✨ add continuous testing workflow for running against the latest Qisk…

…it main branch

Signed-off-by: burgholzer <burgholzer@me.com>

.github/workflows/upstream.yml

@@ -0,0 +1,20 @@
+name: Qiskit Upstream Tests
+on:
+  schedule:
+    # Run every Monday at 00:00 UTC
+    - cron: "0 0 * * 1"
+  pull_request:
+    paths:
+      - ".github/workflows/upstream.yml"
+  workflow_dispatch: # Allow manual triggering
+
+jobs:
+  qiskit-upstream-tests:
+    name: 🐍⚛️
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-24.04, macos-15, windows-2025]
+    uses: cda-tum/mqt-workflows/.github/workflows/reusable-qiskit-upstream.yml@v1.7
+    with:
+      runs-on: ${{ matrix.os }}

noxfile.py

@@ -45,7 +45,8 @@ def _run_tests(
     session: nox.Session,
     *,
     install_args: Sequence[str] = (),
-    run_args: Sequence[str] = (),
+    uv_run_args: Sequence[str] = (),
+    pytest_run_args: Sequence[str] = (),
 ) -> None:
     env = {"UV_PROJECT_ENVIRONMENT": session.virtualenv.location}
     if os.environ.get("CI", None) and sys.platform == "win32":
@@ -77,8 +78,9 @@ def _run_tests(
         "mqt-core",  # build the project without isolation
         "--verbose",
         *install_args,
+        *uv_run_args,
         "pytest",
-        *run_args,
+        *pytest_run_args,
         *session.posargs,
         "--cov-config=pyproject.toml",
         env=env,
@@ -97,13 +99,19 @@ def minimums(session: nox.Session) -> None:
     _run_tests(
         session,
         install_args=["--resolution=lowest-direct"],
-        run_args=["-Wdefault"],
+        pytest_run_args=["-Wdefault"],
     )
     env = {"UV_PROJECT_ENVIRONMENT": session.virtualenv.location}
     session.run("uv", "tree", "--frozen", env=env)
     session.run("uv", "lock", "--refresh", env=env)
 
 
+@nox.session(reuse_venv=True, venv_backend="uv", python=PYTHON_ALL_VERSIONS)
+def qiskit(session: nox.Session) -> None:
+    """Tests against the latest version of Qiskit."""
+    _run_tests(session, uv_run_args=["--with", "qiskit @ git+https://github.com/Qiskit/qiskit.git"])
+
+
 @nox.session(reuse_venv=True)
 def docs(session: nox.Session) -> None:
     """Build the docs. Use "--non-interactive" to avoid serving. Pass "-b linkcheck" to check links."""