kubernetes options_test 源码
kubernetes options_test 代码
文件路径:/cluster/images/etcd/migrate/options_test.go
/*
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 main
import (
"os"
"testing"
)
func setEnvVar(t *testing.T, env, val string, exists bool) {
if exists {
if err := os.Setenv(env, val); err != nil {
t.Errorf("could't set env %s: %v", env, err)
}
return
}
if err := os.Unsetenv(env); err != nil {
t.Errorf("couldn't unset env %s: %v", env, err)
}
}
func TestFallbackToEnv(t *testing.T) {
testCases := []struct {
desc string
env string
value string
valueSet bool
expectedValue string
expectedError bool
}{
{
desc: "value unset",
env: "FOO",
valueSet: false,
expectedValue: "",
expectedError: true,
},
{
desc: "value set empty",
env: "FOO",
value: "",
valueSet: true,
expectedValue: "",
expectedError: true,
},
{
desc: "value set",
env: "FOO",
value: "foo",
valueSet: true,
expectedValue: "foo",
expectedError: false,
},
}
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
prevVal, prevOk := os.LookupEnv(test.env)
defer func() {
// preserve the original behavior
setEnvVar(t, test.env, prevVal, prevOk)
}()
setEnvVar(t, test.env, test.value, test.valueSet)
value, err := fallbackToEnv("some-flag", test.env)
if test.expectedError {
if err == nil {
t.Errorf("expected error, got: %v", err)
}
} else {
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if value != test.expectedValue {
t.Errorf("unexpected result: %s, expected: %s", value, test.expectedValue)
}
}
})
}
}
func TestFallbackToEnvWithDefault(t *testing.T) {
testCases := []struct {
desc string
env string
value string
valueSet bool
defaultValue string
expectedValue string
expectedError bool
}{
{
desc: "value unset",
env: "FOO",
valueSet: false,
defaultValue: "default",
expectedValue: "default",
},
{
desc: "value set empty",
env: "FOO",
value: "",
valueSet: true,
defaultValue: "default",
expectedValue: "default",
},
{
desc: "value set",
env: "FOO",
value: "foo",
valueSet: true,
defaultValue: "default",
expectedValue: "foo",
},
}
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
prevVal, prevOk := os.LookupEnv(test.env)
defer func() {
// preserve the original behavior
setEnvVar(t, test.env, prevVal, prevOk)
}()
setEnvVar(t, test.env, test.value, test.valueSet)
value := fallbackToEnvWithDefault("some-flag", test.env, test.defaultValue)
if value != test.expectedValue {
t.Errorf("unexpected result: %s, expected: %s", value, test.expectedValue)
}
})
}
}
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