Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3641#discussion_r108720517
--- Diff: flink-libraries/flink-table/pom.xml ---
@@ -140,6 +140,20 @@ under the License.
<version>${project.version}</version>
<scope>test</scope>
</dependency>
+ <dependency>
+ <groupId>org.apache.flink</groupId>
+ <artifactId>flink-streaming-java_2.10</artifactId>
+ <version>${project.version}</version>
+ <type>test-jar</type>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.flink</groupId>
+ <artifactId>flink-runtime_2.10</artifactId>
+ <version>${project.version}</version>
+ <scope>test</scope>
+ <type>test-jar</type>
+ </dependency>
--- End diff --
Yes, the dependency is required for the test harness class which allows to
control processing time. This is needed to properly test processing time
operators that have a semantic that depends on the time (so not only sorting by
time which is implicitly true for processing time). The processing time OVER
RANGE window groups data by processing time. If we want to test this without
manual timing (which is not good unit test practice) we need the test harness.
There will be more operators in the future that require this dependency.
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