NSThread sleepForTimeInterval:1.0]; // Zzzzzzzzzzz
XCTAssertNil([transaction objectForKey:key inCollection:nil]);
XCTAssertNil([transaction metadataForKey:key inCollection:nil]);
}];
[NSThread sleepForTimeInterval:0.2]; // Zz
// This transaction should start after the read-write transaction
[connection2 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertNotNil([transaction objectForKey:key inCollection:nil]);
XCTAssertNotNil([transaction metadataForKey:key inCollection:nil]);
}];
}
- (void)testPropertyListSerializerDeserializer
{
YapDatabaseSerializer propertyListSerializer = [YapDatabase propertyListSerializer];
YapDatabaseDeserializer propertyListDeserializer = [YapDatabase propertyListDeserializer];
NSDictionary *originalDict = @{ @"date":[NSDate date], @"string":@"string" };
NSData *data = propertyListSerializer(@"collection", @"key", originalDict);
NSDictionary *deserializedDictionary = propertyListDeserializer(@"collection", @"key", data);
XCTAssertTrue([originalDict isEqualToDictionary:deserializedDictionary], @"PropertyList serialization broken");
}
- (void)testTimestampSerializerDeserializer
{
YapDatabaseSerializer timestampSerializer = [YapDatabase timestampSerializer];
YapDatabaseDeserializer timestampDeserializer = [YapDatabase timestampDeserializer];
NSDate *originalDate = [NSDate date];
NSData *data = timestampSerializer(@"collection", @"key", originalDate);
NSDate *deserializedDate = timestampDeserializer(@"collection", @"key", data);
XCTAssertTrue([originalDate isEqual:deserializedDate], @"Timestamp serialization broken");
}
- (void)testMutationDuringEnumerationProtection
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
// Ensure enumeration protects against mutation
YapDatabaseConnection *connection = [database newConnection];
[connection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
[transaction setObject:@"object" forKey:@"key1" inCollection:nil];
[transaction setObject:@"object" forKey:@"key2" inCollection:nil];
[transaction setObject:@"object" forKey:@"key3" inCollection:nil];
[transaction setObject:@"object" forKey:@"key4" inCollection:nil];
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
}];
NSArray *keys = @[@"key1", @"key2", @"key3"];
[connection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
// enumerateKeysInCollection:
XCTAssertThrows(
[transaction enumerateKeysInCollection:nil usingBlock:^(NSString *key, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysInCollection:nil usingBlock:^(NSString *key, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateKeysInAllCollectionsUsingBlock:
XCTAssertThrows(
[transaction enumerateKeysInAllCollectionsUsingBlock:^(NSString *collection, NSString *key, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysInAllCollectionsUsingBlock:^(NSString *collection, NSString *key, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateMetadataForKeys:inCollection:unorderedUsingBlock:
XCTAssertThrows(
[transaction enumerateMetadataForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateMetadataForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateObjectsForKeys:inCollection:unorderedUsingBlock:
XCTAssertThrows(
[transaction enumerateObjectsForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateObjectsForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateRowsForKeys:inCollection:unorderedUsingBlock:
XCTAssertThrows(
[transaction enumerateRowsForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateRowsForKeys:keys
inCollection:nil
unorderedUsingBlock:^(NSUInteger keyIndex, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateKeysAndMetadataInCollection:usingBlock:
XCTAssertThrows(
[transaction enumerateKeysAndMetadataInCollection:nil
usingBlock:^(NSString *key, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysAndMetadataInCollection:nil
usingBlock:^(NSString *key, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateKeysAndObjectsInCollection:usingBlock:
XCTAssertThrows(
[transaction enumerateKeysAndObjectsInCollection:nil
usingBlock:^(NSString *key, id object, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysAndObjectsInCollection:nil
usingBlock:^(NSString *key, id object, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateKeysAndMetadataInAllCollectionsUsingBlock:
XCTAssertThrows(
[transaction enumerateKeysAndMetadataInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysAndMetadataInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateKeysAndObjectsInAllCollectionsUsingBlock:
XCTAssertThrows(
[transaction enumerateKeysAndObjectsInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id object, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateKeysAndObjectsInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id object, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateRowsInCollection:usingBlock:
XCTAssertThrows(
[transaction enumerateRowsInCollection:nil
usingBlock:^(NSString *key, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateRowsInCollection:nil
usingBlock:^(NSString *key, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
// enumerateRowsInAllCollectionsUsingBlock:
XCTAssertThrows(
[transaction enumerateRowsInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
// Missing stop; Will cause exception.
