public void InvalidateToken_HeaderNotSet_DoesNothing(string idempotencyKey) { //arrange SetMockRequestIdempotencyKey(idempotencyKey); //act _idempotencyContext.InvalidateToken(); //assert _cache.Verify(x => x.Set(It.IsAny <string>(), It.IsAny <string>(), It.IsAny <DateTimeOffset?>()), Times.Never); }