67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
package chart
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import (
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"fmt"
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"testing"
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assert "github.com/blendlabs/go-assert"
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)
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func TestBox2dCenter(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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BottomRight: Point{15, 15},
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BottomLeft: Point{5, 15},
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}
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cx, cy := bc.Center()
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assert.Equal(10, cx)
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assert.Equal(10, cy)
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}
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func TestBox2dRotate(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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BottomRight: Point{15, 15},
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BottomLeft: Point{5, 15},
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}
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rotated := bc.Rotate(45)
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assert.True(rotated.TopLeft.Equals(Point{10, 3}), rotated.String())
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}
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func TestBox2dOverlaps(t *testing.T) {
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assert := assert.New(t)
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bc := Box2d{
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TopLeft: Point{5, 5},
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TopRight: Point{15, 5},
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BottomRight: Point{15, 15},
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BottomLeft: Point{5, 15},
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}
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// shift meaningfully the full width of bc right.
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bc2 := bc.Shift(bc.Width()+1, 0)
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assert.False(bc.Overlaps(bc2), fmt.Sprintf("%v\n\t\tshould not overlap\n\t%v", bc, bc2))
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// shift meaningfully the full height of bc down.
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bc3 := bc.Shift(0, bc.Height()+1)
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assert.False(bc.Overlaps(bc3), fmt.Sprintf("%v\n\t\tshould not overlap\n\t%v", bc, bc3))
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bc4 := bc.Shift(5, 0)
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assert.True(bc.Overlaps(bc4))
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bc5 := bc.Shift(0, 5)
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assert.True(bc.Overlaps(bc5))
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bcr := bc.Rotate(45)
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bcr2 := bc.Rotate(45).Shift(bc.Width()/2.0, 0)
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assert.True(bcr.Overlaps(bcr2), fmt.Sprintf("%v\n\t\tshould overlap\n\t%v", bcr, bcr2))
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}
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