refactor: move things to packages

internal/updater/updater_test.go

@@ -0,0 +1,26 @@
+package updater
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type updaterTestCase struct {
+	name    string
+	content string
+	info    ReleaseInfo
+	want    string
+	wantErr assert.ErrorAssertionFunc
+}
+
+func runUpdaterTest(t *testing.T, constructor NewUpdater, tt updaterTestCase) {
+	t.Helper()
+
+	got, err := constructor(tt.info)(tt.content)
+	if !tt.wantErr(t, err, fmt.Sprintf("Updater(%v, %v)", tt.content, tt.info)) {
+		return
+	}
+	assert.Equalf(t, tt.want, got, "Updater(%v, %v)", tt.content, tt.info)
+}