Promote config.Config to an interface

Sooo, we can mock it during command testing. When testing is hard, mock
it so you look good in front of others and don't care about all the
shit and potential bugs it can slip through. But hey, tests!

cli/command.go

@@ -8,7 +8,7 @@ import (
 )
 
 // CommandFn represents a command handler function.
-type CommandFn func(Args, *config.Config)
+type CommandFn func(Args, config.Config)
 
 // Command represents a command line action.
 type Command struct {

cli/command_test.go

@@ -7,22 +7,22 @@ import (
 )
 
 func TestDispatchCommand(t *testing.T) {
-	RegisterCommand("test", "A testing command.", func(Args, *config.Config) {})
+	RegisterCommand("test", "A testing command.", func(Args, config.Config) {})
 
 	args := Args([]string{"test"})
 	if _, err := DispatchCommand(args, "default"); err == nil {
 		t.Errorf("Expected an error on missing registered default command")
 	}
 
-	RegisterCommand("default", "A testing command.", func(Args, *config.Config) {})
+	RegisterCommand("default", "A testing command.", func(Args, config.Config) {})
 
 	if command, _ := DispatchCommand(args, "default"); command.Name != "test" {
 		t.Errorf("Expected test command to be dispatched and executed")
 	}
 }
 
 func TestCommandIsOption(t *testing.T) {
-	command := &Command{"--test", "Testing command.", func(Args, *config.Config) {}}
+	command := &Command{"--test", "Testing command.", func(Args, config.Config) {}}
 
 	if !command.IsOption() {
 		t.Errorf("Expected --test command to be an option")

cmd/cd.go

@@ -13,7 +13,7 @@ import (
 const proximity = 5
 const osSeparator = string(os.PathSeparator)
 
-func cdCmd(args cli.Args, conf *config.Config) {
+func cdCmd(args cli.Args, conf config.Config) {
 	term := args.CommandName()
 	entries, err := conf.ReadEntries()
 

cmd/chdir.go

@@ -9,7 +9,7 @@ import (
 	"github.com/gsamokovarov/jump/scoring"
 )
 
-func updateCmd(args cli.Args, conf *config.Config) {
+func updateCmd(args cli.Args, conf config.Config) {
 	dir, err := os.Getwd()
 	if len(args) == 0 && err != nil {
 		cli.Exitf(1, "err: %s\n", err)

cmd/clean.go

@@ -8,7 +8,7 @@ import (
 	"github.com/gsamokovarov/jump/scoring"
 )
 
-func cleanCmd(args cli.Args, conf *config.Config) {
+func cleanCmd(args cli.Args, conf config.Config) {
 	entries, err := conf.ReadEntries()
 	if err != nil {
 		cli.Exitf(1, "%s\n", err)

cmd/help.go

@@ -19,7 +19,7 @@ Options:{{range .Options}}
   {{printf "%-12s %s" .Name .Desc}}{{end}}
 `
 
-func helpCmd(cli.Args, *config.Config) {
+func helpCmd(cli.Args, config.Config) {
 	tmpl := template.Must(template.New("--help").Parse(helpUsage))
 	tmpl.Execute(os.Stderr, cli.Registry)
 }

cmd/hint.go

@@ -8,7 +8,7 @@ import (
 	"github.com/gsamokovarov/jump/scoring"
 )
 
-func hintCmd(args cli.Args, conf *config.Config) {
+func hintCmd(args cli.Args, conf config.Config) {
 	var hints scoring.Entries
 
 	term := args.CommandName()

cmd/pin.go

@@ -13,7 +13,7 @@ var pinUsageMsg = `jump pin term [directory]
   No term specified. See the signature of the pin call above.
 `
 
-func pinCmd(args cli.Args, conf *config.Config) {
+func pinCmd(args cli.Args, conf config.Config) {
 	var err error
 
 	term := args.CommandName()

cmd/shell.go

@@ -8,7 +8,7 @@ import (
 	"github.com/gsamokovarov/jump/shell"
 )
 
-func shellCmd(args cli.Args, _ *config.Config) {
+func shellCmd(args cli.Args, _ config.Config) {
 	hint := args.CommandName()
 	if len(hint) == 0 {
 		hint = os.Getenv("SHELL")

cmd/top.go

@@ -7,7 +7,7 @@ import (
 	"github.com/gsamokovarov/jump/config"
 )
 
-func topCmd(args cli.Args, conf *config.Config) {
+func topCmd(args cli.Args, conf config.Config) {
 	entries, err := conf.ReadEntries()
 	if err != nil {
 		cli.Exitf(1, "%s\n", err)

cmd/version.go

@@ -7,7 +7,7 @@ import (
 
 const version = "0.11.0"
 
