Add a new test for the update check (#96)

tests/Unit/Helper/UpdateCheckTest.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace Tests\Unit\Helper;
+
+use App\Helper\UpdateHelper;
+use Illuminate\Support\Facades\Http;
+use Tests\TestCase;
+
+/**
+ * Class UpdateCheckTest
+ *
+ * @package Tests\Unit\Helper
+ */
+class UpdateCheckTest extends TestCase
+{
+    /**
+     * Test the checkForUpdates() helper function with a new update available.
+     * Must return the given version string.
+     *
+     * @return void
+     */
+    public function testSuccessfulCheck(): void
+    {
+        Http::fake([
+            'github.com/*' => Http::response(
+                [['tag_name' => 'v100.0.0']],
+                200
+            ),
+        ]);
+
+        $result = UpdateHelper::checkForUpdates();
+
+        $this->assertEquals('v100.0.0', $result);
+    }
+
+    /**
+     * Test the checkForUpdates() helper function with no update available.
+     * Must return true.
+     *
+     * @return void
+     */
+    public function testSuccessfulCheckWithoutVersion(): void
+    {
+        Http::fake([
+            'github.com/*' => Http::response(
+                [['tag_name' => 'v0.0.0']],
+                200
+            ),
+        ]);
+
+        $result = UpdateHelper::checkForUpdates();
+
+        $this->assertTrue($result);
+    }
+
+    /**
+     * Test the checkForUpdates() helper function, but trigger a network / http error.
+     * Must return false.
+     *
+     * @return void
+     */
+    public function testValidWaybackLink(): void
+    {
+        Http::fake([
+            'github.com/*' => Http::response([], 404),
+        ]);
+
+        $result = UpdateHelper::checkForUpdates();
+
+        $this->assertFalse($result);
+    }
+}