@Test
  public void testNullableFixedType() {
    // Build an optional uint field definition
    MajorType.Builder typeBuilder = MajorType.newBuilder();
    FieldDef.Builder defBuilder = FieldDef.newBuilder();
    typeBuilder.setMinorType(MinorType.UINT4).setMode(DataMode.OPTIONAL).setWidth(4);
    defBuilder.setMajorType(typeBuilder.build());
    MaterializedField field = MaterializedField.create(defBuilder.build());

    // Create a new value vector for 1024 integers
    NullableUInt4Vector v = new NullableUInt4Vector(field, allocator);
    NullableUInt4Vector.Mutator m = v.getMutator();
    v.allocateNew(1024);

    // Put and set a few values
    m.set(0, 100);
    m.set(1, 101);
    m.set(100, 102);
    m.set(1022, 103);
    m.set(1023, 104);
    assertEquals(100, v.getAccessor().get(0));
    assertEquals(101, v.getAccessor().get(1));
    assertEquals(102, v.getAccessor().get(100));
    assertEquals(103, v.getAccessor().get(1022));
    assertEquals(104, v.getAccessor().get(1023));

    // Ensure null values throw
    {
      boolean b = false;
      try {
        v.getAccessor().get(3);
      } catch (AssertionError e) {
        b = true;
      } finally {
        if (!b) {
          assert false;
        }
      }
    }

    v.allocateNew(2048);
    {
      boolean b = false;
      try {
        v.getAccessor().get(0);
      } catch (AssertionError e) {
        b = true;
      } finally {
        if (!b) {
          assert false;
        }
      }
    }

    m.set(0, 100);
    m.set(1, 101);
    m.set(100, 102);
    m.set(1022, 103);
    m.set(1023, 104);
    assertEquals(100, v.getAccessor().get(0));
    assertEquals(101, v.getAccessor().get(1));
    assertEquals(102, v.getAccessor().get(100));
    assertEquals(103, v.getAccessor().get(1022));
    assertEquals(104, v.getAccessor().get(1023));

    // Ensure null values throw

    {
      boolean b = false;
      try {
        v.getAccessor().get(3);
      } catch (AssertionError e) {
        b = true;
      } finally {
        if (!b) {
          assert false;
        }
      }
    }
  }
  @Test
  public void testNullableFixedType() {
    final MaterializedField field =
        MaterializedField.create(EMPTY_SCHEMA_PATH, NullableUInt4Holder.TYPE);

    // Create a new value vector for 1024 integers.
    try (final NullableUInt4Vector vector = new NullableUInt4Vector(field, allocator)) {
      final NullableUInt4Vector.Mutator m = vector.getMutator();
      vector.allocateNew(1024);

      // Put and set a few values
      m.set(0, 100);
      m.set(1, 101);
      m.set(100, 102);
      m.set(1022, 103);
      m.set(1023, 104);

      final NullableUInt4Vector.Accessor accessor = vector.getAccessor();
      assertEquals(100, accessor.get(0));
      assertEquals(101, accessor.get(1));
      assertEquals(102, accessor.get(100));
      assertEquals(103, accessor.get(1022));
      assertEquals(104, accessor.get(1023));

      // Ensure null values throw
      {
        boolean b = false;
        try {
          accessor.get(3);
        } catch (IllegalStateException e) {
          b = true;
        } finally {
          assertTrue(b);
        }
      }

      vector.allocateNew(2048);
      {
        boolean b = false;
        try {
          accessor.get(0);
        } catch (IllegalStateException e) {
          b = true;
        } finally {
          assertTrue(b);
        }
      }

      m.set(0, 100);
      m.set(1, 101);
      m.set(100, 102);
      m.set(1022, 103);
      m.set(1023, 104);
      assertEquals(100, accessor.get(0));
      assertEquals(101, accessor.get(1));
      assertEquals(102, accessor.get(100));
      assertEquals(103, accessor.get(1022));
      assertEquals(104, accessor.get(1023));

      // Ensure null values throw.
      {
        boolean b = false;
        try {
          vector.getAccessor().get(3);
        } catch (IllegalStateException e) {
          b = true;
        } finally {
          assertTrue(b);
        }
      }
    }
  }