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bounds_test.go
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bounds_test.go
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package geom
import (
"reflect"
"testing"
)
func TestBoundsExtend(t *testing.T) {
for _, tc := range []struct {
b *Bounds
g T
want *Bounds
}{
{
b: NewBounds(XY).SetCoords(Coord{0, 0}, Coord{0, 0}),
g: NewPoint(XY).MustSetCoords(Coord{10, -10}),
want: NewBounds(XY).SetCoords(Coord{0, -10}, Coord{10, 0}),
},
{
b: NewBounds(XY).SetCoords(Coord{-100, -100}, Coord{100, 100}),
g: NewPoint(XY).MustSetCoords(Coord{-10, 10}),
want: NewBounds(XY).SetCoords(Coord{-100, -100}, Coord{100, 100}),
},
{
b: NewBounds(XYZ).SetCoords(Coord{0, 0, -1}, Coord{10, 10, 1}),
g: NewPoint(XY).MustSetCoords(Coord{5, -10}),
want: NewBounds(XYZ).SetCoords(Coord{0, -10, -1}, Coord{10, 10, 1}),
},
{
b: NewBounds(XYZ).SetCoords(Coord{0, 0, 0}, Coord{10, 10, 10}),
g: NewPoint(XYZ).MustSetCoords(Coord{5, -10, 3}),
want: NewBounds(XYZ).SetCoords(Coord{0, -10, 0}, Coord{10, 10, 10}),
},
{
b: NewBounds(XYZ).SetCoords(Coord{0, 0, 0}, Coord{10, 10, 10}),
g: NewMultiPoint(XYM).MustSetCoords([]Coord{{-1, -1, -1}, {11, 11, 11}}),
want: NewBounds(XYZM).SetCoords(Coord{-1, -1, 0, -1}, Coord{11, 11, 10, 11}),
},
{
b: NewBounds(XY).SetCoords(Coord{0, 0}, Coord{10, 10}),
g: NewMultiPoint(XYM).MustSetCoords([]Coord{{-1, -1, -1}, {11, 11, 11}}),
want: NewBounds(XYM).SetCoords(Coord{-1, -1, -1}, Coord{11, 11, 11}),
},
{
b: NewBounds(XY).SetCoords(Coord{0, 0}, Coord{10, 10}),
g: NewMultiPoint(XYZ).MustSetCoords([]Coord{{-1, -1, -1}, {11, 11, 11}}),
want: NewBounds(XYZ).SetCoords(Coord{-1, -1, -1}, Coord{11, 11, 11}),
},
{
b: NewBounds(XYM).SetCoords(Coord{0, 0, 0}, Coord{10, 10, 10}),
g: NewMultiPoint(XYZ).MustSetCoords([]Coord{{-1, -1, -1}, {11, 11, 11}}),
want: NewBounds(XYZM).SetCoords(Coord{-1, -1, -1, 0}, Coord{11, 11, 11, 10}),
},
} {
if got := tc.b.Clone().Extend(tc.g); !reflect.DeepEqual(got, tc.want) {
t.Errorf("%+v.Extend(%+v) == %+v, want %+v", tc.b, tc.g, got, tc.want)
}
}
}
func TestBoundsIsEmpty(t *testing.T) {
for i, testData := range []struct {
bounds Bounds
isEmpty bool
}{
{
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{-1, -1}},
isEmpty: true,
}, {
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{0, 0}},
isEmpty: false,
},
{
bounds: Bounds{layout: XY, min: Coord{-100, -100}, max: Coord{100, 100}},
isEmpty: false,
},
} {
copy := Bounds{layout: testData.bounds.layout, min: testData.bounds.min, max: testData.bounds.max}
for j := 0; j < 10; j++ {
// do multiple checks to verify no obvious side effects are caused
isEmpty := copy.IsEmpty()
if isEmpty != testData.isEmpty {
t.Errorf("Test %v Failed. Expected: %v but got: %v", i+1, testData.isEmpty, isEmpty)
break
}
if !reflect.DeepEqual(copy, testData.bounds) {
t.Errorf("Test %v Failed. Function IsEmpty modified internal state of bounds. Before: \n%v After: \n%v", i+1, testData.bounds, copy)
break
}
}
}
}
func TestBoundsOverlaps(t *testing.T) {
for i, testData := range []struct {
bounds, other Bounds
overlaps bool
}{
{
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{0, 0}},
other: Bounds{layout: XY, min: Coord{-10, 0}, max: Coord{-5, 10}},
overlaps: false,
},
{
bounds: Bounds{layout: XY, min: Coord{-100, -100}, max: Coord{100, 100}},
other: Bounds{layout: XY, min: Coord{-10, 0}, max: Coord{-5, 10}},
overlaps: true,
},
{
bounds: Bounds{layout: XY, min: Coord{1, 1}, max: Coord{5, 5}},
other: Bounds{layout: XY, min: Coord{-5, -5}, max: Coord{-1, -1}},
overlaps: false,
},
{
bounds: Bounds{layout: XYZ, min: Coord{-100, -100, -100}, max: Coord{100, 100, 100}},
