if (pageLength == 0) {
// no paging: return all items
filteredSize = container.size();
+ assert filteredSize >= 0;
return new ArrayList<Object>(container.getItemIds());
}
}
filteredSize = container.size();
+ assert filteredSize >= 0;
currentPage = adjustCurrentPage(currentPage, needNullSelectOption,
indexToEnsureInView, filteredSize);
int first = getFirstItemIndexOnCurrentPage(needNullSelectOption,
--- /dev/null
+/*
+ * 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.data.util;
+
+import org.junit.Test;
+
+import com.vaadin.data.Container;
+import com.vaadin.ui.Table;
+
+public class ContainerSizeAssertTest {
+
+ @Test(expected = AssertionError.class)
+ public void testNegativeSizeAssert() {
+ Table table = createAttachedTable();
+
+ table.setContainerDataSource(createNegativeSizeContainer());
+ }
+
+ @Test
+ public void testZeroSizeNoAssert() {
+ Table table = createAttachedTable();
+
+ table.setContainerDataSource(new IndexedContainer());
+ }
+
+ private Container createNegativeSizeContainer() {
+ return new IndexedContainer() {
+ @Override
+ public int size() {
+ return -1;
+ }
+ };
+ }
+
+ private Table createAttachedTable() {
+ return new Table() {
+ private boolean initialized = true;
+
+ @Override
+ public boolean isAttached() {
+ // This returns false until the super constructor has finished
+ return initialized;
+ }
+ };
+ }
+}