limit amount of items in calendar drag and drop boxes (#2291)

tests/DependencyInjection/AppExtensionTest.php

@@ -130,7 +130,8 @@ class AppExtensionTest extends TestCase
                     'api_key' => null,
                     'sources' => [],
                 ],
-                'weekends' => true
+                'weekends' => true,
+                'dragdrop_amount' => 10,
             ],
             'kimai.dashboard' => [],
             'kimai.widgets' => [],

tests/DependencyInjection/ConfigurationTest.php

@@ -128,6 +128,19 @@ class ConfigurationTest extends TestCase
         $this->assertConfig($config, []);
     }
 
+    public function testValidateCalendarDragDropMaxEntries()
+    {
+        $this->expectException(InvalidConfigurationException::class);
+        $this->expectExceptionMessage('Invalid configuration for path "kimai.calendar.dragdrop_amount": The dragdrop_amount must be between 0 and 20');
+
+        $config = $this->getMinConfig();
+        $config['calendar'] = [
+            'dragdrop_amount' => 50,
+        ];
+
+        $this->assertConfig($config, []);
+    }
+
     public function testValidateLdapFilterInvalidParenthesisCounter()
     {
         $this->expectException(InvalidConfigurationException::class);
@@ -346,6 +359,7 @@ class ConfigurationTest extends TestCase
                     ],
                 ],
                 'weekends' => true,
+                'dragdrop_amount' => 10,
             ],
             'theme' => [
                 'active_warning' => 3,

tests/Event/CalendarDragAndDropSourceEventTest.php

@@ -24,7 +24,7 @@ class CalendarDragAndDropSourceEventTest extends TestCase
         $user = new User();
         $user->setAlias('foo');
 
-        $sut = new CalendarDragAndDropSourceEvent($user);
+        $sut = new CalendarDragAndDropSourceEvent($user, 10);
 
         $hello = new TestDragAndDropSource('hello');
         $tmp1 = new TestDragAndDropSource('foo');
@@ -40,6 +40,7 @@ class CalendarDragAndDropSourceEventTest extends TestCase
         self::assertInstanceOf(CalendarDragAndDropSourceEvent::class, $sut->addSource($tmp3));
         self::assertCount(4, $sut->getSources());
         self::assertEquals([$tmp1, $tmp2, $hello, $tmp3], $sut->getSources());
+        self::assertEquals(10, $sut->getMaxEntries());
 
         self::assertFalse($sut->removeSource(new TestDragAndDropSource('foo')));
         self::assertTrue($sut->removeSource($hello));