/
zoom_test.go
232 lines (210 loc) · 4.38 KB
/
zoom_test.go
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package godelbrot
import (
"github.com/johnny-morrice/godelbrot/internal/bigbase"
"math/big"
"testing"
)
func TestMagnifyHalf(t *testing.T) {
target := ZoomTarget{}
target.Xmin = 10
target.Xmax = 30
target.Ymin = 20
target.Ymax = 50
req := DefaultRequest()
req.RealMin = "0.5"
req.RealMax = "0.6"
req.ImagMin = "0.3"
req.ImagMax = "0.4"
req.ImageWidth = 100
req.ImageHeight = 100
req.Precision = 53
expect := []*big.Float{
big.NewFloat(0.505),
big.NewFloat(0.565),
big.NewFloat(0.325),
big.NewFloat(0.39),
}
z := Zoom{ZoomTarget: target}
prev, conferr := Configure(req)
if conferr != nil {
t.Fatal(conferr)
}
z.Prev = *prev
mag, magerr := z.Magnify(0.5)
if magerr != nil {
t.Fatal(magerr)
}
actual := []*big.Float{
&mag.RealMin,
&mag.RealMax,
&mag.ImagMin,
&mag.ImagMax,
}
for i, ex := range expect {
ac := actual[i]
margin := big.NewFloat(0.0)
margin.Sub(ex, ac)
margin.Abs(margin)
if margin.Cmp(big.NewFloat(0.001)) > 0 {
t.Error("Fail at", i,
"expected", bigbase.DbgF(*ex), "but received", bigbase.DbgF(*ac))
}
}
}
func TestMagnifyWhole(t *testing.T) {
target := ZoomTarget{}
target.Xmin = 10
target.Xmax = 30
target.Ymin = 20
target.Ymax = 50
req := DefaultRequest()
req.RealMin = "0.5"
req.RealMax = "0.6"
req.ImagMin = "0.3"
req.ImagMax = "0.4"
req.ImageWidth = 100
req.ImageHeight = 100
req.Precision = 53
expect := []*big.Float{
big.NewFloat(0.51),
big.NewFloat(0.53),
big.NewFloat(0.35),
big.NewFloat(0.38),
}
z := Zoom{ZoomTarget: target}
prev, conferr := Configure(req)
if conferr != nil {
t.Fatal(conferr)
}
z.Prev = *prev
mag, magerr := z.Magnify(1.0)
if magerr != nil {
t.Fatal(magerr)
}
actual := []*big.Float{
&mag.RealMin,
&mag.RealMax,
&mag.ImagMin,
&mag.ImagMax,
}
for i, ex := range expect {
ac := actual[i]
margin := big.NewFloat(0.0)
margin.Sub(ex, ac)
margin.Abs(margin)
if margin.Cmp(big.NewFloat(0.001)) > 0 {
t.Error("Fail at", i,
"expected", bigbase.DbgF(*ex), "but received", bigbase.DbgF(*ac))
}
}
}
func TestMagnifyNeg(t *testing.T) {
target := ZoomTarget{}
target.Xmin = 10
target.Xmax = 30
target.Ymin = 10
target.Ymax = 30
req := DefaultRequest()
req.RealMin = "-1.0"
req.RealMax = "-0.5"
req.ImagMin = "-2.0"
req.ImagMax = "-1.5"
req.ImageWidth = 100
req.ImageHeight = 100
req.Precision = 53
expect := []*big.Float{
big.NewFloat(-0.95),
big.NewFloat(-0.85),
big.NewFloat(-1.65),
big.NewFloat(-1.55),
}
z := Zoom{ZoomTarget: target}
prev, conferr := Configure(req)
if conferr != nil {
t.Fatal(conferr)
}
z.Prev = *prev
mag, magerr := z.Magnify(1.0)
if magerr != nil {
t.Fatal(magerr)
}
actual := []*big.Float{
&mag.RealMin,
&mag.RealMax,
&mag.ImagMin,
&mag.ImagMax,
}
for i, ex := range expect {
ac := actual[i]
margin := big.NewFloat(0.0)
margin.Sub(ex, ac)
margin.Abs(margin)
if margin.Cmp(big.NewFloat(0.001)) > 0 {
t.Error("Fail at", i,
"expected", bigbase.DbgF(*ex), "but received", bigbase.DbgF(*ac))
}
}
}
func TestMovie(t *testing.T) {
const framecnt = 2
target := ZoomTarget{}
target.Xmin = 10
target.Xmax = 30
target.Ymin = 20
target.Ymax = 50
target.Frames = framecnt
req := DefaultRequest()
req.RealMin = "0.5"
req.RealMax = "0.6"
req.ImagMin = "0.3"
req.ImagMax = "0.4"
req.ImageWidth = 100
req.ImageHeight = 100
req.Precision = 53
expectations := make([][]*big.Float, framecnt)
expectations[0] = []*big.Float{
big.NewFloat(0.505),
big.NewFloat(0.565),
big.NewFloat(0.325),
big.NewFloat(0.39),
}
expectations[1] = []*big.Float{
big.NewFloat(0.51),
big.NewFloat(0.53),
big.NewFloat(0.35),
big.NewFloat(0.38),
}
z := Zoom{ZoomTarget: target}
prev, conferr := Configure(req)
if conferr != nil {
t.Fatal(conferr)
}
z.Prev = *prev
frames, magerr := z.Movie()
if magerr != nil {
t.Fatal(magerr)
}
actualities := make([][]*big.Float, framecnt)
for i, fr := range frames {
fract := []*big.Float{
&fr.RealMin,
&fr.RealMax,
&fr.ImagMin,
&fr.ImagMax,
}
actualities[i] = fract
}
for i, expectSet := range expectations {
actualSet := actualities[i]
for j, ex := range expectSet {
ac := actualSet[j]
margin := big.NewFloat(0.0)
margin.Sub(ex, ac)
margin.Abs(margin)
if margin.Cmp(big.NewFloat(0.001)) > 0 {
t.Error("Fail at frame", i, "bound", j,
"expected", bigbase.DbgF(*ex), "but received", bigbase.DbgF(*ac))
}
}
}
}