mirror of
https://github.com/oxen-io/session-ios.git
synced 2023-12-13 21:30:14 +01:00
49 lines
1.8 KiB
Objective-C
49 lines
1.8 KiB
Objective-C
#import "SequenceCounterTest.h"
|
|
#import "SequenceCounter.h"
|
|
#import "TestUtil.h"
|
|
|
|
@implementation SequenceCounterTest
|
|
-(void)testCountingForwards {
|
|
SequenceCounter* s = [SequenceCounter sequenceCounter];
|
|
|
|
test([s convertNext:1] == (int64_t)1);
|
|
test([s convertNext:2] == (int64_t)2);
|
|
test([s convertNext:6] == (int64_t)6);
|
|
}
|
|
-(void)testCountingBackwards {
|
|
SequenceCounter* s = [SequenceCounter sequenceCounter];
|
|
|
|
test([s convertNext:UINT16_MAX] == (int64_t)-1);
|
|
test([s convertNext:UINT16_MAX-1] == (int64_t)-2);
|
|
test([s convertNext:UINT16_MAX-5] == (int64_t)-6);
|
|
}
|
|
-(void)testCountingLimits {
|
|
SequenceCounter* s = [SequenceCounter sequenceCounter];
|
|
|
|
uint16_t signedMin = (uint16_t)((int32_t)INT16_MIN + (1 << 16));
|
|
test([s convertNext:INT16_MAX] == (int64_t)INT16_MAX);
|
|
test([s convertNext:INT16_MAX] == (int64_t)INT16_MAX);
|
|
test([s convertNext:signedMin] == (int64_t)(INT16_MAX + 1));
|
|
test([s convertNext:signedMin] == (int64_t)(INT16_MAX + 1));
|
|
}
|
|
-(void)testCountingRandomizedDelta {
|
|
SequenceCounter* s = [SequenceCounter sequenceCounter];
|
|
|
|
int64_t prevLongId = 0;
|
|
uint16_t prevShortId = 0;
|
|
for (long i = 0; i < 1000; i++) {
|
|
int32_t delta = (int32_t)arc4random_uniform(1 << 16);
|
|
if (delta > INT16_MAX) delta -= 1 << 16;
|
|
int64_t nextLongId = prevLongId + delta;
|
|
uint16_t nextShortId = (uint16_t)(nextLongId & 0xFFFF);
|
|
int64_t actualNextLongId = [s convertNext:nextShortId];
|
|
if (nextLongId != actualNextLongId) {
|
|
XCTFail(@"Bad transition: %lld, %lld + %lld -> %lld, %lld != %lld", (long long)prevShortId, (long long)prevLongId, (long long)delta, (long long)nextShortId, (long long)actualNextLongId, (long long)nextLongId);
|
|
return;
|
|
}
|
|
prevLongId = nextLongId;
|
|
prevShortId = nextShortId;
|
|
}
|
|
}
|
|
@end
|