mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-06-29 02:25:23 +00:00
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package d2vector
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import (
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"math"
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"math/rand"
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"testing"
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)
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func TestNewPosition(t *testing.T) {
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const maxXY = 1000
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x, y := rand.Intn(maxXY), rand.Intn(maxXY) // nolint:gosec // just a test
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locX, locY := float64(x), float64(y)
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pos := NewPosition(locX, locY)
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// old coordinate values Position equivalent
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locationX := locX // .SubWord().X()
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locationY := locY // .SubWord().Y()
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tileX := float64(x / 5) // .Tile().X()
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tileY := float64(y / 5) // .Tile().Y()
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subcellX := 1 + math.Mod(locX, 5) // .RenderOffset().X()
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subcellY := 1 + math.Mod(locY, 5) // .RenderOffset().Y()
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want := NewVector(tileX, tileY)
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got := pos.Tile()
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if !got.Equals(want) {
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t.Errorf("world position should match old value: got %s: want %s", got, want)
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}
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want = NewVector(subcellX, subcellY)
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got = pos.RenderOffset()
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if !got.Equals(want) {
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t.Errorf("render offset position should match old value: got %s: want %s", got, want)
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}
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want = NewVector(locationX, locationY)
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got = &pos.Vector
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if !got.Equals(want) {
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t.Errorf("sub tile position should match old value: got %s: want %s", got, want)
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}
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}
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func validate(description string, t *testing.T, original, got, want, unchanged Vector) {
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if !got.EqualsApprox(&want) {
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t.Errorf("%s: want %s: got %s", description, want, got)
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}
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if !original.EqualsApprox(&unchanged) {
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t.Errorf("Position value %s was incorrectly changed to %s when calling this method", unchanged, original)
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}
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}
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func TestPosition_World(t *testing.T) {
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p := NewPosition(5, 10)
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unchanged := p.Clone()
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got := p.World()
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want := NewVector(1, 2)
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validate("world position", t, p.Vector, *got, *want, *unchanged)
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}
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func TestPosition_Tile(t *testing.T) {
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p := NewPosition(23, 24)
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unchanged := p.Clone()
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got := p.Tile()
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want := NewVector(4, 4)
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validate("tile position", t, p.Vector, *got, *want, *unchanged)
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}
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func TestPosition_RenderOffset(t *testing.T) {
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p := NewPosition(12.1, 14.2)
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unchanged := p.Clone()
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got := p.RenderOffset()
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want := NewVector(3.1, 5.2)
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validate("offset from sub tile", t, p.Vector, *got, *want, *unchanged)
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}
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