Isolated content of pkg/kustomize

pkg/commands/build_test.go

@@ -0,0 +1,152 @@
+/*
+Copyright 2017 The Kubernetes 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 commands
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/ghodss/yaml"
+
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/kubectl/pkg/kustomize/constants"
+	"k8s.io/kubectl/pkg/kustomize/util/fs"
+)
+
+type buildTestCase struct {
+	Description string   `yaml:"description"`
+	Args        []string `yaml:"args"`
+	Filename    string   `yaml:"filename"`
+	// path to the file that contains the expected output
+	ExpectedStdout string `yaml:"expectedStdout"`
+	ExpectedError  string `yaml:"expectedError"`
+}
+
+func TestBuildValidate(t *testing.T) {
+	var cases = []struct {
+		name  string
+		args  []string
+		path  string
+		erMsg string
+	}{
+		{"noargs", []string{}, "./", ""},
+		{"file", []string{"beans"}, "beans", ""},
+		{"path", []string{"a/b/c"}, "a/b/c", ""},
+		{"path", []string{"too", "many"},
+			"", "specify one path to " + constants.KustomizationFileName},
+	}
+	for _, mycase := range cases {
+		opts := buildOptions{}
+		e := opts.Validate(mycase.args)
+		if len(mycase.erMsg) > 0 {
+			if e == nil {
+				t.Errorf("%s: Expected an error %v", mycase.name, mycase.erMsg)
+			}
+			if e.Error() != mycase.erMsg {
+				t.Errorf("%s: Expected error %s, but got %v", mycase.name, mycase.erMsg, e)
+			}
+			continue
+		}
+		if e != nil {
+			t.Errorf("%s: unknown error %v", mycase.name, e)
+			continue
+		}
+		if opts.kustomizationPath != mycase.path {
+			t.Errorf("%s: expected path '%s', got '%s'", mycase.name, mycase.path, opts.kustomizationPath)
+		}
+	}
+}
+
+func TestBuild(t *testing.T) {
+	const updateEnvVar = "UPDATE_KUSTOMIZE_EXPECTED_DATA"
+	updateKustomizeExpected := os.Getenv(updateEnvVar) == "true"
+	fs := fs.MakeRealFS()
+
+	testcases := sets.NewString()
+	filepath.Walk("testdata", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if path == "testdata" {
+			return nil
+		}
+		name := filepath.Base(path)
+		if info.IsDir() {
+			if strings.HasPrefix(name, "testcase-") {
+				testcases.Insert(strings.TrimPrefix(name, "testcase-"))
+			}
+			return filepath.SkipDir
+		}
+		return nil
+	})
+	// sanity check that we found the right folder
+	if !testcases.Has("simple") {
+		t.Fatalf("Error locating testcases")
+	}
+
+	for _, testcaseName := range testcases.List() {
+		t.Run(testcaseName, func(t *testing.T) {
+			name := testcaseName
+			testcase := buildTestCase{}
+			testcaseDir := filepath.Join("testdata", "testcase-"+name)
+			testcaseData, err := ioutil.ReadFile(filepath.Join(testcaseDir, "test.yaml"))
+			if err != nil {
+				t.Fatalf("%s: %v", name, err)
+			}
+			if err := yaml.Unmarshal(testcaseData, &testcase); err != nil {
+				t.Fatalf("%s: %v", name, err)
+			}
+
+			ops := &buildOptions{
+				kustomizationPath: testcase.Filename,
+			}
+			buf := bytes.NewBuffer([]byte{})
+			err = ops.RunBuild(buf, os.Stderr, fs)
+			switch {
+			case err != nil && len(testcase.ExpectedError) == 0:
+				t.Errorf("unexpected error: %v", err)
+			case err != nil && len(testcase.ExpectedError) != 0:
+				if !strings.Contains(err.Error(), testcase.ExpectedError) {
+					t.Errorf("expected error to contain %q but got: %v", testcase.ExpectedError, err)
+				}
+				return
+			case err == nil && len(testcase.ExpectedError) != 0:
+				t.Errorf("unexpected no error")
+			}
+
+			actualBytes := buf.Bytes()
+			if !updateKustomizeExpected {
+				expectedBytes, err := ioutil.ReadFile(testcase.ExpectedStdout)
+				if err != nil {
+					t.Errorf("unexpected error: %v", err)
+				}
+				if !reflect.DeepEqual(actualBytes, expectedBytes) {
+					t.Errorf("%s\ndoesn't equal expected:\n%s\n", actualBytes, expectedBytes)
+				}
+			} else {
+				ioutil.WriteFile(testcase.ExpectedStdout, actualBytes, 0644)
+			}
+
+		})
+	}
+
+}