Ilia Denisov
145 lines
3.8 KiB
Go
145 lines
3.8 KiB
Go
package world
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestPlanIncrementalPan_NoOp(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 50, 30, 0, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalNoOp, plan.Mode)
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require.Empty(t, plan.Dirty)
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}
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func TestPlanIncrementalPan_FullRedrawOnInvalidCanvas(t *testing.T) {
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t.Parallel()
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_, err := PlanIncrementalPan(0, 100, 10, 10, 1, 0)
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require.ErrorIs(t, err, errInvalidCanvasSize)
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}
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func TestPlanIncrementalPan_FullRedrawOnTooLargeShift(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(100, 80, 40, 40, 100, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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plan, err = PlanIncrementalPan(100, 80, 40, 40, 0, -80)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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}
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func TestPlanIncrementalPan_FullRedrawWhenMarginIsZeroAndDeltaNonZero(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(100, 80, 0, 20, 1, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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plan, err = PlanIncrementalPan(100, 80, 20, 0, 0, 1)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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}
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func TestPlanIncrementalPan_FullRedrawWhenExceedsThresholdX(t *testing.T) {
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t.Parallel()
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// marginX=20 => threshold=10, dx=11 => full redraw
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plan, err := PlanIncrementalPan(200, 100, 20, 20, 11, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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}
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func TestPlanIncrementalPan_FullRedrawWhenExceedsThresholdY(t *testing.T) {
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t.Parallel()
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// marginY=20 => threshold=10, dy=-11 => full redraw
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plan, err := PlanIncrementalPan(200, 100, 20, 20, 0, -11)
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require.NoError(t, err)
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require.Equal(t, IncrementalFullRedraw, plan.Mode)
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}
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func TestPlanIncrementalPan_Shift_LeftStripWhenDxPositive(t *testing.T) {
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t.Parallel()
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// marginX=40 => threshold=20, dx=5 => shift ok
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plan, err := PlanIncrementalPan(200, 100, 40, 40, 5, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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require.Equal(t, 5, plan.DxPx)
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require.Equal(t, 0, plan.DyPx)
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require.Equal(t, []RectPx{
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{X: 0, Y: 0, W: 6, H: 100},
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}, plan.Dirty)
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}
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func TestPlanIncrementalPan_Shift_RightStripWhenDxNegative(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 40, 40, -7, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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require.Equal(t, []RectPx{
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{X: 200 - 8, Y: 0, W: 8, H: 100},
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}, plan.Dirty)
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}
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func TestPlanIncrementalPan_Shift_TopStripWhenDyPositive(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 40, 40, 0, 9)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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require.Equal(t, []RectPx{
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{X: 0, Y: 0, W: 200, H: 10},
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}, plan.Dirty)
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}
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func TestPlanIncrementalPan_Shift_BottomStripWhenDyNegative(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 40, 40, 0, -9)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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require.Equal(t, []RectPx{
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{X: 0, Y: 100 - 10, W: 200, H: 10},
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}, plan.Dirty)
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}
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func TestPlanIncrementalPan_Shift_DiagonalReturnsTwoDirtyRects(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 40, 40, -6, 8)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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// Overlap is allowed; we just require both strips exist.
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require.Len(t, plan.Dirty, 2)
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require.ElementsMatch(t, []RectPx{
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{X: 200 - 7, Y: 0, W: 7, H: 100}, // right strip
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{X: 0, Y: 0, W: 200, H: 9}, // top strip
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}, plan.Dirty)
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}
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func TestPlanIncrementalPan_OverdrawsDirtyStripsByOnePixel(t *testing.T) {
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t.Parallel()
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plan, err := PlanIncrementalPan(200, 100, 40, 40, -7, 0)
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require.NoError(t, err)
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require.Equal(t, IncrementalShift, plan.Mode)
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// Right strip width should be abs(dx)+1 = 8.
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require.Equal(t, []RectPx{
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{X: 200 - 8, Y: 0, W: 8, H: 100},
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}, plan.Dirty)
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}
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