fix: Accept both pip_pre and uv_resolution (#204)

Author: effigies

src/tox_uv/_installer.py

@@ -78,14 +78,12 @@ def post_process_install_command(self, cmd: Command) -> Command:
             if uv_resolution:
                 install_command.extend(("--resolution", uv_resolution))
         else:
+            opts: list[str] = []
             if pip_pre:
-                install_command[opts_at] = "--prerelease"
-                install_command.insert(opts_at + 1, "allow")
+                opts.extend(("--prerelease", "allow"))
             if uv_resolution:
-                install_command[opts_at] = "--resolution"
-                install_command.insert(opts_at + 1, uv_resolution)
-            if not (pip_pre or uv_resolution):
-                install_command.pop(opts_at)
+                opts.extend(("--resolution", uv_resolution))
+            install_command[opts_at : opts_at + 1] = opts
         return cmd
 
     def install(self, arguments: Any, section: str, of_type: str) -> None:  # noqa: ANN401

tests/test_tox_uv_installer.py

@@ -99,3 +99,27 @@ def test_uv_install_with_resolution_strategy_custom_install_cmd(tox_project: Tox
     result.assert_success()
 
     assert execute_calls.call_args[0][3].cmd[2:] == ["install", "tomli>=2.0.1", "--resolution", "lowest-direct"]
+
+
+def test_uv_install_with_resolution_strategy_and_pip_pre(tox_project: ToxProjectCreator) -> None:
+    project = tox_project({
+        "tox.ini": """
+    [testenv]
+    deps = tomli>=2.0.1
+    package = skip
+    uv_resolution = lowest-direct
+    pip_pre = true
+    """
+    })
+    execute_calls = project.patch_execute(lambda r: 0 if "install" in r.run_id else None)
+    result = project.run("-vv")
+    result.assert_success()
+    assert execute_calls.call_args[0][3].cmd[2:] == [
+        "install",
+        "--prerelease",
+        "allow",
+        "--resolution",
+        "lowest-direct",
+        "tomli>=2.0.1",
+        "-v",
+    ]