Move the k8s code generator.

cmd/k8scopy/internal/modulespec_test.go

@@ -0,0 +1,65 @@
+// Copyright 2021 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package internal_test
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	. "sigs.k8s.io/kustomize/cmd/k8scopy/internal"
+)
+
+var data = []byte(`module: k8s.io/apimachinery
+version: v0.17.0
+packages:
+- name: pkg/labels
+  files:
+  - labels.go
+  - selector.go
+  - zz_generated.deepcopy.go
+- name: pkg/selection
+  files:
+  - operator.go
+- name: pkg/util/sets
+  files:
+  - empty.go
+  - string.go
+- name: pkg/util/errors
+  files:
+  - errors.go
+- name: pkg/util/validation
+  files:
+  - validation.go
+- name: pkg/util/validation/field
+  files:
+  - errors.go
+  - path.go
+`)
+
+func TestReadSpec(t *testing.T) {
+	fn := writeFile(t, data)
+	defer os.Remove(fn)
+	x := ReadSpec(fn)
+	assert.Equal(t, "k8s.io/apimachinery@v0.17.0", x.Name())
+	assert.Equal(t, 6, len(x.Packages))
+	assert.Equal(t, "pkg/util/validation/field", x.Packages[5].Name)
+	assert.Equal(t, "path.go", x.Packages[5].Files[1])
+}
+
+// Write content to temp file, returning file name.
+func writeFile(t *testing.T, content []byte) string {
+	f, err := ioutil.TempFile("", "testjunk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err = f.Write(content); err != nil {
+		t.Fatal(err)
+	}
+	if err := f.Close(); err != nil {
+		t.Fatal(err)
+	}
+	return f.Name()
+}