fix: make dialog_file_browser_set_basic_options initialize all fields (#2756)

* fix: make `dialog_file_browser_set_basic_options` initialize all fields
* fix(GH-2756): use alternative test for `test_dialog_file_browser_set_basic_options_should_init_all_fields`

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

CODING_STYLE.md

@@ -48,7 +48,7 @@ Almost everything in flipper firmware is built around this concept.
 # C coding style
 
 - Tab is 4 spaces
-- Use `fbt format` to reformat source code and check style guide before commit
+- Use `./fbt format` to reformat source code and check style guide before commit
 
 ## Naming
 

applications/debug/unit_tests/dialogs/dialogs_file_browser_options.c

@@ -0,0 +1,32 @@
+#include <dialogs/dialogs.h>
+
+#include "../minunit.h"
+
+MU_TEST(test_dialog_file_browser_set_basic_options_should_init_all_fields) {
+    mu_assert(
+        sizeof(DialogsFileBrowserOptions) == 28,
+        "Changes to `DialogsFileBrowserOptions` should also be reflected in `dialog_file_browser_set_basic_options`");
+
+    DialogsFileBrowserOptions options;
+    dialog_file_browser_set_basic_options(&options, ".fap", NULL);
+    // note: this assertions can safely be changed, their primary purpose is to remind the maintainer
+    // to update `dialog_file_browser_set_basic_options` by including all structure fields in it
+    mu_assert_string_eq(".fap", options.extension);
+    mu_assert_null(options.base_path);
+    mu_assert(options.skip_assets, "`skip_assets` should default to `true");
+    mu_assert(options.hide_dot_files, "`hide_dot_files` should default to `true");
+    mu_assert_null(options.icon);
+    mu_assert(options.hide_ext, "`hide_ext` should default to `true");
+    mu_assert_null(options.item_loader_callback);
+    mu_assert_null(options.item_loader_context);
+}
+
+MU_TEST_SUITE(dialogs_file_browser_options) {
+    MU_RUN_TEST(test_dialog_file_browser_set_basic_options_should_init_all_fields);
+}
+
+int run_minunit_test_dialogs_file_browser_options() {
+    MU_RUN_SUITE(dialogs_file_browser_options);
+
+    return MU_EXIT_CODE;
+}

applications/debug/unit_tests/test_index.c

@@ -27,6 +27,7 @@ int run_minunit_test_nfc();
 int run_minunit_test_bit_lib();
 int run_minunit_test_float_tools();
 int run_minunit_test_bt();
+int run_minunit_test_dialogs_file_browser_options();
 
 typedef int (*UnitTestEntry)();
 
@@ -55,6 +56,8 @@ const UnitTest unit_tests[] = {
     {.name = "bit_lib", .entry = run_minunit_test_bit_lib},
     {.name = "float_tools", .entry = run_minunit_test_float_tools},
     {.name = "bt", .entry = run_minunit_test_bt},
+    {.name = "dialogs_file_browser_options",
+     .entry = run_minunit_test_dialogs_file_browser_options},
 };
 
 void minunit_print_progress() {

applications/services/dialogs/dialogs.c

@@ -9,12 +9,13 @@ void dialog_file_browser_set_basic_options(
     const char* extension,
     const Icon* icon) {
     options->extension = extension;
+    options->base_path = NULL;
     options->skip_assets = true;
+    options->hide_dot_files = true;
     options->icon = icon;
     options->hide_ext = true;
     options->item_loader_callback = NULL;
     options->item_loader_context = NULL;
-    options->base_path = NULL;
 }
 
 static DialogsApp* dialogs_app_alloc() {

applications/services/dialogs/dialogs.h

@@ -16,7 +16,8 @@ typedef struct DialogsApp DialogsApp;
 /****************** FILE BROWSER ******************/
 
 /**
- * File browser dialog extra options
+ * File browser dialog extra options.
+ * This can be default-initialized using {@link dialog_file_browser_set_basic_options}.
  * @param extension file extension to be offered for selection
  * @param base_path root folder path for navigation with back key
  * @param skip_assets true - do not show assets folders
@@ -38,8 +39,10 @@ typedef struct {
 } DialogsFileBrowserOptions;
 
 /**
- * Initialize file browser dialog options
+ * Initialize file browser dialog options and set default values.
- * and set default values
+ * This is guaranteed to initialize all fields
+ * so it is safe to pass pointer to uninitialized {@code options}
+ * and assume that the data behind it becomes fully initialized after the call.
  * @param options pointer to options structure
  * @param extension file extension to filter
  * @param icon file icon pointer, NULL for default icon