Add test for $declared_deps usage

Summary: This shouldn't be allowed, will remove in the next diff

Reviewed By: iguridi

Differential Revision: D71477141

fbshipit-source-id: 901941070f49a9b551c29ad4ba20f744a77cf7a2

Author: Ian Childs

tests/core/query/cquery/test_cquery.py

@@ -265,3 +265,11 @@ async def test_disabling_of_execution_platforms(buck: Buck) -> None:
         query = "deps(set(tests/...))"
         await buck.cquery(query)
         await buck.cquery(query, "-c", "build.execution_platforms=")
+
+
+@buck_test(data_dir="deps_query")
+async def test_declared_deps_query(buck: Buck) -> None:
+    # TODO(ianc) This should fail
+    await buck.cquery(
+        "root//:declared_deps",
+    )

tests/core/query/cquery/test_cquery_data/deps_query/.buckconfig

@@ -0,0 +1,12 @@
+[buildfile]
+name=TARGETS.fixture
+
+[cells]
+root = .
+nano_prelude = nano_prelude
+
+[cell_aliases]
+prelude = nano_prelude
+
+[external_cells]
+nano_prelude = bundled

tests/core/query/cquery/test_cquery_data/deps_query/.buckroot

@@ -0,0 +1,6 @@
+load(":defs.bzl", "rule_with_query")
+
+rule_with_query(
+    name = "declared_deps",
+    query = "$declared_deps",
+)

tests/core/query/cquery/test_cquery_data/deps_query/TARGETS.fixture

@@ -0,0 +1,7 @@
+def _rule_with_query(ctx):
+    return [DefaultInfo()]
+
+rule_with_query = rule(
+    impl = _rule_with_query,
+    attrs = {"query": attrs.query()},
+)