Add a test for useful.h.

Additionally add rotl, rotr which will be needed to implement some hashing
functions shortly.
	Change on 2014/12/15 by ctiller <ctiller@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=82149559

1 files changed, 59 insertions, 0 deletions

diff --git a/test/core/support/useful_test.c b/test/core/support/useful_test.c
new file mode 100644
index 0000000000..716861665b
--- /dev/null
+++ b/test/core/support/useful_test.c
@@ -0,0 +1,59 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/useful.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/log.h>
+#include "test/core/util/test_config.h"
+
+int main(int argc, char **argv) {
+  int four[4];
+  int five[5];
+  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((gpr_uint32)0x80000001, 1) == 3);
+  GPR_ASSERT(GPR_ROTR((gpr_uint32)0x80000001, 1) == 0xc0000000);
+  GPR_ASSERT(GPR_ARRAY_SIZE(four) == 4);
+  GPR_ASSERT(GPR_ARRAY_SIZE(five) == 5);
+
+  return 0;
+}