Add PrintPluginEnv plugin.

plugin/someteam.example.com/v1/printpluginenv/PrintPluginEnv_test.go

@@ -0,0 +1,40 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package main_test
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/api/testutils/kusttest"
+)
+
+func shouldContain(t *testing.T, s []byte, x string) {
+	if !strings.Contains(string(s), x) {
+		t.Fatalf("unable to find %s", x)
+	}
+}
+
+func TestPrintPluginEnvPlugin(t *testing.T) {
+	tc := kusttest_test.NewPluginTestEnv(t).Set()
+	defer tc.Reset()
+
+	tc.PrepExecPlugin(
+		"someteam.example.com", "v1", "PrintPluginEnv")
+
+	th := kusttest_test.NewKustTestHarnessAllowPlugins(t, "/theAppRoot")
+
+	m := th.LoadAndRunGenerator(`
+apiVersion: someteam.example.com/v1
+kind: PrintPluginEnv
+metadata:
+  name: whatever
+`)
+	a, err := m.AsYaml()
+	if err != nil {
+		t.Error(err)
+	}
+	shouldContain(t, a, "kustomize_plugin_config_root: /theAppRoot")
+	shouldContain(t, a, "plugin/someteam.example.com/v1/printpluginenv")
+}