Switch to black box testing of KustTarget and Resource

pkg/types/genargs.go

@@ -16,6 +16,11 @@ limitations under the License.
 
 package types
 
+import (
+	"strconv"
+	"strings"
+)
+
 // GenArgs contains both generator args and options
 type GenArgs struct {
 	args *GeneratorArgs
@@ -30,6 +35,18 @@ func NewGenArgs(args *GeneratorArgs, opts *GeneratorOptions) *GenArgs {
 	}
 }
 
+func (g *GenArgs) String() string {
+	if g == nil {
+		return "{nilGenArgs}"
+	}
+	return "{" +
+		strings.Join([]string{
+			"nsfx:" + strconv.FormatBool(g.NeedsHashSuffix()),
+			"beh:" + g.Behavior().String()},
+			",") +
+		"}"
+}
+
 // NeedHashSuffix returns true if the hash suffix is needed.
 // It is needed when the two conditions are both met
 //  1) GenArgs is not nil

pkg/types/genargs_test.go

@@ -0,0 +1,47 @@
+/*
+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 types_test
+
+import (
+	"testing"
+
+	. "sigs.k8s.io/kustomize/pkg/types"
+)
+
+func TestGenArgs_String(t *testing.T) {
+	tests := []struct {
+		ga       *GenArgs
+		expected string
+	}{
+		{
+			ga:       nil,
+			expected: "{nilGenArgs}",
+		},
+		{
+			ga:       &GenArgs{},
+			expected: "{nsfx:false,beh:unspecified}",
+		},
+		{
+			ga: NewGenArgs(
+				&GeneratorArgs{Behavior: "merge"},
+				&GeneratorOptions{DisableNameSuffixHash: false}),
+			expected: "{nsfx:true,beh:merge}",
+		},
+	}
+	for _, test := range tests {
+		if test.ga.String() != test.expected {
+			t.Fatalf("Expected '%s', got '%s'", test.expected, test.ga.String())
+		}
+	}
+}

pkg/types/var.go

@@ -75,9 +75,11 @@ type VarSet struct {
 	set []Var
 }
 
-// Set returns the var set.
+// Set returns a copy of the var set.
 func (vs *VarSet) Set() []Var {
-	return vs.set
+	s := make([]Var, len(vs.set))
+	copy(s, vs.set)
+	return s
 }
 
 // MergeSet absorbs other vars with error on name collision.