httpbin: add test for manifest rendering

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

pkg/components/httpbin/component_test.go

@@ -0,0 +1,81 @@
+// 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 httpbin_test
+
+import (
+	"testing"
+
+	"github.com/kinvolk/lokomotive/pkg/components"
+	"github.com/kinvolk/lokomotive/pkg/components/util"
+)
+
+const name = "httpbin"
+
+func TestRenderManifest(t *testing.T) {
+	tests := []struct {
+		desc    string
+		hcl     string
+		wantErr bool
+	}{
+		{
+			desc: "Valid config",
+			hcl: `
+component "httpbin" {
+	ingress_host = "foo"
+}
+			`,
+		},
+		{
+			desc: "invalid config",
+			hcl: `
+component "dex" {
+  certmanager_cluster_issuer = "letsencrypt-staging"
+}
+			`,
+			wantErr: true,
+		},
+	}
+
+	for _, tc := range tests {
+		b, d := util.GetComponentBody(tc.hcl, name)
+		if d != nil {
+			t.Errorf("%s - Error getting component body: %v", tc.desc, d)
+		}
+
+		c, err := components.Get(name)
+		if err != nil {
+			t.Fatalf("failed getting component: %v", err)
+		}
+
+		d = c.LoadConfig(b, nil)
+
+		if !tc.wantErr && d.HasErrors() {
+			t.Errorf("%s - Valid config should not return error, got: %s", tc.desc, d)
+		}
+
+		if tc.wantErr && !d.HasErrors() {
+			t.Errorf("%s - Wrong config should have returned an error", tc.desc)
+		}
+
+		m, err := c.RenderManifests()
+		if err != nil {
+			t.Errorf("%s - Rendering manifests with valid config should succeed, got: %s", tc.desc, err)
+		}
+
+		if len(m) == 0 {
+			t.Errorf("%s - Rendered manifests shouldn't be empty", tc.desc)
+		}
+	}
+}