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https://issues.apache.org/jira/browse/FLINK-6162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15947056#comment-15947056
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ASF GitHub Bot commented on FLINK-6162:
---------------------------------------
Github user greghogan commented on a diff in the pull request:
https://github.com/apache/flink/pull/3595#discussion_r108438856
--- Diff:
flink-core/src/test/java/org/apache/flink/core/memory/ByteArrayInputStreamWithPosTest.java
---
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.flink.core.memory;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ByteArrayInputStreamWithPosTest {
+
+ /**
+ * This tests setting position on a {@link ByteArrayInputStreamWithPos}
+ */
+ @Test
+ public void testSetPosition() throws Exception {
+ byte[] data = new byte[]
{'0','1','2','3','4','5','6','7','8','9'};
+ ByteArrayInputStreamWithPos inputStreamWithPos = new
ByteArrayInputStreamWithPos(data);
+ inputStreamWithPos.setPosition(1);
+ Assert.assertEquals('1', inputStreamWithPos.read());
+ inputStreamWithPos.setPosition(3);
+ Assert.assertEquals('3', inputStreamWithPos.read());
+ }
+
+ /**
+ * This tests that the expected position exceeds the capacity of the
byte array.
+ */
+ @Test(expected = IllegalArgumentException.class)
--- End diff --
I think the preference is to instead use `ExpectedException` which can also
take an expected message.
> Fix bug in ByteArrayOutputStreamWithPos#setPosition
> ---------------------------------------------------
>
> Key: FLINK-6162
> URL: https://issues.apache.org/jira/browse/FLINK-6162
> Project: Flink
> Issue Type: Bug
> Components: Core
> Reporter: Wenlong Lyu
> Assignee: Wenlong Lyu
>
> Currently the precondition check in setPosition will fail when the buffer is
> full:
> {{Preconditions.checkArgument(position < getEndPosition(), "Position out of
> bounds.");}}
> We should allow the expected position to be the end position
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