}]);
XCTAssertNoThrow(
[transaction enumerateRowsInAllCollectionsUsingBlock:
^(NSString *collection, NSString *key, id object, id metadata, BOOL *stop) {
[transaction setObject:@"object" forKey:@"key5" inCollection:nil];
*stop = YES;
}]);
}];
}
- (void)testPermittedTransactions
{
#if YapDatabaseEnforcePermittedTransactions
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
// Ensure enumeration protects against mutation
YapDatabaseConnection *connection = [database newConnection];
// IMPORTANT NOTE:
//
// Within YapDatabaseConnection, the permittedTransaction is tested BEFORE the dispatch_async.
// So we can safely test exception throwing when invoking async transactions.
{// IMPLICIT YDB_AnyTransaction;
XCTAssertNoThrow([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnyReadTransaction;
XCTAssertNoThrow([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnyReadWriteTransaction;
XCTAssertThrows([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnySyncTransaction;
XCTAssertNoThrow([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnyAsyncTransaction;
XCTAssertThrows([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnyTransaction | YDB_MainThreadOnly;
XCTAssertNoThrow([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertNoThrow([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
}
{ connection.permittedTransactions = YDB_AnyTransaction | YDB_MainThreadOnly;
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
XCTAssertThrows([connection readWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection readWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
XCTAssertThrows([connection asyncReadWriteWithBlock:^(YapDatabaseReadTransaction *transaction){}]);
dispatch_semaphore_signal(semaphore);
});
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
}
#endif
}
- (void)testBackup_synchronous
{
NSUInteger count = 10000;
NSString *databaseBackupName = [NSString stringWithFormat:@"%@.backup", NSStringFromSelector(_cmd)];
NSString *databaseBackupPath = [self databasePath:databaseBackupName];
[[NSFileManager defaultManager] removeItemAtPath:databaseBackupPath error:NULL];
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
YapDatabaseConnection *connection = [database newConnection];
[connection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
for (int i = 0; i < count; i++)
{
NSString *str = [self randomLetters:100];
[transaction setObject:str forKey:str inCollection:nil];
}
}];
NSError *error = [connection backupToPath:databaseBackupPath];
XCTAssertNil(error, @"Error: %@", error);
}
{
YapDatabase *backupDatabase = [[YapDatabase alloc] initWithPath:databaseBackupPath];
XCTAssertNotNil(backupDatabase);
[[backupDatabase newConnection] readWithBlock:^(YapDatabaseReadTransaction *transaction) {
NSUInteger num = [transaction numberOfKeysInCollection:nil];
XCTAssertTrue(num == count, @"num(%lu) != count(%lu)", (unsigned long)num, (unsigned long)count);
}];
}
}
- (void)testBackup_asynchronous
{
NSUInteger count = 10000;
NSString *databaseBackupName = [NSString stringWithFormat:@"%@.backup", NSStringFromSelector(_cmd)];
NSString *databaseBackupPath = [self databasePath:databaseBackupName];
[[NSFileManager defaultManager] removeItemAtPath:databaseBackupPath error:NULL];
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
YapDatabaseConnection *connection = [database newConnection];
[connection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
for (int i = 0; i < count; i++)
{
NSString *str = [self randomLetters:100];
[transaction setObject:str forKey:str inCollection:nil];
}
}];
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
__block NSProgress *progress = nil;
progress = [connection asyncBackupToPath:databaseBackupPath
completionQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
completionBlock:^(NSError *error)
{
XCTAssertNil(error, @"Error: %@", error);
YapDatabase *backupDatabase = [[YapDatabase alloc] initWithPath:databaseBackupPath];
XCTAssertNotNil(backupDatabase);
[[backupDatabase newConnection] readWithBlock:^(YapDatabaseReadTransaction *transaction) {
NSUInteger num = [transaction numberOfKeysInCollection:nil];
XCTAssertTrue(num == count, @"num(%lu) != count(%lu)", (unsigned long)num, (unsigned long)count);
}];
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
XCTAssertTrue(progress.fractionCompleted >= 1.0, @"progress: %@", progress);
}
- (void)testVFS_standard
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[self _testVFS_withPath:databasePath options:nil];
}
- (void)testVFS_memoryMappedIO
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
// When using Memory Mapped IO, sqlite uses xFetch instead of xRead.
// Since this is a different code path, it's worthwhile to have different test cases.
YapDatabaseOptions *options = [[YapDatabaseOptions alloc] init];
options.pragmaMMapSize = (1024 * 1024 * 1); // in bytes
[self _testVFS_withPath:databasePath options:options];
}
- (void)_testVFS_withPath:(NSString *)databasePath options:(YapDatabaseOptions *)options
{
// Yap uses a vfs shim in order to send a notification which is useful
// in detecting when sqlite has acquired its snapshot.
//
// This allows read-only transactions to skip the sqlite machinery in certain circustances.
// Which is helpful, as a read-only transaction may only require the cache.
