package altsrc import ( "flag" "github.com/urfave/cli/v2" "io/ioutil" "os" "testing" ) const ( fileName = "current.json" simpleJSON = `{"test": 15}` nestedJSON = `{"top": {"test": 15}}` ) func TestCommandJSONFileTest(t *testing.T) { cleanup := writeTempFile(t, fileName, simpleJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("test") expect(t, val, 15) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "test"}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestGlobalEnvVarWins(t *testing.T) { cleanup := writeTempFile(t, fileName, simpleJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) _ = os.Setenv("THE_TEST", "10") defer os.Setenv("THE_TEST", "") test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("test") expect(t, val, 10) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "test", EnvVars: []string{"THE_TEST"}}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestGlobalEnvVarWinsNested(t *testing.T) { cleanup := writeTempFile(t, fileName, nestedJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) _ = os.Setenv("THE_TEST", "10") defer os.Setenv("THE_TEST", "") test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("top.test") expect(t, val, 10) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "top.test", EnvVars: []string{"THE_TEST"}}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestSpecifiedFlagWins(t *testing.T) { cleanup := writeTempFile(t, fileName, simpleJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) test := []string{"test-cmd", "--load", fileName, "--test", "7"} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("test") expect(t, val, 7) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "test"}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestSpecifiedFlagWinsNested(t *testing.T) { cleanup := writeTempFile(t, fileName, nestedJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) test := []string{"test-cmd", "--load", fileName, "--top.test", "7"} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("top.test") expect(t, val, 7) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "top.test"}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestDefaultValueFileWins(t *testing.T) { cleanup := writeTempFile(t, fileName, simpleJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("test") expect(t, val, 15) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "test", Value: 7}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileTestDefaultValueFileWinsNested(t *testing.T) { cleanup := writeTempFile(t, fileName, nestedJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("top.test") expect(t, val, 15) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileFlagHasDefaultGlobalEnvJSONSetGlobalEnvWins(t *testing.T) { cleanup := writeTempFile(t, fileName, simpleJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) _ = os.Setenv("THE_TEST", "11") defer os.Setenv("THE_TEST", "") test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("test") expect(t, val, 11) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "test", Value: 7, EnvVars: []string{"THE_TEST"}}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func TestCommandJSONFileFlagHasDefaultGlobalEnvJSONSetGlobalEnvWinsNested(t *testing.T) { cleanup := writeTempFile(t, fileName, nestedJSON) defer cleanup() app := &cli.App{} set := flag.NewFlagSet("test", 0) _ = os.Setenv("THE_TEST", "11") defer os.Setenv("THE_TEST", "") test := []string{"test-cmd", "--load", fileName} _ = set.Parse(test) c := cli.NewContext(app, set, nil) command := &cli.Command{ Name: "test-cmd", Aliases: []string{"tc"}, Usage: "this is for testing", Description: "testing", Action: func(c *cli.Context) error { val := c.Int("top.test") expect(t, val, 11) return nil }, Flags: []cli.Flag{ NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7, EnvVars: []string{"THE_TEST"}}), &cli.StringFlag{Name: "load"}}, } command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load")) err := command.Run(c) expect(t, err, nil) } func writeTempFile(t *testing.T, name string, content string) func() { if err := ioutil.WriteFile(name, []byte(content), 0666); err != nil { t.Fatalf("cannot write %q: %v", name, err) } return func() { if err := os.Remove(name); err != nil { t.Errorf("cannot remove %q: %v", name, err) } } }