-func versionCmd(cli.Args, *config.Config) {
+func versionCmd(cli.Args, config.Config) {
 	cli.Outf("%s\n", version)
 }
 

config/config.go

@@ -4,6 +4,8 @@ import (
 	"os"
 	"os/user"
 	"path/filepath"
+
+	"github.com/gsamokovarov/jump/scoring"
 )
 
 const (
@@ -15,7 +17,18 @@ const (
 
 // Config represents the config directory and all the miscellaneous
 // configuration files we can have in there.
-type Config struct {
+type Config interface {
+	ReadEntries() (*scoring.Entries, error)
+	WriteEntries(*scoring.Entries) error
+
+	ReadSearch() Search
+	WriteSearch(string, int) error
+
+	FindPin(string) (string, bool)
+	WritePin(string, string) error
+}
+
+type fileConfig struct {
 	Dir    string
 	Scores string
 	Search string
@@ -26,7 +39,7 @@ type Config struct {
 //
 // If the directories don't already exists, they are created and if the score
 // file is present, it is loaded.
-func Setup(dir string) (*Config, error) {
+func Setup(dir string) (Config, error) {
 	// We get the directory check for free form os.MkdirAll.
 	if err := os.MkdirAll(dir, 0755); err != nil {
 		return nil, err
@@ -36,13 +49,13 @@ func Setup(dir string) (*Config, error) {
 	search := filepath.Join(dir, defaultSearchFile)
 	pins := filepath.Join(dir, defaultPinsFile)
 
-	return &Config{dir, scores, search, pins}, nil
+	return &fileConfig{dir, scores, search, pins}, nil
 }
 
 // SetupDefault setups the config folder from a directory path.
 //
 // If the directory path is an empty string, the path is automatically guessed.
-func SetupDefault(dir string) (*Config, error) {
+func SetupDefault(dir string) (Config, error) {
 	dir, err := normalizeDir(dir)
 	if err != nil {
 		return nil, err

config/entries.go

@@ -8,7 +8,7 @@ import (
 // ReadEntries returns the current entries for the config.
 //
 // If the scores file is empty, the returned entries are empty.
-func (c *Config) ReadEntries() (*scoring.Entries, error) {
+func (c *fileConfig) ReadEntries() (*scoring.Entries, error) {
 	var entries scoring.Entries
 
 	scoresFile, err := createOrOpenLockedFile(c.Scores)
@@ -28,7 +28,7 @@ func (c *Config) ReadEntries() (*scoring.Entries, error) {
 // WriteEntries the input scoring entries to a file.
 //
 // Sorts the entries before writing them to disk.
-func (c *Config) WriteEntries(entries *scoring.Entries) error {
+func (c *fileConfig) WriteEntries(entries *scoring.Entries) error {
 	scoresFile, err := createOrOpenLockedFile(c.Scores)
 	if err != nil {
 		return err

config/pin.go

@@ -7,7 +7,7 @@ import (
 // FindPin tries to the directory from a pinned search term.
 //
 // If no search pinned search term is found.
-func (c *Config) FindPin(term string) (dir string, found bool) {
+func (c *fileConfig) FindPin(term string) (dir string, found bool) {
 	pinsFile, err := createOrOpenLockedFile(c.Pins)
 	if err != nil {
 		return
@@ -24,7 +24,7 @@ func (c *Config) FindPin(term string) (dir string, found bool) {
 }
 
 // WritePin saves a pinned search term into a file.
-func (c *Config) WritePin(pin, value string) error {
+func (c *fileConfig) WritePin(pin, value string) error {
 	pinsFile, err := createOrOpenLockedFile(c.Pins)
 	if err != nil {
 		return err

config/search.go

@@ -14,7 +14,7 @@ type Search struct {
 // ReadSearch reads the last saved search entry.
 //
 // If the last search doesn't exist, a zero value Search is returned.
-func (c *Config) ReadSearch() (search Search) {
+func (c *fileConfig) ReadSearch() (search Search) {
 	searchFile, err := createOrOpenLockedFile(c.Search)
 	if err != nil {
 		return
@@ -28,7 +28,7 @@ func (c *Config) ReadSearch() (search Search) {
 }
 
 // WriteSearch writes the last search entry to the current search entry.
-func (c *Config) WriteSearch(term string, index int) error {
+func (c *fileConfig) WriteSearch(term string, index int) error {
 	searchFile, err := createOrOpenLockedFile(c.Search)
 	if err != nil {
 		return err