libdpkg: Add test cases for dpkg_error functions

lib/dpkg/test/.gitignore

@@ -3,6 +3,7 @@ t-arch
 t-buffer
 t-command
 t-deb-version
+t-error
 t-macros
 t-mod-db
 t-path

lib/dpkg/test/Makefile.am

@@ -16,6 +16,7 @@ check_PROGRAMS = \
 	t-test \
 	t-test-skip \
 	t-macros \
+	t-error \
 	t-string \
 	t-buffer \
 	t-path \

lib/dpkg/test/t-error.c

@@ -0,0 +1,82 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * t-error.c - test error message reporting
+ *
+ * Copyright © 2014 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <dpkg/test.h>
+#include <dpkg/error.h>
+
+static void
+test_dpkg_error_put(void)
+{
+	struct dpkg_error err = DPKG_ERROR_INIT;
+	char *errstr_ref = NULL;
+
+	test_pass(err.type == DPKG_MSG_NONE);
+	test_pass(err.str == NULL);
+
+	test_pass(dpkg_put_warn(NULL, "void error") < 0);
+	test_pass(dpkg_put_error(NULL, "void error") < 0);
+	test_pass(dpkg_put_errno(NULL, "void error") < 0);
+
+	test_pass(dpkg_put_warn(&err, "test warning %d", 10) < 0);
+	test_str(err.str, ==, "test warning 10");
+	test_warn(err);
+
+	test_pass(dpkg_put_error(&err, "test error %d", 20) < 0);
+	test_str(err.str, ==, "test error 20");
+	test_error(err);
+
+	errno = ENOENT;
+	if (asprintf(&errstr_ref, "test errno 30 (%s)", strerror(errno)) < 0)
+		test_bail("cannot allocate string");
+	test_pass(dpkg_put_errno(&err, "test errno %d", 30) < 0);
+	test_str(err.str, ==, errstr_ref);
+	test_error(err);
+	free(errstr_ref);
+	errno = 0;
+}
+
+static void
+test_dpkg_error_destroy(void)
+{
+	struct dpkg_error err = DPKG_ERROR_INIT;
+
+	test_pass(dpkg_put_error(&err, "test destroy") < 0);
+	test_pass(err.type == DPKG_MSG_ERROR);
+	test_pass(err.str != NULL);
+	dpkg_error_destroy(&err);
+	test_pass(err.type == DPKG_MSG_NONE);
+	test_pass(err.str == NULL);
+}
+
+static void
+test(void)
+{
+	test_plan(19);
+
+	test_dpkg_error_put();
+	test_dpkg_error_destroy();
+}