Add basic integration tests

tests/test_integration.py

@@ -0,0 +1,103 @@
+import sys
+
+import pytest
+from pytest import MonkeyPatch
+from tox.pytest import ToxProjectCreator, init_fixture  # noqa: F401
+
+
+requires_cpython = pytest.mark.skipif(
+    sys.implementation.name != "cpython", reason="Requires CPython to run this test"
+)
+
+
+@pytest.mark.integration
+@requires_cpython
+def test_sunny_day_with_legacy_command(
+    monkeypatch: MonkeyPatch, tox_project: ToxProjectCreator
+) -> None:
+    monkeypatch.setenv("GITHUB_ACTIONS", "true")
+    monkeypatch.delenv("TOXENV", raising=False)
+    env = f"py{sys.version_info[0]}{sys.version_info[1]}"
+    version = f"{sys.version_info[0]}.{sys.version_info[1]}"
+    tox_ini = f"""
+[tox]
+envlist = dummy, {env}
+
+[testenv]
+package = skip
+
+[gh-actions]
+python =
+    2.6: dummy
+    {version}: {env}
+"""
+    project = tox_project({"tox.ini": tox_ini})
+
+    result = project.run()
+
+    result.assert_success()
+    assert f"py{sys.version_info[0]}{sys.version_info[1]}: OK" in result.out
+    assert "dummy" not in result.out
+
+
+@pytest.mark.integration
+@requires_cpython
+def test_sunny_day_with_run_command(
+    monkeypatch: MonkeyPatch, tox_project: ToxProjectCreator
+) -> None:
+    monkeypatch.setenv("GITHUB_ACTIONS", "true")
+    monkeypatch.delenv("TOXENV", raising=False)
+    env = f"py{sys.version_info[0]}{sys.version_info[1]}"
+    version = f"{sys.version_info[0]}.{sys.version_info[1]}"
+    tox_ini = f"""
+[tox]
+envlist = dummy, {env}
+
+[testenv]
+package = skip
+
+[gh-actions]
+python =
+    2.6: dummy
+    {version}: {env}
+"""
+    project = tox_project({"tox.ini": tox_ini})
+
+    result = project.run("run")
+
+    result.assert_success()
+    assert f"py{sys.version_info[0]}{sys.version_info[1]}: OK" in result.out
+    assert "dummy" not in result.out
+
+
+@pytest.mark.integration
+@requires_cpython
+def test_sunny_day_with_list_command(
+    monkeypatch: MonkeyPatch, tox_project: ToxProjectCreator
+) -> None:
+    monkeypatch.setenv("GITHUB_ACTIONS", "true")
+    monkeypatch.delenv("TOXENV", raising=False)
+    env = f"py{sys.version_info[0]}{sys.version_info[1]}"
+    version = f"{sys.version_info[0]}.{sys.version_info[1]}"
+    tox_ini = f"""
+[tox]
+envlist = dummy, {env}
+
+[testenv]
+package = skip
+
+[gh-actions]
+python =
+    2.6: dummy
+    {version}: {env}
+"""
+    project = tox_project({"tox.ini": tox_ini})
+
+    result = project.run("list")
+
+    result.assert_success()
+    assert [
+        "default environments:",
+        f"py{sys.version_info[0]}{sys.version_info[1]} -> [no description]",
+        "",
+    ] == result.out.splitlines()[:3]