feat(helm): use helm upgrade for install [r8s-258] (#568)

pkg/libhelm/test/mock.go

@@ -73,6 +73,11 @@ func (hpm *helmMockPackageManager) Install(installOpts options.InstallOptions) (
 	return newMockRelease(releaseElement), nil
 }
 
+// Upgrade a helm chart (not thread safe)
+func (hpm *helmMockPackageManager) Upgrade(upgradeOpts options.InstallOptions) (*release.Release, error) {
+	return hpm.Install(upgradeOpts)
+}
+
 // Show values/readme/chart etc
 func (hpm *helmMockPackageManager) Show(showOpts options.ShowOptions) ([]byte, error) {
 	switch showOpts.OutputFormat {

pkg/libhelm/test/values.go

@@ -0,0 +1,26 @@
+package test
+
+import (
+	"os"
+)
+
+// CreateValuesFile creates a temporary file with the given content for testing
+func CreateValuesFile(values string) (string, error) {
+	file, err := os.CreateTemp("", "helm-values")
+	if err != nil {
+		return "", err
+	}
+
+	_, err = file.WriteString(values)
+	if err != nil {
+		file.Close()
+		return "", err
+	}
+
+	err = file.Close()
+	if err != nil {
+		return "", err
+	}
+
+	return file.Name(), nil
+}