Improve test setup with test_helper.bash

tests/parser.bats

@@ -1,9 +1,7 @@
 #!/usr/bin/env bats
 
-# Load BATS helper libraries
-load 'test_helper/bats-support/load'
-load 'test_helper/bats-assert/load'
-load 'test_helper/bats-file/load'
+# Load test helper
+load 'test_helper'
 
 # Simple test for parse_volume function
 @test "parse_volume should parse volume string correctly" {

tests/test_helper.bash

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# Set the path to the BATS helpers
+export BATS_HELPER_PATH="${BATS_TEST_DIRNAME}/test_helper"
+
+# Load BATS helper libraries
+load "${BATS_HELPER_PATH}/bats-support/load.bash"
+load "${BATS_HELPER_PATH}/bats-assert/load.bash"
+load "${BATS_HELPER_PATH}/bats-file/load.bash"
+
+# Setup function that runs before each test
+setup() {
+  # Add any test setup code here
+  :
+}
+
+# Teardown function that runs after each test
+teardown() {
+  # Add any test teardown code here
+  :
+}