Write a test for CONF_parse_list.

Change-Id: Ied447b1e852b3b9b2bdc9617fa65a0cc1f425f7f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/54470
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

crypto/conf/conf_test.cc

diff --git a/crypto/conf/conf_test.cc b/crypto/conf/conf_test.cc
index 65938e1..fe03c5f 100644
--- a/crypto/conf/conf_test.cc
+++ b/crypto/conf/conf_test.cc
@@ -12,11 +12,16 @@
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
 
+#include <string>
+#include <vector>
+
 #include <openssl/bio.h>
 #include <openssl/conf.h>
 
 #include <gtest/gtest.h>
 
+#include "internal.h"
+
 
 TEST(ConfTest, Parse) {
   // Check that basic parsing works. (We strongly recommend that people don't
@@ -42,3 +47,54 @@
   EXPECT_STREQ(NCONF_get_string(conf.get(), "section_name", "key"), "value2");
   EXPECT_STREQ(NCONF_get_string(conf.get(), "other_section", "key"), nullptr);
 }
+
+TEST(ConfTest, ParseList) {
+  const struct {
+    const char *list;
+    char sep;
+    bool remove_whitespace;
+    std::vector<std::string> expected;
+  } kTests[] = {
+      {"", ',', /*remove_whitespace=*/0, {""}},
+      {"", ',', /*remove_whitespace=*/1, {""}},
+
+      {" ", ',', /*remove_whitespace=*/0, {" "}},
+      {" ", ',', /*remove_whitespace=*/1, {""}},
+
+      {"hello world", ',', /*remove_whitespace=*/0, {"hello world"}},
+      {"hello world", ',', /*remove_whitespace=*/1, {"hello world"}},
+
+      {" hello world ", ',', /*remove_whitespace=*/0, {" hello world "}},
+      {" hello world ", ',', /*remove_whitespace=*/1, {"hello world"}},
+
+      {"hello,world", ',', /*remove_whitespace=*/0, {"hello", "world"}},
+      {"hello,world", ',', /*remove_whitespace=*/1, {"hello", "world"}},
+
+      {"hello,,world", ',', /*remove_whitespace=*/0, {"hello", "", "world"}},
+      {"hello,,world", ',', /*remove_whitespace=*/1, {"hello", "", "world"}},
+
+      {"\tab cd , , ef gh ",
+       ',',
+       /*remove_whitespace=*/0,
+       {"\tab cd ", " ", " ef gh "}},
+      {"\tab cd , , ef gh ",
+       ',',
+       /*remove_whitespace=*/1,
+       {"ab cd", "", "ef gh"}},
+  };
+  for (const auto& t : kTests) {
+    SCOPED_TRACE(t.list);
+    SCOPED_TRACE(t.sep);
+    SCOPED_TRACE(t.remove_whitespace);
+
+    std::vector<std::string> result;
+    auto append_to_vector = [](const char *elem, size_t len, void *arg) -> int {
+      auto *vec = static_cast<std::vector<std::string> *>(arg);
+      vec->push_back(std::string(elem, len));
+      return 1;
+    };
+    ASSERT_TRUE(CONF_parse_list(t.list, t.sep, t.remove_whitespace,
+                                append_to_vector, &result));
+    EXPECT_EQ(result, t.expected);
+  }
+}

crypto/conf/internal.h

diff --git a/crypto/conf/internal.h b/crypto/conf/internal.h
index 7fe4226..6075548 100644
--- a/crypto/conf/internal.h
+++ b/crypto/conf/internal.h
@@ -31,9 +31,9 @@
 // example. If |list_cb| returns <= 0, then the iteration is halted and that
 // value is returned immediately. Otherwise it returns one. Note that |list_cb|
 // may be called on an empty member.
-int CONF_parse_list(const char *list, char sep, int remove_whitespace,
-                    int (*list_cb)(const char *elem, size_t len, void *usr),
-                    void *arg);
+OPENSSL_EXPORT int CONF_parse_list(
+    const char *list, char sep, int remove_whitespace,
+    int (*list_cb)(const char *elem, size_t len, void *usr), void *arg);
 
 
 #if defined(__cplusplus)