Add public Field.isEmpty() and clear() (#15354)

Change-Id: I6bda7ff2a66a9ad172c899d855ca868881600be4

1 files changed, 47 insertions, 0 deletions

diff --git a/server/tests/src/com/vaadin/ui/TextAreaTest.java b/server/tests/src/com/vaadin/ui/TextAreaTest.java
new file mode 100644
index 0000000000..e7e99c19e9
--- /dev/null
+++ b/server/tests/src/com/vaadin/ui/TextAreaTest.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2000-2014 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.ui;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.vaadin.data.util.ObjectProperty;
+
+public class TextAreaTest {
+    @Test
+    public void initiallyEmpty() {
+        TextArea tf = new TextArea();
+        Assert.assertTrue(tf.isEmpty());
+    }
+
+    @Test
+    public void emptyAfterClearUsingPDS() {
+        TextArea tf = new TextArea(new ObjectProperty<String>("foo"));
+        Assert.assertFalse(tf.isEmpty());
+        tf.clear();
+        Assert.assertTrue(tf.isEmpty());
+    }
+
+    @Test
+    public void emptyAfterClear() {
+        TextArea tf = new TextArea();
+        tf.setValue("foobar");
+        Assert.assertFalse(tf.isEmpty());
+        tf.clear();
+        Assert.assertTrue(tf.isEmpty());
+    }
+
+}