### Question:
LUDecompositionCommonsResult implements LUDecompositionResult { @Override public int[] getPivot() { return _pivot; } LUDecompositionCommonsResult(LUDecomposition lu); @Override double getDeterminant(); @Override DoubleMatrix getL(); @Override DoubleMatrix getP(); @Override int[] getPivot(); @Override DoubleMatrix getU(); @Override DoubleArray solve(DoubleArray b); @Override double[] solve(double[] b); @Override DoubleMatrix solve(DoubleMatrix b);  }### Answer:
@Test public void testGetPivot() { int[] expectedRaw = new int[] {0, 1, 2, 3}; assertThat(Arrays.equals(RESULT.getPivot(), expectedRaw)).isTrue(); }