1 files changed, 87 insertions, 0 deletions
diff --git a/test/core/support/murmur_hash_test.c b/test/core/support/murmur_hash_test.c
new file mode 100644
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+++ b/test/core/support/murmur_hash_test.c
@@ -0,0 +1,87 @@
+/*
+ *
+ * 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 "src/core/support/murmur_hash.h"
+#include <grpc/support/log.h>
+#include "test/core/util/test_config.h"
+
+#include <string.h>
+
+typedef gpr_uint32 (*hash_func)(const void *key, size_t len, gpr_uint32 seed);
+
+/* From smhasher:
+   This should hopefully be a thorough and uambiguous test of whether a hash
+   is correctly implemented on a given platform */
+
+static void verification_test(hash_func hash, gpr_uint32 expected) {
+  gpr_uint8 key[256];
+  gpr_uint32 hashes[256];
+  gpr_uint32 final = 0;
+  int i;
+
+  memset(key, 0, sizeof(key));
+  memset(hashes, 0, sizeof(hashes));
+
+  /* Hash keys of the form {0}, {0,1}, {0,1,2}... up to N=255,using 256-N as
+     the seed */
+
+  for (i = 0; i < 256; i++) {
+    key[i] = (uint8_t)i;
+    hashes[i] = hash(key, i, 256 - i);
+  }
+
+  /* Then hash the result array */
+
+  final = hash(hashes, sizeof(hashes), 0);
+
+  /* The first four bytes of that hash, interpreted as a little-endian integer,
+     is our
+     verification value */
+
+  if (expected != final) {
+    gpr_log(GPR_INFO, "Verification value 0x%08X : Failed! (Expected 0x%08x)",
+            final, expected);
+    abort();
+  } else {
+    gpr_log(GPR_INFO, "Verification value 0x%08X : Passed!", final);
+  }
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  /* basic tests to verify that things don't crash */
+  gpr_murmur_hash3("", 0, 0);
+  gpr_murmur_hash3("xyz", 3, 0);
+  verification_test(gpr_murmur_hash3, 0xB0F57EE3);
+  return 0;
+}