cmd: Add tests

This commit is contained in:
Albert Nigmatzianov 2017-05-05 10:06:27 +02:00
parent d20925b932
commit 76a9a66775
8 changed files with 607 additions and 1 deletions

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package cmd package cmd
import "testing" import (
"errors"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
// TestGoldenAddCmd initializes the project "github.com/spf13/testproject"
// in GOPATH, adds "test" command
// and compares the content of all files in cmd directory of testproject
// with appropriate golden files.
// Use -update to update existing golden files.
func TestGoldenAddCmd(t *testing.T) {
projectName := "github.com/spf13/testproject"
project := NewProject(projectName)
// Initialize the project at first.
initializeProject(project)
defer os.RemoveAll(project.AbsPath())
// Then add the "test" command.
cmdName := "test"
cmdPath := filepath.Join(project.CmdPath(), cmdName+".go")
createCmdFile(project.License(), cmdPath, cmdName)
expectedFiles := []string{".", "root.go", "test.go"}
gotFiles := []string{}
// Check project file hierarchy and compare the content of every single file
// with appropriate golden file.
err := filepath.Walk(project.CmdPath(), func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// Make path relative to project.CmdPath().
// E.g. path = "/home/user/go/src/github.com/spf13/testproject/cmd/root.go"
// then it returns just "root.go".
relPath, err := filepath.Rel(project.CmdPath(), path)
if err != nil {
return err
}
relPath = filepath.ToSlash(relPath)
gotFiles = append(gotFiles, relPath)
goldenPath := filepath.Join("testdata", filepath.Base(path)+".golden")
switch relPath {
// Know directories.
case ".":
return nil
// Known files.
case "root.go", "test.go":
if *update {
got, err := ioutil.ReadFile(path)
if err != nil {
return err
}
ioutil.WriteFile(goldenPath, got, 0644)
}
return compareFiles(path, goldenPath)
}
// Unknown file.
return errors.New("unknown file: " + path)
})
if err != nil {
t.Fatal(err)
}
// Check if some files lack.
if err := checkLackFiles(expectedFiles, gotFiles); err != nil {
t.Fatal(err)
}
}
func TestValidateCmdName(t *testing.T) { func TestValidateCmdName(t *testing.T) {
testCases := []struct { testCases := []struct {

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cobra/cmd/golden_test.go Normal file
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package cmd
import (
"bytes"
"errors"
"flag"
"fmt"
"io/ioutil"
"os/exec"
)
var update = flag.Bool("update", false, "update .golden files")
func init() {
// Mute commands.
addCmd.SetOutput(new(bytes.Buffer))
initCmd.SetOutput(new(bytes.Buffer))
}
// compareFiles compares the content of files with pathA and pathB.
// If contents are equal, it returns nil.
// If not, it returns which files are not equal
// and diff (if system has diff command) between these files.
func compareFiles(pathA, pathB string) error {
contentA, err := ioutil.ReadFile(pathA)
if err != nil {
return err
}
contentB, err := ioutil.ReadFile(pathB)
if err != nil {
return err
}
if !bytes.Equal(contentA, contentB) {
output := new(bytes.Buffer)
output.WriteString(fmt.Sprintf("%q and %q are not equal!\n\n", pathA, pathB))
diffPath, err := exec.LookPath("diff")
if err != nil {
// Don't execute diff if it can't be found.
return nil
}
diffCmd := exec.Command(diffPath, pathA, pathB)
diffCmd.Stdout = output
diffCmd.Stderr = output
output.WriteString("$ diff " + pathA + " " + pathB + "\n")
if err := diffCmd.Run(); err != nil {
output.WriteString("\n" + err.Error())
}
return errors.New(output.String())
}
return nil
}
// checkLackFiles checks if all elements of expected are in got.
func checkLackFiles(expected, got []string) error {
lacks := make([]string, 0, len(expected))
for _, ev := range expected {
if !stringInStringSlice(ev, got) {
lacks = append(lacks, ev)
}
}
if len(lacks) > 0 {
return fmt.Errorf("Lack %v file(s): %v", len(lacks), lacks)
}
return nil
}
// stringInStringSlice checks if s is an element of slice.
func stringInStringSlice(s string, slice []string) bool {
for _, v := range slice {
if s == v {
return true
}
}
return false
}

