From 1e6179d372b49bf6ac435ea9ce5400824a0cd427 Mon Sep 17 00:00:00 2001
From: Since <ax20yhum@cip.cs.fau.de>
Date: Sun, 19 Mar 2017 21:59:22 +0100
Subject: [PATCH] Add resolution test
---
translate_test.go | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/translate_test.go b/translate_test.go
index 4dba9db..b2cc8f7 100644
--- a/translate_test.go
+++ b/translate_test.go
@@ -5,6 +5,40 @@ import (
"testing"
)
+func TestResolution(t *testing.T) {
+ equal := func(a, b float64) bool {
+ epsilon := 0.000001 // inaccuracy by 1mm
+ return math.Abs(a-b) < epsilon
+ }
+
+ var (
+ srcLat, srcLon = 48.173146, 11.546604 // Munich
+ dstLat, dstLon = 53.534366, 08.576135 // Bremerhaven
+ expDist = 663.629945199998 // km
+ )
+ dummys := []*Composite{
+ NewDummy("SF", 900, 900),
+ NewDummy("SF", 450, 450),
+ NewDummy("SF", 225, 225),
+ NewDummy("SF", 112, 112),
+ NewDummy("SF", 627, 212),
+ }
+
+ for _, comp := range dummys {
+ srcX, srcY := comp.Translate(srcLat, srcLon)
+ dstX, dstY := comp.Translate(dstLat, dstLon)
+
+ vecX, vecY := (srcX-dstX)*comp.Rx, (srcY-dstY)*comp.Ry
+ resDist := math.Sqrt(vecX*vecX + vecY*vecY)
+
+ if !equal(resDist, expDist) {
+ t.Errorf("dummy.Rx = %#v, dummy.Ry = %#v; distance: %#v expected: %#v)",
+ comp.Rx, comp.Ry, resDist, expDist)
+ }
+ }
+
+}
+
func TestTranslate(t *testing.T) {
equal := func(a, b float64) bool {
epsilon := 0.1 // inaccuracy by 100 meters
--
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