cleanup some dead kubectl code and narrow scope of helpers

pkg/kubectl/cmd/set/env/env_parse_test.go

@@ -0,0 +1,69 @@
+/*
+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 env
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+func ExampleIsEnvironmentArgument_true() {
+	test := "returns=true"
+	fmt.Println(IsEnvironmentArgument(test))
+	// Output: true
+}
+
+func ExampleIsEnvironmentArgument_false() {
+	test := "returnsfalse"
+	fmt.Println(IsEnvironmentArgument(test))
+	// Output: false
+}
+
+func ExampleIsValidEnvironmentArgument_true() {
+	test := "wordcharacters=true"
+	fmt.Println(IsValidEnvironmentArgument(test))
+	// Output: true
+}
+
+func ExampleIsValidEnvironmentArgument_false() {
+	test := "not$word^characters=test"
+	fmt.Println(IsValidEnvironmentArgument(test))
+	// Output: false
+}
+
+func ExampleSplitEnvironmentFromResources() {
+	args := []string{`resource`, "ENV\\=ARG", `ONE\=MORE`, `DASH-`}
+	fmt.Println(SplitEnvironmentFromResources(args))
+	// Output: [resource] [ENV\=ARG ONE\=MORE DASH-] true
+}
+
+func ExampleParseEnv_good() {
+	r := strings.NewReader("FROM=READER")
+	ss := []string{"ENV=VARIABLE", "AND=ANOTHER", "REMOVE-", "-"}
+	fmt.Println(ParseEnv(ss, r))
+	// Output:
+	// [{ENV VARIABLE nil} {AND ANOTHER nil} {FROM READER nil}] [REMOVE] <nil>
+}
+
+func ExampleParseEnv_bad() {
+	var r io.Reader
+	bad := []string{"This not in the key=value format."}
+	fmt.Println(ParseEnv(bad, r))
+	// Output:
+	// [] [] environment variables must be of the form key=value and can only contain letters, numbers, and underscores
+}