Merge pull request #10 from stefanb/build-test-workflow

Go build & test workflow

.github/workflows/go.yml

@@ -0,0 +1,28 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    branches: [ "v2" ]
+  pull_request:
+    branches: [ "v2" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: stable
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v -race ./... -cover

.github/workflows/golangci-lint.yml

@@ -6,6 +6,7 @@ on:
     branches:
       - master
       - main
+      - v2
   pull_request:
 permissions:
   contents: read
@@ -17,9 +18,9 @@ jobs:
     runs-on: ubuntu-latest
     environment: CI
     steps:
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
         with:
-          go-version: 1.21
-      - uses: actions/checkout@v3
+          go-version: stable
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6

wgs84_test.go

@@ -0,0 +1,42 @@
+package wgs84
+
+import (
+	"testing"
+)
+
+func TestTransform(t *testing.T) {
+	tests := []struct {
+		name     string
+		fromEpsg int
+		inA      float64
+		inB      float64
+		inC      float64
+		toEpsg   int
+		wantA    float64
+		wantB    float64
+		wantC    float64
+	}{
+		{"Web Mercator: EPSG(4326) to EPSG(3857)", 4326, 10, 50, 0, 3857, 1.113194908e+06, 6.446275841e+06, 0},
+		{"OSGB: EPSG(4326) to EPSG(27700)", 4326, -2.25, 52.25, 0, 27700, 383029.296, 261341.615, 0},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			fromEPSG := EPSG(tt.fromEpsg)
+			toEPSG := EPSG(tt.toEpsg)
+
+			transform := Transform(fromEPSG, toEPSG).Round(3)
+
+			gotA, gotB, gotC := transform(tt.inA, tt.inB, tt.inC)
+
+			if gotA != tt.wantA {
+				t.Errorf("Transform() A = %v, want %v", gotA, tt.wantA)
+			}
+			if gotB != tt.wantB {
+				t.Errorf("Transform() B = %v, want %v", gotB, tt.wantB)
+			}
+			if gotC != tt.wantC {
+				t.Errorf("Transform() C = %v, want %v", gotC, tt.wantC)
+			}
+		})
+	}
+}