test(uv): multi-version preference

e2e/MODULE.bazel

@@ -346,6 +346,19 @@ uv.unstable_annotate_packages(
 )
 # }}}
 
+# For cases/uv-include-group-versions (PEP 735 include-group version preference)
+# {{{
+uv.project(
+    hub_name = "pypi",
+    lock = "//cases/uv-include-group-versions:uv.lock",
+    pyproject = "//cases/uv-include-group-versions:pyproject.toml",
+)
+uv.unstable_annotate_packages(
+    src = "//cases/uv-legacy-deps-750:annotations.toml",
+    lock = "//cases/uv-include-group-versions:uv.lock",
+)
+# }}}
+
 # For cases/uv-abi3-compat-853
 # Regression: abi3 wheel compatibility must propagate to newer Python minors.
 # {{{

e2e/cases/uv-include-group-versions/BUILD.bazel

@@ -0,0 +1,20 @@
+load("@aspect_rules_py//py/unstable:defs.bzl", "py_venv_test")
+
+py_venv_test(
+    name = "include_group_versions_build",
+    srcs = ["__test__.py"],
+    main = "__test__.py",
+    python_version = "3.10",
+    venv = "igv-build",
+    deps = ["@pypi//packaging"],
+)
+
+py_venv_test(
+    name = "include_group_versions_test",
+    srcs = ["__test__.py"],
+    args = ["igv-test"],
+    main = "__test__.py",
+    python_version = "3.10",
+    venv = "igv-test",
+    deps = ["@pypi//packaging"],
+)

e2e/cases/uv-include-group-versions/__test__.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""Test that PEP 735 include-group version preferences are preserved.
+
+This project declares two pairs of conflicting dependency groups:
+- igv-build-base / igv-build use packaging==24.0
+- igv-test-base / igv-test use packaging==21.3
+
+Each outer group includes its base group via {include-group = ...}. uv.lock
+records a different packaging version for each group. This test verifies that
+rules_py installs the per-group version selected by uv.lock.
+"""
+
+import sys
+from importlib.metadata import version
+
+GROUPS = {
+    "igv-build": "24.0",
+    "igv-test": "21.3",
+}
+
+
+def main():
+    group = sys.argv[1] if len(sys.argv) > 1 else "igv-build"
+    expected = GROUPS[group]
+    actual = version("packaging")
+    print(f"{group}/packaging: {actual} (expected {expected})")
+    assert actual == expected, (
+        f"Expected packaging=={expected} for {group} group, got {actual}"
+    )
+
+
+if __name__ == "__main__":
+    main()

e2e/cases/uv-include-group-versions/pyproject.toml

@@ -0,0 +1,19 @@
+[project]
+name = "include-group-versions-test"
+version = "0.0.0"
+requires-python = "== 3.10.19"
+dependencies = []
+
+[dependency-groups]
+igv-build-base = ["packaging==24.0"]
+igv-test-base = ["packaging==21.3"]
+igv-build = [{include-group = "igv-build-base"}]
+igv-test = [{include-group = "igv-test-base"}]
+
+[tool.uv]
+conflicts = [
+    [{ group = "igv-build-base" }, { group = "igv-test-base" }],
+    [{ group = "igv-build" }, { group = "igv-test" }],
+    [{ group = "igv-build-base" }, { group = "igv-test" }],
+    [{ group = "igv-test-base" }, { group = "igv-build" }],
+]