Add test for fetch proxy memleak

tests/online/fetch.c

@@ -3,9 +3,19 @@
 static git_repository *_repo;
 static int counter;
 
+static char *_remote_proxy_scheme = NULL;
+static char *_remote_proxy_host = NULL;
+static char *_remote_proxy_user = NULL;
+static char *_remote_proxy_pass = NULL;
+
 void test_online_fetch__initialize(void)
 {
 	cl_git_pass(git_repository_init(&_repo, "./fetch", 0));
+
+    _remote_proxy_scheme = cl_getenv("GITTEST_REMOTE_PROXY_SCHEME");
+    _remote_proxy_host = cl_getenv("GITTEST_REMOTE_PROXY_HOST");
+    _remote_proxy_user = cl_getenv("GITTEST_REMOTE_PROXY_USER");
+    _remote_proxy_pass = cl_getenv("GITTEST_REMOTE_PROXY_PASS");
 }
 
 void test_online_fetch__cleanup(void)
@@ -14,6 +24,11 @@ void test_online_fetch__cleanup(void)
 	_repo = NULL;
 
 	cl_fixture_cleanup("./fetch");
+
+    git__free(_remote_proxy_scheme);
+    git__free(_remote_proxy_host);
+    git__free(_remote_proxy_user);
+    git__free(_remote_proxy_pass);
 }
 
 static int update_tips(const char *refname, const git_oid *a, const git_oid *b, void *data)
@@ -207,3 +222,28 @@ void test_online_fetch__twice(void)
 
 	git_remote_free(remote);
 }
+
+void test_online_fetch__proxy(void)
+{
+    git_remote *remote;
+    git_buf url = GIT_BUF_INIT;
+    git_fetch_options fetch_opts;
+
+    if (!_remote_proxy_host || !_remote_proxy_user || !_remote_proxy_pass)
+        cl_skip();
+
+    cl_git_pass(git_buf_printf(&url, "%s://%s:%s@%s/",
+        _remote_proxy_scheme ? _remote_proxy_scheme : "http",
+        _remote_proxy_user, _remote_proxy_pass, _remote_proxy_host));
+
+    cl_git_pass(git_fetch_options_init(&fetch_opts, GIT_FETCH_OPTIONS_VERSION));
+    fetch_opts.proxy_opts.type = GIT_PROXY_SPECIFIED;
+    fetch_opts.proxy_opts.url = url.ptr;
+
+    cl_git_pass(git_remote_create(&remote, _repo, "test", "https://github.com/libgit2/TestGitRepository.git"));
+    cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, &fetch_opts.proxy_opts, NULL));
+    cl_git_pass(git_remote_fetch(remote, NULL, &fetch_opts, NULL));
+
+    git_remote_free(remote);
+    git_buf_dispose(&url);
+}