Added test for C

src/core/lib/surface/byte_buffer_reader.c

@@ -67,7 +67,7 @@ int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
                                 &decompressed_slices_buffer) == 0) {
           gpr_log(GPR_ERROR,
                   "Unexpected error decompressing data for algorithm with enum "
-                  "value '%d'. Reading data as if it were uncompressed.",
+                  "value '%d'.",
                   reader->buffer_in->data.raw.compression);
           memset(reader, 0, sizeof(*reader));
           return 0;

test/core/surface/byte_buffer_reader_test.c

@@ -115,6 +115,20 @@ static void test_read_none_compressed_slice(void) {
   grpc_byte_buffer_destroy(buffer);
 }
 
+static void test_read_corrupted_slice(void) {
+  gpr_slice slice;
+  grpc_byte_buffer *buffer;
+  grpc_byte_buffer_reader reader;
+
+  LOG_TEST(__func__);
+  slice = gpr_slice_from_copied_string("test");
+  buffer = grpc_raw_byte_buffer_create(&slice, 1);
+  buffer->data.raw.compression = GRPC_COMPRESS_GZIP; /* lies! */
+  gpr_slice_unref(slice);
+  GPR_ASSERT(!grpc_byte_buffer_reader_init(&reader, buffer));
+  grpc_byte_buffer_destroy(buffer);
+}
+
 static void read_compressed_slice(grpc_compression_algorithm algorithm,
                                   size_t input_size) {
   gpr_slice input_slice;
@@ -267,6 +281,7 @@ int main(int argc, char **argv) {
   test_read_none_compressed_slice();
   test_read_gzip_compressed_slice();
   test_read_deflate_compressed_slice();
+  test_read_corrupted_slice();
   test_byte_buffer_from_reader();
   test_byte_buffer_copy();
   test_readall();