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setup.go
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setup.go
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/*
* Copyright 2016 ClusterHQ
*
* 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 testutils
import (
"fmt"
"io"
"os"
"os/user"
"strconv"
"testing"
)
// TestRootDir defines the root directory used by tests to write temporary test data
const TestRootDir string = ",scratch"
// SetupTest is the first function Go test framework calls when testing the 'datalayer' package.
// we do setup here.
func SetupTest() error {
//create a test directory
os.MkdirAll(TestRootDir, 0777)
// if test root directory is not empty, we bail out.
fp, err := os.Open(TestRootDir)
if err != nil {
fmt.Println("Error: could not open test directory", TestRootDir)
return err
}
defer fp.Close()
_, err = fp.Readdirnames(1)
if err != io.EOF {
fmt.Println("Error: expected empty test directory", TestRootDir,
" But it is either a file or a non-empty directory.")
return err
}
return nil
}
// ShutdownTest cleans up after running the tests
func ShutdownTest() {
//remove the contents of the test root directory. then create test rood dir again
os.RemoveAll(TestRootDir)
}
// RunningAsRoot returns true if it is running as a super user
func RunningAsRoot() bool {
//are we running as root
usr, err := user.Current()
if err != nil {
fmt.Println("Failed to get current user with the following error:", err)
return false
}
uid, err := strconv.Atoi(usr.Uid)
if err != nil {
fmt.Println("Failed to get uid with the following error:", err)
return false
}
gid, err := strconv.Atoi(usr.Gid)
if err != nil {
fmt.Println("Failed to get gid with the following error:", err)
return false
}
return uid == 0 && gid == 0
}
// MainTestEntry is the main test function that gets called.
// it performs setup, runs tests, and if they passed, performs the teardown.
func MainTestEntry(m *testing.M) {
//setup
fmt.Println("Setting up")
err := SetupTest()
if err != nil {
fmt.Println("Setup failed with the following error:", err, "\nExiting.")
os.Exit(1)
}
//run all tests
retCode := m.Run()
fmt.Println("Tests finished running. Exit code is", retCode)
//shutdown
if retCode == 0 {
fmt.Println("Performing cleanup.")
ShutdownTest()
} else {
fmt.Println("Not cleaning up because tests failed.")
}
os.Exit(retCode)
}