Restructure project directories

Follow the standard of all go projects

internal/grm/utils_test.go

@@ -0,0 +1,84 @@
+package grm
+
+import (
+	"gitlab.com/revalus/grm/internal/config"
+	"reflect"
+	"testing"
+)
+
+func TestGetFileExtension(t *testing.T) {
+
+	toTest := map[string]string{
+		"myYamlFile.yaml": "yaml",
+		"myTxtFile.txt":   "txt",
+		"myJsonFile.json": "json",
+	}
+
+	for key, value := range toTest {
+		result, err := getFileExtension(key)
+
+		if err != nil {
+			t.Errorf("Unexpected error: %v", err)
+		}
+
+		if result != value {
+			t.Errorf("Expected to get %v, instead of this got %v", value, result)
+		}
+
+	}
+
+}
+
+func TestErrorInGetExcensionFile(t *testing.T) {
+
+	result, err := getFileExtension("test")
+
+	if err == nil {
+		t.Errorf("Expected to get error, instead of this got result %v", result)
+	}
+}
+
+func TestIsItemInSlice(t *testing.T) {
+	testedSlice := []string{"1", "2", "3", "4", "5"}
+
+	result := checkIsItemInSlice("0", testedSlice)
+	if result {
+		t.Error("Expected to get false as result")
+	}
+
+	result = checkIsItemInSlice("1", testedSlice)
+	if !result {
+		t.Error("Expected to get true as result")
+	}
+}
+
+func TestIsAnyInSlice(t *testing.T) {
+	testedSlice := []string{"1", "2", "3", "4", "5"}
+
+	result := checkAnyOfItemInSlice([]string{"0", "10"}, testedSlice)
+	if result {
+		t.Error("Expected to get false as result")
+	}
+
+	result = checkAnyOfItemInSlice([]string{"0", "5"}, testedSlice)
+	if !result {
+		t.Error("Expected to get true as result")
+	}
+}
+
+func TestReverseStringsSlice(t *testing.T) {
+	testedSlice := []config.RepositoryConfig{
+		{Name: "test1"},
+		{Name: "test2"},
+		{Name: "test3"},
+	}
+	expectedResult := []config.RepositoryConfig{
+		{Name: "test3"},
+		{Name: "test2"},
+		{Name: "test1"},
+	}
+	result := reverseRepositoryConfigs(testedSlice)
+	if !reflect.DeepEqual(result, expectedResult) {
+		t.Errorf("Expected to get \"%#v\", instead of this got \"%#v\"", expectedResult, result)
+	}
+}