go-chart/box_test.go

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package chart
import (
"math"
"testing"
"github.com/blendlabs/go-assert"
)
func TestBoxClone(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 5, Left: 5, Right: 15, Bottom: 15}
b := a.Clone()
assert.True(a.Equals(b))
assert.True(b.Equals(a))
}
func TestBoxEquals(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 5, Left: 5, Right: 15, Bottom: 15}
b := Box{Top: 10, Left: 10, Right: 30, Bottom: 30}
c := Box{Top: 5, Left: 5, Right: 15, Bottom: 15}
assert.True(a.Equals(a))
assert.True(a.Equals(c))
assert.True(c.Equals(a))
assert.False(a.Equals(b))
assert.False(c.Equals(b))
assert.False(b.Equals(a))
assert.False(b.Equals(c))
}
func TestBoxIsBiggerThan(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 5, Left: 5, Right: 25, Bottom: 25}
b := Box{Top: 10, Left: 10, Right: 20, Bottom: 20} // only half bigger
c := Box{Top: 1, Left: 1, Right: 30, Bottom: 30} //bigger
assert.True(a.IsBiggerThan(b))
assert.False(a.IsBiggerThan(c))
assert.True(c.IsBiggerThan(a))
}
func TestBoxIsSmallerThan(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 5, Left: 5, Right: 25, Bottom: 25}
b := Box{Top: 10, Left: 10, Right: 20, Bottom: 20} // only half bigger
c := Box{Top: 1, Left: 1, Right: 30, Bottom: 30} //bigger
assert.False(a.IsSmallerThan(b))
assert.True(a.IsSmallerThan(c))
assert.False(c.IsSmallerThan(a))
}
func TestBoxGrow(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 1, Left: 2, Right: 15, Bottom: 15}
b := Box{Top: 4, Left: 5, Right: 30, Bottom: 35}
c := a.Grow(b)
assert.False(c.Equals(b))
assert.False(c.Equals(a))
assert.Equal(1, c.Top)
assert.Equal(2, c.Left)
assert.Equal(30, c.Right)
assert.Equal(35, c.Bottom)
}
func TestBoxFit(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 64, Left: 64, Right: 192, Bottom: 192}
b := Box{Top: 16, Left: 16, Right: 256, Bottom: 170}
c := Box{Top: 16, Left: 16, Right: 170, Bottom: 256}
fab := a.Fit(b)
assert.Equal(a.Left, fab.Left)
assert.Equal(a.Right, fab.Right)
assert.True(fab.Top < fab.Bottom)
assert.True(fab.Left < fab.Right)
assert.True(math.Abs(b.Aspect()-fab.Aspect()) < 0.02)
fac := a.Fit(c)
assert.Equal(a.Top, fac.Top)
assert.Equal(a.Bottom, fac.Bottom)
assert.True(math.Abs(c.Aspect()-fac.Aspect()) < 0.02)
}
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func TestBoxConstrain(t *testing.T) {
assert := assert.New(t)
a := Box{Top: 64, Left: 64, Right: 192, Bottom: 192}
b := Box{Top: 16, Left: 16, Right: 256, Bottom: 170}
c := Box{Top: 16, Left: 16, Right: 170, Bottom: 256}
cab := a.Constrain(b)
assert.Equal(64, cab.Top)
assert.Equal(64, cab.Left)
assert.Equal(192, cab.Right)
assert.Equal(170, cab.Bottom)
cac := a.Constrain(c)
assert.Equal(64, cac.Top)
assert.Equal(64, cac.Left)
assert.Equal(170, cac.Right)
assert.Equal(192, cac.Bottom)
}
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func TestBoxOuterConstrain(t *testing.T) {
assert := assert.New(t)
box := NewBox(0, 0, 100, 100)
canvas := NewBox(5, 5, 95, 95)
taller := NewBox(-10, 5, 50, 50)
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c := canvas.OuterConstrain(box, taller)
assert.Equal(15, c.Top, c.String())
assert.Equal(5, c.Left, c.String())
assert.Equal(95, c.Right, c.String())
assert.Equal(95, c.Bottom, c.String())
wider := NewBox(5, 5, 110, 50)
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d := canvas.OuterConstrain(box, wider)
assert.Equal(5, d.Top, d.String())
assert.Equal(5, d.Left, d.String())
assert.Equal(85, d.Right, d.String())
assert.Equal(95, d.Bottom, d.String())
}
func TestBoxShift(t *testing.T) {
assert := assert.New(t)
b := Box{
Top: 5,
Left: 5,
Right: 10,
Bottom: 10,
}
shifted := b.Shift(1, 2)
assert.Equal(7, shifted.Top)
assert.Equal(6, shifted.Left)
assert.Equal(11, shifted.Right)
assert.Equal(12, shifted.Bottom)
}
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func TestBoxCenter(t *testing.T) {
assert := assert.New(t)
b := Box{
Top: 10,
Left: 10,
Right: 20,
Bottom: 30,
}
cx, cy := b.Center()
assert.Equal(15, cx)
assert.Equal(20, cy)
}
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func TestBoxCornersCenter(t *testing.T) {
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assert := assert.New(t)
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bc := BoxCorners{
TopLeft: Point{5, 5},
TopRight: Point{15, 5},
BottomRight: Point{15, 15},
BottomLeft: Point{5, 15},
}
cx, cy := bc.Center()
assert.Equal(10, cx)
assert.Equal(10, cy)
}
func TestBoxCornersRotate(t *testing.T) {
assert := assert.New(t)
bc := BoxCorners{
TopLeft: Point{5, 5},
TopRight: Point{15, 5},
BottomRight: Point{15, 15},
BottomLeft: Point{5, 15},
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}
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rotated := bc.Rotate(45)
assert.True(rotated.TopLeft.Equals(Point{10, 3}), rotated.String())
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}