add unit test for metadata Validate

Signed-off-by: Zhou Hao <zhouhao@cn.fujitsu.com>
Signed-off-by: Matheus Hunsche <matheus.hunsche@ifood.com.br>

pkg/chart/metadata_test.go

@@ -0,0 +1,59 @@
+/*
+Copyright The Helm 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 chart
+
+import (
+	"testing"
+)
+
+func TestValidate(t *testing.T) {
+	tests := []struct {
+		md  *Metadata
+		err error
+	}{
+		{
+			nil,
+			ValidationError("chart.metadata is required"),
+		},
+		{
+			&Metadata{Name: "test", Version: "1.0"},
+			ValidationError("chart.metadata.apiVersion is required"),
+		},
+		{
+			&Metadata{APIVersion: "v2", Version: "1.0"},
+			ValidationError("chart.metadata.name is required"),
+		},
+		{
+			&Metadata{Name: "test", APIVersion: "v2"},
+			ValidationError("chart.metadata.version is required"),
+		},
+		{
+			&Metadata{Name: "test", APIVersion: "v2", Version: "1.0", Type: "test"},
+			ValidationError("chart.metadata.type must be application or library"),
+		},
+		{
+			&Metadata{Name: "test", APIVersion: "v2", Version: "1.0", Type: "application"},
+			nil,
+		},
+	}
+
+	for _, tt := range tests {
+		result := tt.md.Validate()
+		if result != tt.err {
+			t.Errorf("expected %s, got %s", tt.err, result)
+		}
+	}
+}