### Changes

Fixes #3: Error on DBI when files or folders contains special characters.

### Additional changes
* Added unit and feature tests
* Fix file size display
* Run tests on CI/CD
* Publish docker image on release

www/tests/Unit/ExampleTest.php

@@ -1,5 +0,0 @@
-<?php
-
-test('that true is true', function () {
-    expect(true)->toBeTrue();
-});

www/tests/Unit/FileSizeTest.php

@@ -0,0 +1,32 @@
+<?php
+
+use App\Helpers\FileSize;
+
+test('formats zero bytes as "0"', function () {
+    expect(FileSize::format(0))->toBe('0');
+});
+
+test('formats byte values without decimal places', function () {
+    expect(FileSize::format(1))->toBe('1');
+    expect(FileSize::format(512))->toBe('512');
+    expect(FileSize::format(1001))->toBe('1001');
+    expect(FileSize::format(1023))->toBe('1023');
+});
+
+test('formats kilobytes', function () {
+    expect(FileSize::format(1024))->toBe('1.00K');
+    expect(FileSize::format(1536))->toBe('1.50K');
+});
+
+test('formats megabytes', function () {
+    expect(FileSize::format(1024 * 1024))->toBe('1.00M');
+    expect(FileSize::format((int) (1.5 * 1024 * 1024)))->toBe('1.50M');
+});
+
+test('formats gigabytes', function () {
+    expect(FileSize::format(1024 * 1024 * 1024))->toBe('1.00G');
+});
+
+test('formats terabytes', function () {
+    expect(FileSize::format(1024 * 1024 * 1024 * 1024))->toBe('1.00T');
+});

www/tests/Unit/NintendoFileExtensionTest.php

@@ -0,0 +1,29 @@
+<?php
+
+use App\Enums\NintendoFileExtension;
+
+test('values() returns all four supported extensions', function () {
+    expect(NintendoFileExtension::values())->toBe(['nsp', 'nsz', 'xci', 'xcz']);
+});
+
+test('isSupported() returns true for each supported extension', function (string $filename) {
+    expect(NintendoFileExtension::isSupported($filename))->toBeTrue();
+})->with(['game.nsp', 'game.nsz', 'game.xci', 'game.xcz']);
+
+test('isSupported() is case-insensitive', function (string $filename) {
+    expect(NintendoFileExtension::isSupported($filename))->toBeTrue();
+})->with(['game.NSP', 'game.NSZ', 'game.XCI', 'game.XCZ', 'game.Nsp', 'game.Xci']);
+
+test('isSupported() returns false for unsupported extensions', function (string $filename) {
+    expect(NintendoFileExtension::isSupported($filename))->toBeFalse();
+})->with(['game.txt', 'game.exe', 'game.zip', 'game.iso', 'game.php', 'game.rom']);
+
+test('isSupported() returns false for files without an extension', function () {
+    expect(NintendoFileExtension::isSupported('gamefile'))->toBeFalse();
+});
+
+test('isSupported() works with paths containing directory separators', function () {
+    expect(NintendoFileExtension::isSupported('folder/game.nsp'))->toBeTrue();
+    expect(NintendoFileExtension::isSupported('folder/sub/game.xci'))->toBeTrue();
+    expect(NintendoFileExtension::isSupported('folder/game.txt'))->toBeFalse();
+});