rook: add convertNodeSelector function test

Signed-off-by: knrt10 <kautilya@kinvolk.io>

pkg/components/rook/component_test.go

@@ -0,0 +1,34 @@
+// Copyright 2020 The Lokomotive Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rook //nolint:testpackage
+
+import (
+	"testing"
+)
+
+func TestConvertNodeSelector(t *testing.T) {
+	m := map[string]string{
+		"key1": "val1",
+		"key2": "val2",
+		"key3": "val3",
+	}
+
+	expectedOutput := "key1=val1; key2=val2; key3=val3; "
+	actualOutput := convertNodeSelector(m)
+
+	if expectedOutput != actualOutput {
+		t.Fatalf("expected: %s, got: %s", expectedOutput, actualOutput)
+	}
+}