rect/line_test.go

50 lines
1.2 KiB
Go

package rect
import "testing"
func TestOnLine(t *testing.T) {
var onLineTest = []struct {
p []Point
expected bool
}{
{[]Point{{1, 1}, {3, 3}, {2, 2}}, true},
{[]Point{{1, 1}, {3, 3}, {4, 4}}, false},
{[]Point{{-1, -1}, {-3, -3}, {-4, -4}}, false},
{[]Point{{-1, -1}, {-3, -3}, {-2, -2}}, true},
}
for _, rt := range onLineTest {
actual := onLine(rt.p[0], rt.p[1], rt.p[2])
if actual != rt.expected {
t.Errorf(
"failed onLine:\n\texpected: %t\n\t actual: %t",
rt.expected,
actual,
)
}
}
}
func TestLineIntersection(t *testing.T) {
var lineIntersectionTest = []struct {
l []line
expected Point
}{
{[]line{{Point{0, 0}, Point{2, 2}}, {Point{2, 0}, Point{0, 2}}}, Point{1, 1}},
{[]line{{Point{0, 0}, Point{-2, -2}}, {Point{-2, 0}, Point{0, -2}}}, Point{-1, -1}},
{[]line{{Point{0, 0}, Point{-2, -2}}, {Point{1, 0}, Point{1, -7}}}, Point{0, 0}},
{[]line{{Point{5, 8}, Point{8, 5}}, {Point{3, 7}, Point{7, 3}}}, Point{0, 0}},
}
for _, rt := range lineIntersectionTest {
actual, _ := lineIntersection(rt.l[0], rt.l[1])
if actual != rt.expected {
t.Errorf(
"failed lineIntersection:\n\texpected: %v\n\t actual: %v",
rt.expected,
actual,
)
}
}
}