executor.execute(runnable);
          }
        };
    future.setFuture(badFuture);
    ExecutionException expected = getExpectingExecutionException(future);
    assertThat(expected).hasCauseThat().isInstanceOf(IllegalArgumentException.class);
    assertThat(expected).hasCauseThat().hasMessageThat().contains(badFuture.toString());
  }

  public void testSetFuture_misbehavingFutureDoesNotThrow() throws Exception {

      expected.put(key, -i);
    }
    ImmutableMap<ClassWithTerribleHashCode, Integer> map = builder.buildKeepingLast();
    assertThat(map).containsExactlyEntriesIn(expected).inOrder();
    assertThat(map).isInstanceOf(JdkBackedImmutableMap.class);
  }

  @GwtIncompatible // Pattern, Matcher
  public void testBuilder_keepingLast_thenOrThrow() {
    ImmutableMap.Builder<String, Integer> builder =

            executor.execute(runnable);
          }
        };
    future.setFuture(badFuture);
    ExecutionException expected = getExpectingExecutionException(future);
    assertThat(expected).hasCauseThat().isInstanceOf(IllegalArgumentException.class);
    assertThat(expected).hasCauseThat().hasMessageThat().contains(badFuture.toString());
  }

  public void testSetFuture_misbehavingFutureDoesNotThrow() throws Exception {

import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isGreaterThanOrEqualTo
import assertk.assertions.isIn
import assertk.assertions.isInstanceOf
import assertk.assertions.isLessThan
import assertk.assertions.isNotEmpty
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.fail
import java.io.File
import java.io.IOException