feat(internal/config): add config tests

Author: Wabri

internal/config/config.go

@@ -33,7 +33,8 @@ func LoadConfig() error {
 func getConfigFilePath() (string, error) {
 	for _, value := range constants.DajeConfigPathOrder {
 		currentFilepath := path.Join(constants.DajeBasePath, value, constants.DajeConfigFileName)
-		if _, err := os.Stat(currentFilepath); err == nil {
+		_, err := os.Stat(currentFilepath)
+		if err == nil {
 			return currentFilepath, nil
 		}
 	}

internal/config/config_test.go

@@ -1 +1,55 @@
 package config
+
+import (
+	"errors"
+	"os"
+	"path"
+	"testing"
+
+	"github.com/Schroedinger-Hat/Daje/constants"
+)
+
+const configNotExistsFileName = ".confignotexists"
+
+func Test_getConfigFilePathShouldPassWithNoErrorsWhenFindConfigurationFile(t *testing.T) {
+	workingDirectory, _ := os.Getwd()
+	constants.DajeBasePath = workingDirectory + "/../../testdata"
+
+	_, err := getConfigFilePath()
+
+	if err != nil {
+		t.Fatalf("getConfigFilePath should pass with no errors when find configuration file: expected=\"\" - get=\"%v\"", err)
+	}
+}
+
+func Test_getConfigFilePathShouldReturnTheExactPathWhenItFindTheConfigurationFile(t *testing.T) {
+	workingDirectory, _ := os.Getwd()
+	constants.DajeBasePath = workingDirectory + "/../../testdata"
+	expectedConfigPath := path.Join(constants.DajeBasePath, "../testdata/.config/daje", constants.DajeConfigFileName)
+
+	path, _ := getConfigFilePath()
+
+	if path != expectedConfigPath {
+		t.Fatalf("getConfigFilePath should return the exact path when find configuration file: expected=%v - get=%v", expectedConfigPath, path)
+	}
+}
+
+func Test_getConfigFilePathShouldFailWhenDontFindConfigurationFile(t *testing.T) {
+	constants.DajeConfigFileName = configNotExistsFileName
+
+	_, err := getConfigFilePath()
+	errExpected := errors.New("getConfigFilePath: Configuration not found")
+
+	if err.Error() != errExpected.Error() {
+		t.Fatalf("getConfigFilePath should fail when don't find configuration file: expected=%v - get=%v", errExpected, err)
+	}
+}
+
+func Test_getConfigFilePathShouldHaveEmptyPathWhenDontFindConfigurationFile(t *testing.T) {
+	constants.DajeConfigFileName = configNotExistsFileName
+	path, _ := getConfigFilePath()
+
+	if path != "" {
+		t.Fatalf("getConfigFilePath should have empty path when don't find configuration file: expected=\"\" - get=%v", path)
+	}
+}