go-by-test/shapes/shapes_test.go

package shapes

import "testing"

func TestPerimeter(t *testing.T) {
	rectangle := Rectangle{30.5, 20.5}
	got := rectangle.Perimeter()
	exp := 102.0

	if got != exp {
		t.Errorf("got %.2f expected %.2f", got, exp)
	}
}

func TestArea(t *testing.T) {
	areaTests := []struct {
		shape Shape
		exp   float64
	}{
		{Rectangle{30.5, 20.5}, 625.25},
		{Circle{10}, 314.1592653589793},
		{Triangle{12, 6}, 36.0},
	}

	for _, test := range areaTests {
		got := test.shape.Area()
		if got != test.exp {
			t.Errorf("got %.2f expected %.2f", got, test.exp)
		}
	}
}