More fully in-memory integration tests.

pkg/target/utils_for_test.go

@@ -0,0 +1,131 @@
+/*
+Copyright 2018 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 target
+
+// A collection of utilities used in target tests.
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/k8sdeps/transformer"
+	"sigs.k8s.io/kustomize/pkg/constants"
+	"sigs.k8s.io/kustomize/pkg/fs"
+	"sigs.k8s.io/kustomize/pkg/ifc"
+	"sigs.k8s.io/kustomize/pkg/internal/loadertest"
+)
+
+func makeKustTarget(t *testing.T, l ifc.Loader) *KustTarget {
+	// Warning: the following filesystem - a fake - must be rooted at /.
+	// This fs root is used as the working directory for the shell spawned by
+	// the secretgenerator, and has nothing to do with the filesystem used
+	// to load relative paths from the fake filesystem.
+	// This trick only works for secret generator commands that don't actually
+	// try to read the file system, because these tests don't write to the
+	// real "/" directory.  See use of exec package in the secretfactory.
+	fakeFs := fs.MakeFakeFS()
+	fakeFs.Mkdir("/")
+	kt, err := NewKustTarget(
+		l, fakeFs, rf, transformer.NewFactoryImpl())
+	if err != nil {
+		t.Fatalf("Unexpected construction error %v", err)
+	}
+	return kt
+}
+
+func writeF(
+	t *testing.T, ldr loadertest.FakeLoader, dir string, content string) {
+	err := ldr.AddFile(dir, []byte(content))
+	if err != nil {
+		t.Fatalf("failed write to %s; %v", dir, err)
+	}
+}
+
+func writeK(
+	t *testing.T, ldr loadertest.FakeLoader, dir string, content string) {
+	writeF(t, ldr, filepath.Join(dir, constants.KustomizationFileName), `
+apiVersion: v1
+kind: Kustomization
+`+content)
+}
+
+func tabToSpace(input string) string {
+	var result []string
+	for _, i := range input {
+		if i == 9 {
+			result = append(result, "  ")
+		} else {
+			result = append(result, string(i))
+		}
+	}
+	return strings.Join(result, "")
+}
+
+func convertToArray(x string) ([]string, int) {
+	a := strings.Split(strings.TrimSuffix(x, "\n"), "\n")
+	maxLen := 0
+	for i, v := range a {
+		z := tabToSpace(v)
+		if len(z) > maxLen {
+			maxLen = len(z)
+		}
+		a[i] = z
+	}
+	return a, maxLen
+}
+
+func hint(a, b string) string {
+	if a == b {
+		return " "
+	}
+	return "X"
+}
+
+// Pretty printing of file differences.
+func assertExpectedEqualsActual(t *testing.T, actual []byte, expected string) {
+	if expected == string(actual) {
+		return
+	}
+	sE, maxLen := convertToArray(expected)
+	sA, _ := convertToArray(string(actual))
+	format := fmt.Sprintf("%%s  %%-%ds %%s\n", maxLen+4)
+
+	limit := 0
+	if len(sE) < len(sA) {
+		limit = len(sE)
+	} else {
+		limit = len(sA)
+	}
+
+	fmt.Printf(format, " ", "EXPECTED", "ACTUAL")
+	fmt.Printf(format, " ", "--------", "------")
+	for i := 0; i < limit; i++ {
+		fmt.Printf(format, hint(sE[i], sA[i]), sE[i], sA[i])
+	}
+	if len(sE) < len(sA) {
+		for i := len(sE); i < len(sA); i++ {
+			fmt.Printf(format, "X", "", sA[i])
+		}
+	} else {
+		for i := len(sA); i < len(sE); i++ {
+			fmt.Printf(format, "X", sE[i], "")
+		}
+	}
+	t.Fatalf("Expected not equal to actual")
+}