unit tests for env vars with legacy kubecost names

pkg/env/costmodelenv_test.go

@@ -155,3 +155,82 @@ func TestGetCloudCostConfigPath(t *testing.T) {
 	}
 
 }
+
+func TestEnvVarsWithBackup(t *testing.T) {
+	t.Run("test install namespace env var", func(t *testing.T) {
+		t.Setenv(InstallNamespaceEnvVar, "test-namespace")
+		t.Setenv(KubecostNamespaceEnvVar, "kubecost-test-namespace")
+
+		ns := GetInstallNamespace()
+		if ns != "test-namespace" {
+			t.Errorf("Expected install namespace to be 'test-namespace', got '%s'", ns)
+		}
+	})
+	t.Run("test kubecost namespace env var", func(t *testing.T) {
+		t.Setenv(KubecostNamespaceEnvVar, "kc-test-namespace")
+
+		ns := GetInstallNamespace()
+
+		if ns != "kc-test-namespace" {
+			t.Errorf("Expected install namespace to be 'kc-test-namespace', got '%s'", ns)
+		}
+	})
+
+	t.Run("test default install namespace", func(t *testing.T) {
+		t.Setenv(InstallNamespaceEnvVar, "test-namespace")
+
+		ns := GetInstallNamespace()
+
+		if ns != "test-namespace" {
+			t.Errorf("Expected default install namespace to be 'test-namespace', got '%s'", ns)
+		}
+	})
+
+	t.Run("test default install namespace", func(t *testing.T) {
+		ns := GetInstallNamespace()
+
+		if ns != "opencost" {
+			t.Errorf("Expected default install namespace to be 'opencost', got '%s'", ns)
+		}
+	})
+
+	t.Run("test config bucket file with both", func(t *testing.T) {
+		t.Setenv(ConfigBucketEnvVar, "test-bucket")
+		t.Setenv(KubecostConfigBucketEnvVar, "kc-test-bucket")
+
+		configBucketFile := GetConfigBucketFile()
+
+		if configBucketFile != "test-bucket" {
+			t.Errorf("Expected config bucket file to be 'test-bucket', got '%s'", configBucketFile)
+		}
+	})
+
+	t.Run("test config bucket file with kc", func(t *testing.T) {
+		t.Setenv(KubecostConfigBucketEnvVar, "kc-test-bucket")
+
+		configBucketFile := GetConfigBucketFile()
+
+		if configBucketFile != "kc-test-bucket" {
+			t.Errorf("Expected config bucket file to be 'kc-test-bucket', got '%s'", configBucketFile)
+		}
+	})
+
+	t.Run("test config bucket file with single", func(t *testing.T) {
+		t.Setenv(ConfigBucketEnvVar, "test-bucket")
+
+		configBucketFile := GetConfigBucketFile()
+
+		if configBucketFile != "test-bucket" {
+			t.Errorf("Expected config bucket file to be 'test-bucket', got '%s'", configBucketFile)
+		}
+	})
+
+	t.Run("test config bucket file with both", func(t *testing.T) {
+		configBucketFile := GetConfigBucketFile()
+
+		if configBucketFile != "" {
+			t.Errorf("Expected config bucket file to be '', got '%s'", configBucketFile)
+		}
+	})
+
+}