Added unit test for cli

Author: ritwik-g

tests/unit/test_cli.py

@@ -0,0 +1,22 @@
+"""Tests for the command line interface."""
+
+from typer.testing import CliRunner
+
+from helm_values_manager.cli import app
+
+runner = CliRunner()
+
+
+def test_main_no_command():
+    """Test main function without any subcommand."""
+    result = runner.invoke(app)
+    assert result.exit_code == 0
+    assert "Usage: helm values-manager" in result.stdout
+
+
+def test_init_command():
+    """Test init command."""
+    result = runner.invoke(app, ["init", "--release", "test-release"])
+    assert result.exit_code == 0
+    assert "Initializing values manager" in result.stdout
+    assert "test-release" in result.stdout