A rendering engine library for Go supporting both SDL2 and WebAssembly (HTML Canvas) targets.
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package render_test
import (
"strconv"
"testing"
"git.kirsle.net/go/render"
)
func TestPointInside(t *testing.T) {
type testCase struct {
rect render.Rect
p render.Point
shouldPass bool
}
tests := []testCase{
testCase{
rect: render.Rect{
X: 0,
Y: 0,
W: 500,
H: 500,
},
p: render.NewPoint(128, 256),
shouldPass: true,
},
testCase{
rect: render.Rect{
X: 100,
Y: 80,
W: 40,
H: 60,
},
p: render.NewPoint(128, 256),
shouldPass: false,
},
testCase{
// true values when debugging why Doodads weren't
// considered inside the viewport.
rect: render.Rect{
X: 0,
Y: -232,
H: 874,
W: 490,
},
p: render.NewPoint(509, 260),
shouldPass: false,
},
}
for _, test := range tests {
if test.p.Inside(test.rect) != test.shouldPass {
t.Errorf("Failed: %s inside %s should be %s",
test.p,
test.rect,
strconv.FormatBool(test.shouldPass),
)
}
}
}
// Test the Compare function of Point.
func TestPointDelta(t *testing.T) {
var tests = []struct {
A render.Point // source
B render.Point // comparator
D render.Point // expected delta value
}{
{
A: render.NewPoint(0, 0),
B: render.NewPoint(10, 10),
D: render.NewPoint(10, 10),
},
{
A: render.NewPoint(128, 128),
B: render.NewPoint(128, 128),
D: render.NewPoint(0, 0),
},
{
A: render.NewPoint(128, 128),
B: render.NewPoint(127, 129),
D: render.NewPoint(-1, 1),
},
{
A: render.NewPoint(200, 500),
B: render.NewPoint(180, 528),
D: render.NewPoint(-20, 28),
},
}
for _, test := range tests {
actual := test.A.Compare(test.B)
if actual != test.D {
t.Errorf("Failed: (%s).Compare(%s) expected %s but got %s",
test.A, test.B, test.D, actual,
)
}
}
}