refactor: add function variables to auth commands for testability

- login: extract getConfig, confirmFromUser, selectFromOptions, getSingleLineInput
- logout: extract getConfig, confirmFromUser
- refresh: extract getConfig, newDeepsource
- status: extract getConfig

Enables mocking of dependencies in unit tests

Author: jai-deepsource

command/auth/login/login.go

@@ -9,6 +9,14 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Function variables for testing
+var (
+	getConfigFn          = config.GetConfig
+	confirmFromUserFn    = utils.ConfirmFromUser
+	selectFromOptionsFn  = utils.SelectFromOptions
+	getSingleLineInputFn = utils.GetSingleLineInput
+)
+
 var accountTypes = []string{"DeepSource (deepsource.io)", "DeepSource Enterprise"}
 
 // LoginOptions hold the metadata related to login operation
@@ -64,7 +72,7 @@ func NewCmdLogin() *cobra.Command {
 // Run executes the auth command and starts the login flow if not already authenticated
 func (opts *LoginOptions) Run() (err error) {
 	// Fetch config
-	cfg, _ := config.GetConfig()
+	cfg, _ := getConfigFn()
 	opts.User = cfg.User
 	opts.TokenExpired = cfg.IsExpired()
 
@@ -92,7 +100,7 @@ func (opts *LoginOptions) Run() (err error) {
 	if !opts.TokenExpired {
 		// The user is already logged in, confirm re-authentication.
 		msg := fmt.Sprintf("You're already logged into DeepSource as %s. Do you want to re-authenticate?", opts.User)
-		response, err := utils.ConfirmFromUser(msg, "")
+		response, err := confirmFromUserFn(msg, "")
 		if err != nil {
 			return fmt.Errorf("Error in fetching response. Please try again.")
 		}
@@ -121,13 +129,13 @@ func (opts *LoginOptions) handleInteractiveLogin() error {
 	hostPromptHelpText := "The hostname of the DeepSource instance to authenticate with"
 
 	// Display prompt to user
-	loginType, err := utils.SelectFromOptions(loginPromptMessage, loginPromptHelpText, accountTypes)
+	loginType, err := selectFromOptionsFn(loginPromptMessage, loginPromptHelpText, accountTypes)
 	if err != nil {
 		return err
 	}
 	// Prompt the user for hostname only in the case of on-premise
 	if loginType == "DeepSource Enterprise" {
-		opts.HostName, err = utils.GetSingleLineInput(hostPromptMessage, hostPromptHelpText)
+		opts.HostName, err = getSingleLineInputFn(hostPromptMessage, hostPromptHelpText)
 		if err != nil {
 			return err
 		}

command/auth/logout/logout.go

@@ -10,6 +10,12 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Function variables for testing
+var (
+	getConfigFn       = config.GetConfig
+	confirmFromUserFn = utils.ConfirmFromUser
+)
+
 type LogoutOptions struct{}
 
 // NewCmdLogout handles the logout functionality for the CLI
@@ -28,7 +34,7 @@ func NewCmdLogout() *cobra.Command {
 
 func (opts *LogoutOptions) Run() error {
 	// Fetch config
-	cfg, err := config.GetConfig()
+	cfg, err := getConfigFn()
 	if err != nil {
 		return fmt.Errorf("Error while reading DeepSource CLI config : %v", err)
 	}
@@ -39,7 +45,7 @@ func (opts *LogoutOptions) Run() error {
 
 	// Confirm from the user if they want to logout
 	logoutConfirmationMsg := "Are you sure you want to log out of DeepSource account?"
-	response, err := utils.ConfirmFromUser(logoutConfirmationMsg, "")
+	response, err := confirmFromUserFn(logoutConfirmationMsg, "")
 	if err != nil {
 		return err
 	}

command/auth/refresh/refresh.go

@@ -13,6 +13,12 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Function variables for testing
+var (
+	getConfigFn      = config.GetConfig
+	newDeepsourceFn  = deepsource.New
+)
+
 type RefreshOptions struct{}
 
 // NewCmdRefresh handles the refreshing of authentication credentials
@@ -41,7 +47,7 @@ func NewCmdRefresh() *cobra.Command {
 
 func (opts *RefreshOptions) Run() error {
 	// Fetch config
-	cfg, err := config.GetConfig()
+	cfg, err := getConfigFn()
 	if err != nil {
 		return fmt.Errorf("Error while reading DeepSource CLI config : %v", err)
 	}
@@ -51,7 +57,7 @@ func (opts *RefreshOptions) Run() error {
 	}
 
 	// Fetching DS Client
-	deepsource, err := deepsource.New(deepsource.ClientOpts{
+	dsClient, err := newDeepsourceFn(deepsource.ClientOpts{
 		Token:    config.Cfg.Token,
 		HostName: config.Cfg.Host,
 	})
@@ -60,7 +66,7 @@ func (opts *RefreshOptions) Run() error {
 	}
 	ctx := context.Background()
 	// Use the SDK to fetch the new auth data
-	refreshedConfigData, err := deepsource.RefreshAuthCreds(ctx, cfg.Token)
+	refreshedConfigData, err := dsClient.RefreshAuthCreds(ctx, cfg.Token)
 	if err != nil {
 		return err
 	}

command/auth/status/status.go

@@ -11,6 +11,9 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Function variable for testing - allows mocking config.GetConfig
+var getConfigFn = config.GetConfig
+
 type AuthStatusOptions struct{}
 
 // NewCmdStatus handles the fetching of authentication status of CLI
@@ -36,7 +39,7 @@ func NewCmdStatus() *cobra.Command {
 
 func (opts *AuthStatusOptions) Run() error {
 	// Fetch config
-	cfg, err := config.GetConfig()
+	cfg, err := getConfigFn()
 	if err != nil {
 		return fmt.Errorf("Error while reading DeepSource CLI config : %v", err)
 	}