"Expiration": "2019-02-20T19:56:59-08:00",
        "AccessKeyId": "K9DTIMUVZXEXJL3ATUOY"
    }
}
```

### Testing an example with `assume-role.go`

The included program in this directory can also be used for testing:

``` shell
$ go run assume-role.go -u foobar -p foo12345 -d
Only displaying credentials:
AccessKeyID: 27YDRYEM0S9B44AJJX9X
SecretAccessKey: LHPdHeaLiYk+pDZ3hgN3sdwXpJC2qbhBfZ8ii9Z3

Harshavardhana <******@****.***> 1723857894 -0700

                long newTime = f.createTime();
                if ( newTime == orig ) {
                    Assume.assumeTrue("Create time was not changed", false);
                }
                assertEquals(time, newTime);
            }
            catch ( SmbUnsupportedOperationException e ) {
                Assume.assumeTrue("No Ntsmbs", false);
            }
            finally {
                f.delete();

        String testDomain = getProperties().get(TestProperties.TEST_DOMAIN);
        Assume.assumeNotNull(testDomain);
        return testDomain;
    }


    protected String getTestServer () {
        String testServer = getProperties().get(TestProperties.TEST_SERVER);
        Assume.assumeNotNull(testServer);
        return testServer;
    }


    protected String getTestUserDomain () {

    assertThat(e.getMessage()).contains(ERROR_REUSE_EDGE);
  }

  @Test
  public void addEdge_parallelSelfLoopEdge_notAllowed() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(network.allowsSelfLoops()).isTrue();
    assume().that(network.allowsParallelEdges()).isFalse();

    addEdge(N1, N1, E11);
    IllegalArgumentException e =
        assertThrows(

    assertThat(e.getMessage()).contains(ERROR_REUSE_EDGE);
  }

  @Test
  public void addEdge_parallelSelfLoopEdge_notAllowed() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(network.allowsSelfLoops()).isTrue();
    assume().that(network.allowsParallelEdges()).isFalse();

    addEdge(N1, N1, E11);
    IllegalArgumentException e =
        assertThrows(

  public void putEdge_doesntAllowSelfLoops() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(graph.allowsSelfLoops()).isFalse();

    IllegalArgumentException e =
        assertThrows(IllegalArgumentException.class, () -> putEdge(N1, N1));
    assertThat(e).hasMessageThat().contains(ERROR_SELF_LOOP);
  }

  @Test
  public void putEdge_allowsSelfLoops() {
    assume().that(graphIsMutable()).isTrue();

  public void putEdge_doesntAllowSelfLoops() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(graph.allowsSelfLoops()).isFalse();

    IllegalArgumentException e =
        assertThrows(IllegalArgumentException.class, () -> putEdge(N1, N1));
    assertThat(e).hasMessageThat().contains(ERROR_SELF_LOOP);
  }

  @Test
  public void putEdge_allowsSelfLoops() {
    assume().that(graphIsMutable()).isTrue();

    assertThat(e).hasMessageThat().contains(ERROR_REUSE_EDGE);
  }

  @Test
  public void addEdge_parallelSelfLoopEdge_notAllowed() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(network.allowsSelfLoops()).isTrue();
    assume().that(network.allowsParallelEdges()).isFalse();

    addEdge(N1, N1, E11);
    IllegalArgumentException e =
        assertThrows(

    assertThat(e).hasMessageThat().contains(ERROR_REUSE_EDGE);
  }

  @Test
  public void addEdge_parallelSelfLoopEdge_notAllowed() {
    assume().that(graphIsMutable()).isTrue();
    assume().that(network.allowsSelfLoops()).isTrue();
    assume().that(network.allowsParallelEdges()).isFalse();

    addEdge(N1, N1, E11);
    IllegalArgumentException e =
        assertThrows(