[jira] [Created] (FLINK-7273) Gelly tests with empty graphs

[Shang Yuanchun (Jira)]

Greg Hogan created FLINK-7273:
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             Summary: Gelly tests with empty graphs
                 Key: FLINK-7273
                 URL: https://issues.apache.org/jira/browse/FLINK-7273
             Project: Flink
          Issue Type: Bug
          Components: Gelly
    Affects Versions: 1.4.0
            Reporter: Greg Hogan
            Assignee: Greg Hogan
            Priority: Minor
             Fix For: 1.4.0


There exist some tests with empty graphs but the `EmptyGraph` in `AsmTestBase` contained vertices but no edges. Add a new `EmptyGraph` without vertices and test both empty graphs for each algorithm.

`PageRank` should (optionally?) include zero-degree vertices in the results.



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