Function TestMatrixDeterminant

math/matrix/determinant_test.go:13–46

Test different matrix contents

(t *testing.T)

// Test different matrix contents
func TestMatrixDeterminant(t *testing.T) {
	// Find Determinant of a 2 by 2 matrix.
	matrix1, err := matrix.NewFromElements([][]int{
		{3, 8},
		{4, 6},
	})
	if err != nil {
		t.Fatalf("Error creating 3 by 3 matrix: %v", err)
	}
	determinant, err := matrix1.Determinant()
	if err != nil {
		t.Fatalf("Error returned from 3 by 3 matrix: %v", err)
	}
	if determinant != -14 {
		t.Fatalf("Determinant returned for a 3 by 3 matrix was %d; wanted -14", determinant)
	}

	// Find Dertminant of a 1 by 1 matrix
	expectedValue := rand.Intn(math.MaxInt)
	matrix2, err := matrix.NewFromElements([][]int{
		{expectedValue},
	})
	if err != nil {
		t.Fatalf("Error creating 1 by 1 matrix: %v", err)
	}
	determinant, err = matrix2.Determinant()
	if err != nil {
		t.Fatalf("Error returned from 1 by 1 matrix: %v", err)
	}
	if determinant != expectedValue {
		t.Fatalf("Determinant returned for a 1 by 1 matrix was %d; wanted %d", determinant, expectedValue)
	}

}

func TestEmptyMatrix(t *testing.T) {
	emptyElements := [][]int{}