test(config,git,logger): add some test functions

internal/config/config.go

@@ -7,6 +7,15 @@ import (
 	"github.com/rs/zerolog"
 )
 
+var (
+	ErrInvalidGrafanaURL = errors.New("invalid grafana URL, must not be blank")
+	ErrInvalidAuthToken  = errors.New("invalid auth token for grafana, must not be blank")
+	ErrInvalidRepoURL    = errors.New("invalid repo url for git, must not be blank")
+	ErrInvalidGitUser    = errors.New("invalid username for git, must not be blank")
+	ErrInvalidGitPass    = errors.New("invalid password for git, must not be blank")
+	ErrInvalidBranchName = errors.New("invalid branch name for git, must not be blank")
+)
+
 type Config struct {
 	Debug        bool
 	ForceCommits bool
@@ -29,27 +38,27 @@ func (c *Config) Validate() []error {
 	var errs []error
 
 	if c.GrafanaURL == "" {
-		errs = append(errs, errors.New("invalid grafana URL, must not be blank"))
+		errs = append(errs, ErrInvalidGrafanaURL)
 	}
 
 	if c.GrafanaToken == "" {
-		errs = append(errs, errors.New("invalid auth token for grafana, must not be blank"))
+		errs = append(errs, ErrInvalidAuthToken)
 	}
 
 	if c.GitRepo == "" {
-		errs = append(errs, errors.New("invalid repo url for git, must not be blank"))
+		errs = append(errs, ErrInvalidRepoURL)
 	}
 
 	if c.GitUser == "" {
-		errs = append(errs, errors.New("invalid username for git, must not be blank"))
+		errs = append(errs, ErrInvalidGitUser)
 	}
 
 	if c.GitPass == "" {
-		errs = append(errs, errors.New("invalid password for git, must not be blank"))
+		errs = append(errs, ErrInvalidGitPass)
 	}
 
 	if c.GitBranch == "" {
-		errs = append(errs, errors.New("invalid branch name for git, must not be blank"))
+		errs = append(errs, ErrInvalidBranchName)
 	}
 
 	return errs