Add a test for CONF_parse_list.

Change-Id: I7af0753cac07756a75d03a4820a16f3f8b18d7ba
Reviewed-on: https://boringssl-review.googlesource.com/3026
Reviewed-by: Adam Langley <agl@google.com>

crypto/conf/CMakeLists.txt

@@ -8,3 +8,11 @@ add_library(
 	conf.c
 	conf_error.c
 )
+
+add_executable(
+	conf_test
+
+	conf_test.c
+)
+
+target_link_libraries(conf_test crypto)

crypto/conf/conf_test.c

@@ -0,0 +1,129 @@
+/* Copyright (c) 2014, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/conf.h>
+#include <openssl/crypto.h>
+
+
+static int stop_cb(const char *elem, int len, void *data) {
+  int *count = (int *)data;
+  (*count)++;
+  return -42;
+}
+
+static int test_stop_iteration(void) {
+  int count = 0;
+  if (CONF_parse_list("foo|bar", '|', 0, stop_cb, &count) != -42) {
+    fprintf(stderr, "CONF_parse_list returned incorrect value.\n");
+    return 0;
+  }
+
+  if (count != 1) {
+    fprintf(stderr, "stop_cb called incorrect number of times.\n");
+    return 0;
+  }
+
+  return 1;
+}
+
+static int test_cb(const char *elem, int len, void *data) {
+  const char ***ptr = data;
+  const char **next = *ptr;
+  if (*next == NULL) {
+    /* The callback hit the trailing NULL early. */
+    fprintf(stderr, "test_cb called too many times.\n");
+    return 0;
+  }
+  if (len < 0 || (size_t)len != strlen(*next) ||
+      strncmp(elem, *next, len) != 0) {
+    fprintf(stderr, "test_cb called on '%.*s', wanted '%s'\n", len, elem, *next);
+    return 0;
+  }
+  /* Advance to the next expectation. */
+  *ptr = next + 1;
+  return 1;
+}
+
+static int test_parse_list(const char *list, int remove_whitespace,
+                           const char **expected) {
+  const char **next = expected;
+  if (!CONF_parse_list(list, ',', remove_whitespace, test_cb, &next)) {
+    return 0;
+  }
+  if (*next != NULL) {
+    fprintf(stderr, "test_cb called too few times.\n");
+    return 0;
+  }
+  return 1;
+}
+
+/* Test basic parsing. Whitespace is not trimmed, empty entries are
+ * preserved. */
+static const char kList1[] = " foo ,, bar , baz ";
+static const int kRemoveWhitespace1 = 0;
+static const char *kExpected1[] = {
+    " foo ",
+    "",
+    " bar ",
+    " baz ",
+    NULL,
+};
+
+/* Test that a trailing separator gives an empty entry. */
+static const char kList2[] = "foo,bar,baz,";
+static const int kRemoveWhitespace2 = 0;
+static const char *kExpected2[] = {
+    "foo",
+    "bar",
+    "baz",
+    "",
+    NULL,
+};
+
+/* Test whitespace removal. */
+static const char kList3[] = " foo ,\n,bar\t, baz ";
+static const int kRemoveWhitespace3 = 1;
+static const char *kExpected3[] = {
+    "foo",
+    "",
+    "bar",
+    "baz",
+    NULL,
+};
+
+/* Test empty string behavior. */
+static const char kList4[] = "";
+static const int kRemoveWhitespace4 = 0;
+static const char *kExpected4[] = {
+    "",
+    NULL,
+};
+
+int main(void) {
+  CRYPTO_library_init();
+
+  if (!test_stop_iteration() ||
+      !test_parse_list(kList1, kRemoveWhitespace1, kExpected1) ||
+      !test_parse_list(kList2, kRemoveWhitespace2, kExpected2) ||
+      !test_parse_list(kList3, kRemoveWhitespace3, kExpected3) ||
+      !test_parse_list(kList4, kRemoveWhitespace4, kExpected4)) {
+    return 1;
+  }
+
+  printf("PASS\n");
+  return 0;
+}

util/all_tests.sh

@@ -46,6 +46,7 @@ TESTS="
 ./crypto/cipher/aead_test aes-256-cbc-sha1-ssl3 $SRC/crypto/cipher/test/aes_256_cbc_sha1_ssl3_tests.txt
 ./crypto/cipher/aead_test des-ede3-cbc-sha1-ssl3 $SRC/crypto/cipher/test/des_ede3_cbc_sha1_ssl3_tests.txt
 ./crypto/cipher/cipher_test $SRC/crypto/cipher/test/cipher_test.txt
+./crypto/conf/conf_test
 ./crypto/constant_time_test
 ./crypto/dh/dh_test
 ./crypto/digest/digest_test