1 files changed, 58 insertions, 0 deletions
diff --git a/test/core/gpr/useful_test.cc b/test/core/gpr/useful_test.cc
new file mode 100644
index 0000000000..2f86010d77
--- /dev/null
+++ b/test/core/gpr/useful_test.cc
@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/useful.h>
+#include "test/core/util/test_config.h"
+
+int main(int argc, char** argv) {
+  int four[4];
+  int five[5];
+  uint32_t bitset = 0;
+  grpc_test_init(argc, argv);
+
+  GPR_ASSERT(GPR_MIN(1, 2) == 1);
+  GPR_ASSERT(GPR_MAX(1, 2) == 2);
+  GPR_ASSERT(GPR_MIN(2, 1) == 1);
+  GPR_ASSERT(GPR_MAX(2, 1) == 2);
+  GPR_ASSERT(GPR_CLAMP(1, 0, 2) == 1);
+  GPR_ASSERT(GPR_CLAMP(0, 0, 2) == 0);
+  GPR_ASSERT(GPR_CLAMP(2, 0, 2) == 2);
+  GPR_ASSERT(GPR_CLAMP(-1, 0, 2) == 0);
+  GPR_ASSERT(GPR_CLAMP(3, 0, 2) == 2);
+  GPR_ASSERT(GPR_ROTL((uint32_t)0x80000001, 1) == 3);
+  GPR_ASSERT(GPR_ROTR((uint32_t)0x80000001, 1) == 0xc0000000);
+  GPR_ASSERT(GPR_ARRAY_SIZE(four) == 4);
+  GPR_ASSERT(GPR_ARRAY_SIZE(five) == 5);
+
+  GPR_ASSERT(GPR_BITCOUNT((1u << 31) - 1) == 31);
+  GPR_ASSERT(GPR_BITCOUNT(1u << 3) == 1);
+  GPR_ASSERT(GPR_BITCOUNT(0) == 0);
+
+  GPR_ASSERT(GPR_BITSET(&bitset, 3) == 8);
+  GPR_ASSERT(GPR_BITCOUNT(bitset) == 1);
+  GPR_ASSERT(GPR_BITGET(bitset, 3) == 1);
+  GPR_ASSERT(GPR_BITSET(&bitset, 1) == 10);
+  GPR_ASSERT(GPR_BITCOUNT(bitset) == 2);
+  GPR_ASSERT(GPR_BITCLEAR(&bitset, 3) == 2);
+  GPR_ASSERT(GPR_BITCOUNT(bitset) == 1);
+  GPR_ASSERT(GPR_BITGET(bitset, 3) == 0);
+
+  return 0;
+}