58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
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package geo
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import (
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"testing"
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)
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func TestPointDistanceTo(t *testing.T) {
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p1 := &Point{0, 0}
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p2 := &Point{100, 0}
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p := &Point{50, 70}
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d := p.DistanceToLine(p1, p2)
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if d != 70.0 {
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t.Fatalf("Expected 70.0 and got %v", d)
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}
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}
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func TestAddVector(t *testing.T) {
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start := &Point{1.5, 5.3}
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c := NewVector(-3.5, -2.3)
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p2 := start.AddVector(c)
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if p2.X != -2 || p2.Y != 3 {
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t.Fatalf("Expected resulting point to be (-2, 3), got %+v", p2)
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}
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}
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func TestToVector(t *testing.T) {
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p := &Point{3.5, 6.7}
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v := p.toVector()
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if v[0] != p.X || v[1] != p.Y {
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t.Fatalf("Expected Vector (%v) coordinates to match the point (%v)", p, v)
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}
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if len(v) != 2 {
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t.Fatal("Expected the Vector to have 2 components")
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}
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}
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func TestVectorTo(t *testing.T) {
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p1 := &Point{1.5, 5.3}
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p2 := &Point{-2, 3}
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c := p1.VectorTo(p2)
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if !c.equals(NewVector(-3.5, -2.3)) {
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t.Fatalf("Expected Vector to be (-3.5, -2.3), got %v", c)
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}
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p1 = &Point{1.5, 5.3}
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p2 = &Point{-2, 3}
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c = p2.VectorTo(p1)
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if !c.equals(NewVector(3.5, 2.3)) {
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t.Fatalf("Expected Vector to be (3.5, 2.3), got %v", c)
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}
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}
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