IllegalArgumentException.class,
            () -> checkArgument(false, "A %s C %s E", "b", "d", "f"));
    assertThat(e).hasMessageThat().isEqualTo("A b C d E [f]");
  }

  public void testCheckArgument_singleNullArg_failure() {
    IllegalArgumentException e =
        assertThrows(
            IllegalArgumentException.class, () -> checkArgument(false, "A %s C", (Object) null));