ci(test): add unit test for lv_list (#4032)

tests/src/test_cases/test_list.c

@@ -0,0 +1,64 @@
+#if LV_BUILD_TEST
+#include "../lvgl.h"
+
+#include "unity/unity.h"
+
+static lv_obj_t * list;
+
+void setUp(void)
+{
+    list = lv_list_create(lv_scr_act());
+}
+
+void tearDown(void)
+{
+
+}
+
+void test_list_get_text_from_added_button(void)
+{
+    const char * message = "LVGL Rocks!";
+    lv_obj_t * button_ok = lv_list_add_btn(list, LV_SYMBOL_OK, message);
+
+    TEST_ASSERT_EQUAL_STRING(message, lv_list_get_btn_text(list, button_ok));
+}
+
+void test_list_get_text_from_button_without_symbol(void)
+{
+    const char * message = "LVGL Rocks!";
+    lv_obj_t * button_ok = lv_list_add_btn(list, NULL, message);
+
+    TEST_ASSERT_EQUAL_STRING(message, lv_list_get_btn_text(list, button_ok));
+}
+
+void test_list_gets_empty_text_from_button_without_text(void)
+{
+    const char * empty_text = "";
+    lv_obj_t * button_ok = lv_list_add_btn(list, NULL, NULL);
+
+    TEST_ASSERT_EQUAL_STRING(empty_text, lv_list_get_btn_text(list, button_ok));
+}
+
+void test_list_get_text_from_label(void)
+{
+    const char * message = "LVGL Rocks!";
+    lv_obj_t * label = lv_list_add_text(list, message);
+
+    TEST_ASSERT_EQUAL_STRING(message, lv_label_get_text(label));
+}
+
+void test_list_snapshot(void)
+{
+    lv_obj_t * snapshot_list = lv_list_create(lv_scr_act());
+
+    lv_list_add_text(snapshot_list, "File");
+    lv_list_add_btn(snapshot_list, LV_SYMBOL_FILE, "New");
+    lv_list_add_btn(snapshot_list, LV_SYMBOL_DIRECTORY, "Open");
+    lv_list_add_btn(snapshot_list, LV_SYMBOL_SAVE, "Save");
+
+    lv_obj_center(snapshot_list);
+
+    TEST_ASSERT_EQUAL_SCREENSHOT("list_1.png");
+}
+
+#endif