other: Bounds{layout: XYZ, min: Coord{-10, 0, 0}, max: Coord{-5, 10, 10}},
overlaps: true,
},
{
bounds: Bounds{layout: XYZ, min: Coord{0, 0, 0}, max: Coord{100, 100, 100}},
other: Bounds{layout: XYZ, min: Coord{5, 5, -10}, max: Coord{10, 10, -5}},
overlaps: false,
},
{
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{0, 0}},
other: Bounds{layout: XY, min: Coord{-10, -10}, max: Coord{-0.000000000000000000000000000001, 0}},
overlaps: false,
},
} {
copy := Bounds{layout: testData.bounds.layout, min: testData.bounds.min, max: testData.bounds.max}
for j := 0; j < 10; j++ {
// do multiple checks to verify no obvious side effects are caused
overlaps := copy.Overlaps(testData.bounds.layout, &testData.other)
if overlaps != testData.overlaps {
t.Errorf("Test %v Failed. Expected: %v but got: %v", i+1, testData.overlaps, overlaps)
break
}
if !reflect.DeepEqual(copy, testData.bounds) {
t.Errorf("Test %v Failed. Function Overlaps modified internal state of bounds. Before: \n%v After: \n%v", i+1, testData.bounds, copy)
break
}
}
}
}
func TestBoundsOverlapsPoint(t *testing.T) {
for i, testData := range []struct {
bounds Bounds
point Coord
overlaps bool
}{
{
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{0, 0}},
point: Coord{-10, 0},
overlaps: false,
},
{
bounds: Bounds{layout: XY, min: Coord{-100, -100}, max: Coord{100, 100}},
point: Coord{-10, 0},
overlaps: true,
},
{
bounds: Bounds{layout: XYZ, min: Coord{-100, -100, -100}, max: Coord{100, 100, 100}},
point: Coord{-5, 10, 10},
overlaps: true,
},
{
bounds: Bounds{layout: XYZ, min: Coord{0, 0, 0}, max: Coord{100, 100, 100}},
point: Coord{5, 5, -10},
overlaps: false,
},
{
bounds: Bounds{layout: XY, min: Coord{0, 0}, max: Coord{10, 10}},
point: Coord{-0.000000000000000000000000000001, 0},
overlaps: false,
},
} {
copy := Bounds{layout: testData.bounds.layout, min: testData.bounds.min, max: testData.bounds.max}
for j := 0; j < 10; j++ {
// do multiple checks to verify no obvious side effects are caused
overlaps := copy.OverlapsPoint(testData.bounds.layout, testData.point)
if overlaps != testData.overlaps {
t.Errorf("Test %v Failed. Expected: %v but got: %v", i+1, testData.overlaps, overlaps)
break
}
if !reflect.DeepEqual(copy, testData.bounds) {
t.Errorf("Test %v Failed. Function Overlaps modified internal state of bounds. Before: \n%v After: \n%v", i+1, testData.bounds, copy)
break
}
}
}
}
func TestBoundsSet(t *testing.T) {
bounds := Bounds{layout: XY, min: Coord{0, 0}, max: Coord{10, 10}}
bounds.Set(0, 0, 20, 20)
expected := Bounds{layout: XY, min: Coord{0, 0}, max: Coord{20, 20}}
if !reflect.DeepEqual(expected, bounds) {
t.Errorf("Expected %v but got %v", expected, bounds)
}
func() {
defer func() {
if r := recover(); r == nil {
t.Error("Expected a panic but didn't get it as expected")
} else if !reflect.DeepEqual(expected, bounds) {
t.Errorf("Set modified bounds even though error was thrown. Before %v after %v", expected, bounds)
}
}()
bounds.Set(2, 2, 2, 2, 2)
}()
}
func TestBoundsSetCoords(t *testing.T) {
bounds := &Bounds{layout: XY, min: Coord{0, 0}, max: Coord{10, 10}}
bounds.SetCoords(Coord{0, 0}, Coord{20, 20})
expected := Bounds{layout: XY, min: Coord{0, 0}, max: Coord{20, 20}}
if !reflect.DeepEqual(expected, *bounds) {
t.Errorf("Expected %v but got %v", expected, *bounds)
}
bounds = NewBounds(XY)
bounds.SetCoords(Coord{0, 0}, Coord{20, 20})
if !reflect.DeepEqual(expected, *bounds) {
t.Errorf("Expected %v but got %v", expected, *bounds)
}
bounds = NewBounds(XY)
bounds.SetCoords(Coord{20, 0}, Coord{0, 20}) // set coords should ensure valid min / max
if !reflect.DeepEqual(expected, *bounds) {
t.Errorf("Expected %v but got %v", expected, *bounds)
}
}