//
// However, this requires us to watch out for a particular edge case:
//
// - a read-write transaction that occurs AFTER a read-only transaction has started
// - the read-write transaction is ready to commit BEFORE the read-only transaction has
// acquired its sql-level snapshot
//
// In this case, we have to make the read-write transaction wait until the read-only transaction has
// acquired its sql-level snapshot. And we use a custom vfs shim in order to notify the read-only
// transaction of when the sql-level snapshot has been taken.
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath options:options];
XCTAssertNotNil(database);
YapDatabaseConnection *connection1 = [database newConnection];
YapDatabaseConnection *connection2 = [database newConnection];
dispatch_queue_t queue1 = dispatch_queue_create("completion_connection1", DISPATCH_QUEUE_SERIAL);
dispatch_queue_t queue2 = dispatch_queue_create("completion_connection2", DISPATCH_QUEUE_SERIAL);
dispatch_semaphore_t semaphore1 = dispatch_semaphore_create(0);
dispatch_semaphore_t semaphore2 = dispatch_semaphore_create(0);
[connection1 readWithBlock:^(YapDatabaseReadTransaction * _Nonnull transaction) {
// Force connection1 to acquire 'wal_file' instance.
}];
[connection1 asyncReadWithBlock:^(YapDatabaseReadTransaction * _Nonnull transaction) {
// NSLog(@"connection1: sleeping...");
[NSThread sleepForTimeInterval:4.0];
// NSLog(@"connection1: Done sleeping !");
NSUInteger numberOfCollections = [transaction numberOfCollections];
// NSLog(@"connection1: numberOfCollections = %lu", (unsigned long)numberOfCollections);
XCTAssert(numberOfCollections == 0);
} completionQueue:queue1 completionBlock:^{
dispatch_semaphore_signal(semaphore1);
}];
// Make sure connection1's read-only transaction starts BEFORE connection2's read-write transaction
[NSThread sleepForTimeInterval:1.0];
// NSLog(@"Starting readWrite transaction on connection2...");
[connection2 asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction * _Nonnull transaction) {
// NSLog(@"connection2: modifying database...");
[transaction setObject:@"object" forKey:@"key" inCollection:@"collection"];
NSUInteger numberOfCollections = [transaction numberOfCollections];
// NSLog(@"connection2: numberOfCollections = %lu", (unsigned long)numberOfCollections);
XCTAssert(numberOfCollections == 1);
} completionQueue:queue2 completionBlock:^{
dispatch_semaphore_signal(semaphore2);
}];
dispatch_semaphore_wait(semaphore1, DISPATCH_TIME_FOREVER);
dispatch_semaphore_wait(semaphore2, DISPATCH_TIME_FOREVER);
}
- (void)testDeadlockDetection
{
#ifndef NS_BLOCK_ASSERTIONS
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
YapDatabaseConnection *connection1 = [database newConnection];
YapDatabaseConnection *connection2 = [database newConnection];
[connection1 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertThrows([connection1 readWithBlock:^(YapDatabaseReadTransaction *ignore){}]);
}];
[connection1 readWithBlock:^(YapDatabaseReadTransaction *transaction){
XCTAssertThrows([connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *ignore){}]);
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertThrows([connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *ignore){}]);
}];
[connection1 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction){
XCTAssertThrows([connection2 readWriteWithBlock:^(YapDatabaseReadWriteTransaction *ignore){}]);
}];
#endif
}
- (void)testDoubleEnumeration
{
NSString *databasePath = [self databasePath:NSStringFromSelector(_cmd)];
[[NSFileManager defaultManager] removeItemAtPath:databasePath error:NULL];
YapDatabase *database = [[YapDatabase alloc] initWithPath:databasePath];
XCTAssertNotNil(database);
YapDatabaseConnection *connection = [database newConnection];
[connection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
[transaction setObject:@"New York Yankees" forKey:@"nyy" inCollection:@"teams"];
[transaction setObject:@"Boston Red Sox" forKey:@"brs" inCollection:@"teams"];
[transaction setObject:@"Mickey Mantle" forKey:@"1" inCollection:@"nyy"];
[transaction setObject:@"Derek Jeter" forKey:@"2" inCollection:@"nyy"];
[transaction setObject:@"Ted Williams" forKey:@"1" inCollection:@"brs"];
[transaction setObject:@"David Ortiz" forKey:@"2" inCollection:@"brs"];
}];
__block NSUInteger count = 0;
[connection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
[transaction enumerateKeysInCollection:@"teams" usingBlock:^(NSString *teamName, BOOL *stop) {
[transaction enumerateKeysInCollection:teamName usingBlock:^(NSString *player, BOOL *_stop) {
count++;
}];
}];
}];
XCTAssert(count == 4);
}
@end