ci: Test for unused dependencies

Adds a test for unused cargo dependencies.

Signed-off-by: Jonathan Woollett-Light <[email protected]>

tests/integration_tests/build/test_dependencies.py

@@ -6,6 +6,7 @@
 
 import pytest
 
+from framework import utils
 from host_tools import proc
 from host_tools.cargo_build import cargo
 
@@ -25,3 +26,13 @@ def test_licenses():
     )
 
     cargo("deny", f"--manifest-path {toml_file} check licenses bans")
+
+
+@pytest.mark.timeout(600)
+def test_unused_dependencies():
+    """
+    Test that there are no unused dependencies.
+    """
+    utils.run_cmd("cargo install cargo-udeps")
+
+    utils.run_cmd("cargo +nightly udeps")