assertEqualsSame(expected, in, anyOf("-#").trimAndCollapseFrom(in, replacement));
      assertEqualsSame(expected, in, anyOf("-#123").trimAndCollapseFrom(in, replacement));
    }
  }

  public void testReplaceFrom() {
    assertThat(is('a').replaceFrom("yaha", 'o')).isEqualTo("yoho");
    assertThat(is('a').replaceFrom("yaha", "")).isEqualTo("yh");
    assertThat(is('a').replaceFrom("yaha", "o")).isEqualTo("yoho");