3 files changed, 20 insertions, 0 deletions
diff --git a/tests/test_cmd_alias.c b/tests/test_cmd_alias.c
index bdb16ede..b337b49a 100644
--- a/tests/test_cmd_alias.c
+++ b/tests/test_cmd_alias.c
@@ -94,6 +94,22 @@ void cmd_alias_add_adds_alias(void **state)
     free(help);
 }
 
+void cmd_alias_add_shows_message_when_exists(void **state)
+{
+    mock_cons_show();
+    CommandHelp *help = malloc(sizeof(CommandHelp));
+    gchar *args[] = { "add", "hc", "/help commands", NULL };
+
+    prefs_add_alias("hc", "/help commands");
+
+    expect_cons_show("Command alias /hc already exists.");
+
+    gboolean result = cmd_alias(args, *help);
+    assert_true(result);
+
+    free(help);
+}
+
 void cmd_alias_remove_removes_alias(void **state)
 {
     mock_cons_show();
diff --git a/tests/test_cmd_alias.h b/tests/test_cmd_alias.h
index 1f2df5cd..bd93ef1a 100644
--- a/tests/test_cmd_alias.h
+++ b/tests/test_cmd_alias.h
@@ -3,6 +3,7 @@ void cmd_alias_add_shows_usage_when_no_value(void **state);
 void cmd_alias_remove_shows_usage_when_no_args(void **state);
 void cmd_alias_show_usage_when_invalid_subcmd(void **state);
 void cmd_alias_add_adds_alias(void **state);
+void cmd_alias_add_shows_message_when_exists(void **state);
 void cmd_alias_remove_removes_alias(void **state);
 void cmd_alias_remove_shows_message_when_no_alias(void **state);
 void cmd_alias_list_shows_all_aliases(void **state);
diff --git a/tests/testsuite.c b/tests/testsuite.c
index af42fe7c..1e847716 100644
--- a/tests/testsuite.c
+++ b/tests/testsuite.c
@@ -399,6 +399,9 @@ int main(int argc, char* argv[]) {
         unit_test_setup_teardown(cmd_alias_add_adds_alias,
             create_config_file,
             delete_config_file),
+        unit_test_setup_teardown(cmd_alias_add_shows_message_when_exists,
+            create_config_file,
+            delete_config_file),
         unit_test_setup_teardown(cmd_alias_remove_removes_alias,
             create_config_file,
             delete_config_file),