assertThat(Chars.ensureCapacity(ARRAY1, 1, 1)).isSameInstanceAs(ARRAY1);
    assertThat(Chars.ensureCapacity(ARRAY1, 2, 1))
        .isEqualTo(new char[] {(char) 1, (char) 0, (char) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Chars.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Chars.ensureCapacity(ARRAY1, 1, -1));
  }

    assertThat(Arrays.equals(new double[] {1.0, 0.0, 0.0}, Doubles.ensureCapacity(ARRAY1, 2, 1)))
        .isTrue();
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Doubles.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Doubles.ensureCapacity(ARRAY1, 1, -1));
  }

    assertThat(Ints.ensureCapacity(ARRAY1, 1, 1)).isSameInstanceAs(ARRAY1);
    assertThat(Ints.ensureCapacity(ARRAY1, 2, 1)).isEqualTo(new int[] {(int) 1, (int) 0, (int) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Ints.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Ints.ensureCapacity(ARRAY1, 1, -1));
  }

    assertThat(Booleans.ensureCapacity(new boolean[] {true}, 2, 1))
        .isEqualTo(new boolean[] {true, false, false});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Booleans.ensureCapacity(ARRAY_FALSE, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Booleans.ensureCapacity(ARRAY_FALSE, 1, -1));
  }

    assertThat(Shorts.ensureCapacity(ARRAY1, 2, 1))
        .isEqualTo(new short[] {(short) 1, (short) 0, (short) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Shorts.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Shorts.ensureCapacity(ARRAY1, 1, -1));
  }