Yarn Berry: add missing config key to parse yarnrc tests

The "lockfileFilename" .yarnrc.yml option is used by Cachi2 and it also
has a default set, so it needs to be properly tested.

Signed-off-by: Bruno Pimentel <[email protected]>

tests/unit/package_managers/yarn/test_project.py

@@ -31,6 +31,7 @@
 globalFolder: /a/global/folder
 ignorePath: true
 installStatePath: /custom/install-state.gz
+lockfileFilename: custom.lock
 nodeLinker: pnp
 npmRegistryServer: https://registry.alternative.com
 npmScopes:
@@ -98,6 +99,7 @@ def test_parse_yarnrc(rooted_tmp_path: RootedPath) -> None:
     assert yarn_rc["globalFolder"] == "/a/global/folder"
     assert yarn_rc["ignorePath"] is True
     assert yarn_rc["installStatePath"] == "/custom/install-state.gz"
+    assert yarn_rc["lockfileFilename"] == "custom.lock"
     assert yarn_rc["nodeLinker"] == "pnp"
     assert yarn_rc["patchFolder"] == "/custom/patches"
     assert yarn_rc["pnpDataPath"] == "/custom/.pnp.data.json"
@@ -117,26 +119,7 @@ def test_parse_empty_yarnrc(rooted_tmp_path: RootedPath) -> None:
 
     # assert defaults are available
     assert yarn_rc["cacheFolder"] == "./.yarn/cache"
-    assert yarn_rc["checksumBehavior"] is None
-    assert yarn_rc["enableGlobalCache"] is None
-    assert yarn_rc["enableImmutableCache"] is None
-    assert yarn_rc["enableImmutableInstalls"] is None
-    assert yarn_rc["enableMirror"] is None
-    assert yarn_rc["enableScripts"] is None
-    assert yarn_rc["enableStrictSsl"] is None
-    assert yarn_rc["enableTelemetry"] is None
-    assert yarn_rc["globalFolder"] is None
-    assert yarn_rc["ignorePath"] is None
-    assert yarn_rc["installStatePath"] is None
-    assert yarn_rc["nodeLinker"] is None
-    assert yarn_rc["patchFolder"] is None
-    assert yarn_rc["pnpDataPath"] is None
-    assert yarn_rc["pnpMode"] is None
-    assert yarn_rc["pnpUnpluggedFolder"] is None
-    assert yarn_rc["npmRegistryServer"] is None
-    assert yarn_rc["unsafeHttpWhitelist"] is None
-    assert yarn_rc["yarnPath"] is None
-    assert yarn_rc["virtualFolder"] is None
+    assert yarn_rc["lockfileFilename"] == "yarn.lock"
 
 
 def test_parse_invalid_yarnrc(rooted_tmp_path: RootedPath) -> None: