Add test of varint encoding for hpack

1 files changed, 66 insertions, 0 deletions

diff --git a/test/core/transport/chttp2/varint_test.c b/test/core/transport/chttp2/varint_test.c
new file mode 100644
index 0000000000..dc4447af5c
--- /dev/null
+++ b/test/core/transport/chttp2/varint_test.c
@@ -0,0 +1,66 @@
+/*
+ *
+ * Copyright 2015, 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/transport/chttp2/varint.h"
+
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+
+#include "test/core/util/test_config.h"
+
+static void test_varint(gpr_uint32 value, int prefix_bits, gpr_uint8 prefix_or, const char *expect_bytes, size_t expect_length) {
+  gpr_uint32 nbytes = GRPC_CHTTP2_VARINT_LENGTH(value, prefix_bits);
+  gpr_slice expect = gpr_slice_from_copied_buffer(expect_bytes, expect_length);
+  gpr_slice slice;
+  gpr_log(GPR_DEBUG, "Test: 0x%08x", value);
+  GPR_ASSERT(nbytes == expect_length);
+  slice = gpr_slice_malloc(nbytes);
+  GRPC_CHTTP2_WRITE_VARINT(value, prefix_bits, prefix_or, GPR_SLICE_START_PTR(slice), nbytes);
+  GPR_ASSERT(gpr_slice_cmp(expect, slice) == 0);
+  gpr_slice_unref(expect);
+  gpr_slice_unref(slice);
+}
+
+#define TEST_VARINT(value, prefix_bits, prefix_or, expect) \
+  test_varint(value, prefix_bits, prefix_or, expect, sizeof(expect)-1)
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  TEST_VARINT(0, 1, 0, "\x00");
+  TEST_VARINT(128, 1, 0, "\x7f\x01");
+  TEST_VARINT(16384, 1, 0, "\x7f\x81\x7f");
+  TEST_VARINT(2097152, 1, 0, "\x7f\x81\xff\x7f");
+  TEST_VARINT(268435456, 1, 0, "\x7f\x81\xff\xff\x7f");
+  TEST_VARINT(0xffffffff, 1, 0, "\x7f\x80\xff\xff\xff\x0f");
+  return 0;
+}