Add clear() for fields and field group (#14755)

Change-Id: If9372ccceeaacd0826f8b1ed07f64af12bf47fc6

1 files changed, 78 insertions, 0 deletions

diff --git a/server/tests/src/com/vaadin/ui/TableTest.java b/server/tests/src/com/vaadin/ui/TableTest.java
new file mode 100644
index 0000000000..86237abbe0
--- /dev/null
+++ b/server/tests/src/com/vaadin/ui/TableTest.java
@@ -0,0 +1,78 @@
+/*
+ * 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 java.util.Collection;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.vaadin.data.util.BeanItemContainerGenerator;
+
+public class TableTest {
+
+    Table table;
+
+    @Before
+    public void init() {
+        table = new Table();
+    }
+
+    @Test
+    public void initiallyEmpty() {
+        Assert.assertTrue(table.isEmpty());
+    }
+
+    @Test
+    public void emptyAfterClearSingleSelect() {
+        table.setContainerDataSource(BeanItemContainerGenerator
+                .createContainer(100));
+        Assert.assertTrue(table.isEmpty());
+        Object first = table.getContainerDataSource().getItemIds().iterator()
+                .next();
+        table.setValue(first);
+        Assert.assertEquals(first, table.getValue());
+        Assert.assertFalse(table.isEmpty());
+        table.clear();
+        Assert.assertEquals(null, table.getValue());
+        Assert.assertTrue(table.isEmpty());
+    }
+
+    @Test
+    public void emptyAfterClearMultiSelect() {
+        table.setMultiSelect(true);
+        table.setContainerDataSource(BeanItemContainerGenerator
+                .createContainer(100));
+
+        Assert.assertTrue(table.isEmpty());
+        Assert.assertArrayEquals(new Object[] {},
+                ((Collection) table.getValue()).toArray());
+
+        Object first = table.getContainerDataSource().getItemIds().iterator()
+                .next();
+        table.select(first);
+        Assert.assertArrayEquals(new Object[] { first },
+                ((Collection) table.getValue()).toArray());
+        Assert.assertFalse(table.isEmpty());
+
+        table.clear();
+        Assert.assertArrayEquals(new Object[] {},
+                ((Collection) table.getValue()).toArray());
+        Assert.assertTrue(table.isEmpty());
+    }
+
+}