添加项目文件。

Fluent.Ribbon/Fluent.Ribbon.Tests/Internal/WhenLoadedTests.cs

@@ -0,0 +1,55 @@
+namespace Fluent.Tests.Internal
+{
+    using System.Windows.Controls;
+    using Fluent.Internal;
+    using Fluent.Tests.TestClasses;
+    using NUnit.Framework;
+
+    [TestFixture]
+    public class WhenLoadedTests
+    {
+        [Test]
+        public void Action_Should_Be_Called_When_Already_Loaded()
+        {
+            var control = new Control();
+
+            var loadedActionCallCount = 0;
+
+            using (new TestRibbonWindow(control))
+            {
+                control.WhenLoaded(x => ++loadedActionCallCount);
+
+                Assert.That(loadedActionCallCount, Is.EqualTo(1));
+            }
+
+            // Check that only one loaded event triggers the action
+            using (new TestRibbonWindow(control))
+            {
+                Assert.That(loadedActionCallCount, Is.EqualTo(1));
+            }
+        }
+
+        [Test]
+        public void Action_Should_Be_Called_When_Loaded_Later()
+        {
+            var control = new Control();
+
+            var loadedActionCallCount = 0;
+
+            control.WhenLoaded(x => ++loadedActionCallCount);
+
+            Assert.That(loadedActionCallCount, Is.EqualTo(0));
+
+            using (new TestRibbonWindow(control))
+            {
+                Assert.That(loadedActionCallCount, Is.EqualTo(1));
+            }
+
+            // Check that only one loaded event triggers the action
+            using (new TestRibbonWindow(control))
+            {
+                Assert.That(loadedActionCallCount, Is.EqualTo(1));
+            }
+        }
+    }
+}