test: add basic tests for shell integration helper

Author: Swaroop Manchala

tests/test_shell_integration.py

@@ -0,0 +1,11 @@
+from cortex.shell_integration import suggest_command
+
+
+def test_suggest_command_empty():
+    assert suggest_command("") is None
+
+
+def test_suggest_command_text():
+    # We only check that it does not crash
+    result = suggest_command("install docker")
+    assert result is None or isinstance(result, str)