UTILS: Add utility pkg for helper functions.

utils/utils.go

@@ -0,0 +1,7 @@
+package utils
+
+import "path/filepath"
+
+func ExtractFileExt(path string) string {
+	return filepath.Ext(path)
+}

utils/utils_test.go

@@ -0,0 +1,30 @@
+package utils
+
+import "testing"
+
+const (
+	filePath    = "/home/test/file.mp4"
+	dirPath     = "/home/test"
+	diffDirPath = "/home/test.movies/"
+)
+
+func TestUtils(t *testing.T) {
+	tests := []struct {
+		input          string
+		expectedOutput string
+	}{
+		{"/home/test/movie.mp4", ".mp4"},
+		{"/home/test/movie.maaaap4.aaa.mp4", ".mp4"},
+		{"/home/test/", ""},
+		{"/home/test", ""},
+		{"/home/test/movie.mp4/", ""},
+	}
+
+	for _, tt := range tests {
+		got := ExtractFileExt(tt.input)
+
+		if got != tt.expectedOutput {
+			t.Errorf("Failed extracting file extention: got=%s, want=%s", got, tt.expectedOutput)
+		}
+	}
+}