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cobra/cmd/init_test.go Normal file
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package cmd
import (
"errors"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
// TestGoldenInitCmd initializes the project "github.com/spf13/testproject"
// in GOPATH and compares the content of files in initialized project with
// appropriate golden files ("testdata/*.golden").
// Use -update to update existing golden files.
func TestGoldenInitCmd(t *testing.T) {
projectName := "github.com/spf13/testproject"
project := NewProject(projectName)
defer os.RemoveAll(project.AbsPath())
os.Args = []string{"cobra", "init", projectName}
if err := RootCmd.Execute(); err != nil {
t.Fatal("Error by execution:", err)
}
expectedFiles := []string{".", "cmd", "LICENSE", "main.go", "cmd/root.go"}
gotFiles := []string{}
// Check project file hierarchy and compare the content of every single file
// with appropriate golden file.
err := filepath.Walk(project.AbsPath(), func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// Make path relative to project.AbsPath().
// E.g. path = "/home/user/go/src/github.com/spf13/testproject/cmd/root.go"
// then it returns just "cmd/root.go".
relPath, err := filepath.Rel(project.AbsPath(), path)
if err != nil {
return err
}
relPath = filepath.ToSlash(relPath)
gotFiles = append(gotFiles, relPath)
goldenPath := filepath.Join("testdata", filepath.Base(path)+".golden")
switch relPath {
// Know directories.
case ".", "cmd":
return nil
// Known files.
case "LICENSE", "main.go", "cmd/root.go":
if *update {
got, err := ioutil.ReadFile(path)
if err != nil {
return err
}
ioutil.WriteFile(goldenPath, got, 0644)
}
return compareFiles(path, goldenPath)
}
// Unknown file.
return errors.New("unknown file: " + path)
})
if err != nil {
t.Fatal(err)
}
// Check if some files lack.
if err := checkLackFiles(expectedFiles, gotFiles); err != nil {
t.Fatal(err)
}
}

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cobra/cmd/project_test.go Normal file
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package cmd
import (
"path/filepath"
"testing"
)
func TestFindExistingPackage(t *testing.T) {
path := findPackage("github.com/spf13/cobra")
if path == "" {
t.Fatal("findPackage didn't find the existing package")
}
if !hasGoPathPrefix(path) {
t.Fatal("%q is not in GOPATH, but must be", path)
}
}
func hasGoPathPrefix(path string) bool {
for _, srcPath := range srcPaths {
if filepath.HasPrefix(path, srcPath) {
return true
}
}
return false
}

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cobra/cmd/testdata/LICENSE.golden vendored Normal file
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cobra/cmd/testdata/main.go.golden vendored Normal file
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// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
// 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 "github.com/spf13/testproject/cmd"
func main() {
cmd.Execute()
}

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cobra/cmd/testdata/root.go.golden vendored Normal file
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// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
// 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 cmd
import (
"fmt"
"os"
homedir "github.com/mitchellh/go-homedir"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var cfgFile string
// RootCmd represents the base command when called without any subcommands
var RootCmd = &cobra.Command{
Use: "testproject",
Short: "A brief description of your application",
Long: `A longer description that spans multiple lines and likely contains
examples and usage of using your application. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
// Uncomment the following line if your bare application
// has an action associated with it:
// Run: func(cmd *cobra.Command, args []string) { },
}
// Execute adds all child commands to the root command sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
if err := RootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func init() {
cobra.OnInitialize(initConfig)
// Here you will define your flags and configuration settings.
// Cobra supports persistent flags, which, if defined here,
// will be global for your application.
RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.testproject.yaml)")
// Cobra also supports local flags, which will only run
// when this action is called directly.
RootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}
// initConfig reads in config file and ENV variables if set.
func initConfig() {
if cfgFile != "" {
// Use config file from the flag.
viper.SetConfigFile(cfgFile)
} else {
// Find home directory.
home, err := homedir.Dir()
if err != nil {
fmt.Println(home)
os.Exit(1)
}
// Search config in home directory with name ".cobra" (without extension).
viper.AddConfigPath(home)
viper.SetConfigName(".cobra")
}
viper.AutomaticEnv() // read in environment variables that match
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
fmt.Println("Using config file:", viper.ConfigFileUsed())
}
}

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cobra/cmd/testdata/test.go.golden vendored Normal file
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// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
// 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 cmd
import (
"fmt"
"github.com/spf13/cobra"
)
// testCmd represents the test command
var testCmd = &cobra.Command{
Use: "test",
Short: "A brief description of your command",
Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
Run: func(cmd *cobra.Command, args []string) {
fmt.Println("test called")
},
}
func init() {
RootCmd.AddCommand(testCmd)
// Here you will define your flags and configuration settings.
// Cobra supports Persistent Flags which will work for this command
// and all subcommands, e.g.:
// testCmd.PersistentFlags().String("foo", "", "A help for foo")
// Cobra supports local flags which will only run when this command
// is called directly, e.g.:
// testCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}