Tests for parse_accept_encoding

src/or/directory.c

@@ -2792,7 +2792,7 @@ write_http_response_header(dir_connection_t *conn, ssize_t length,
 /** Parse the compression methods listed in an Accept-Encoding header <b>h</b>,
  * and convert them to a bitfield where compression method x is supported if
  * and only if 1 &lt;&lt; x is set in the bitfield. */
-static unsigned
+STATIC unsigned
 parse_accept_encoding_header(const char *h)
 {
   unsigned result = (1u << NO_METHOD);

src/or/directory.h

@@ -192,6 +192,7 @@ STATIC int next_random_exponential_delay(int delay, int max_delay);
 STATIC int parse_hs_version_from_post(const char *url, const char *prefix,
                                       const char **end_pos);
 
+STATIC unsigned parse_accept_encoding_header(const char *h);
 #endif
 
 #endif

src/test/test_dir_handle_get.c

@@ -2497,6 +2497,52 @@ test_dir_handle_get_status_vote_current_authority(void* data)
     dirvote_free_all();
 }
 
+static void
+test_dir_handle_get_parse_accept_encoding(void *arg)
+{
+  (void)arg;
+  const unsigned B_NONE = 1u << NO_METHOD;
+  const unsigned B_ZLIB = 1u << ZLIB_METHOD;
+  const unsigned B_GZIP = 1u << GZIP_METHOD;
+  const unsigned B_LZMA = 1u << LZMA_METHOD;
+  const unsigned B_ZSTD = 1u << ZSTD_METHOD;
+
+  unsigned encodings;
+
+  encodings = parse_accept_encoding_header("");
+  tt_uint_op(B_NONE, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("  ");
+  tt_uint_op(B_NONE, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("dewey, cheatham, and howe ");
+  tt_uint_op(B_NONE, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("dewey, cheatham, and gzip");
+  tt_uint_op(B_NONE, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("dewey, cheatham, and, gzip");
+  tt_uint_op(B_NONE|B_GZIP, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header(" gzip");
+  tt_uint_op(B_NONE|B_GZIP, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("gzip");
+  tt_uint_op(B_NONE|B_GZIP, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("x-zstd, deflate, x-lzma");
+  tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("x-zstd, deflate, x-lzma, gzip");
+  tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA|B_GZIP, OP_EQ, encodings);
+
+  encodings = parse_accept_encoding_header("x-zstd,deflate,x-lzma,gzip");
+  tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA|B_GZIP, OP_EQ, encodings);
+
+ done:
+  ;
+}
+
 #define DIR_HANDLE_CMD(name,flags) \
   { #name, test_dir_handle_get_##name, (flags), NULL, NULL }
 
@@ -2555,6 +2601,7 @@ struct testcase_t dir_handle_get_tests[] = {
   DIR_HANDLE_CMD(status_vote_next_consensus_signatures_not_found, 0),
   DIR_HANDLE_CMD(status_vote_next_consensus_signatures_busy, 0),
   DIR_HANDLE_CMD(status_vote_next_consensus_signatures, 0),
+  DIR_HANDLE_CMD(parse_accept_encoding, 0),
   END_OF_TESTCASES
 };