Build and test workflow.

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: Build
+run-name: "Build and test"
+
+on:
+  workflow_dispatch:
+  push:
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.22.3'
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...

pkg/migrator_test.go

@@ -61,7 +61,7 @@ var migrateAcrossVersionsTestCases = []struct {
 		currentVersion:              1,
 		versionTo:                   ptr(4),
 		includeMigrationsToVersions: []int{},
-		expected:                    version1Config,
+		expected:                    nilConfig,
 	},
 }
 
@@ -112,6 +112,8 @@ var migrationData = map[int]map[string]interface{}{
 	4: version4Migration,
 }
 
+var nilConfig = map[string]interface{}(nil)
+
 var version1Config = map[string]interface{}{
 	"agent": map[interface{}]interface{}{
 		"targetEnvironment": "test",