Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/6415#discussion_r205108213
--- Diff:
flink-end-to-end-tests/flink-dataset-allround-test/src/main/java/org/apache/flink/batch/tests/Generator.java
---
@@ -0,0 +1,147 @@
+/*
+ * 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.batch.tests;
+
+import org.apache.flink.api.common.io.DefaultInputSplitAssigner;
+import org.apache.flink.api.common.io.InputFormat;
+import org.apache.flink.api.common.io.statistics.BaseStatistics;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.core.io.GenericInputSplit;
+import org.apache.flink.core.io.InputSplitAssigner;
+import org.apache.flink.util.Preconditions;
+
+import java.io.IOException;
+
+/**
+ * InputFormat that generates a deterministic DataSet of Tuple2(String,
Integer)
+ * <ul>
+ * <li>String: key, can be repeated.</li>
+ * <li>Integer: uniformly distributed int between 0 and 127</li>
+ * </ul>
+ *
+ * <p>If control path was provided, as long as this file is empty dummy
elements with value equal to -1 will be emitted.
--- End diff --
outdated
---
