MCordingley\LinearAlgebraTest\MatrixTest::testSubtractMatrixWrongSizes PHP Method

    public function testSubtractMatrixWrongSizes()
    {
        $matrix1 = $this->buildMatrix();
        $matrix2 = new Matrix([[4, 2, 6], [1, 7, 3], [7, 3, 2]]);
        static::expectException(MatrixException::class);
        $matrix1->subtractMatrix($matrix2);
    }