add test for cache building

test-data/recipes/cache/recipe-cmake.yaml

@@ -0,0 +1,25 @@
+context:
+  version: 0.1.0
+  build_num: 0
+
+recipe:
+  name: cache-installation
+  version: ${{ version }}
+
+build:
+  number: ${{ build_num }}
+
+cache:
+  requirements:
+    build:
+      - cmake
+  build:
+    script:
+      - cmake --version
+
+outputs:
+  - package:
+      name: check-1
+
+  - package:
+      name: check-2

test/end-to-end/test_simple.py

@@ -956,3 +956,11 @@ def test_used_vars(rattler_build: RattlerBuild, recipes: Path, tmp_path: Path):
     assert rendered[0]["build_configuration"]["variant"] == {
         "target_platform": "noarch"
     }
+
+def test_cache_install(
+    rattler_build: RattlerBuild, recipes: Path, tmp_path: Path, snapshot_json
+):
+    rattler_build.build(recipes / "cache/recipe-cmake.yaml", tmp_path)
+
+    pkg1 = get_extracted_package(tmp_path, "check-1")
+    pkg2 = get_extracted_package(tmp_path, "check-2")