chore: add unit test nox session w/o extras (#623)

noxfile.py

@@ -31,6 +31,7 @@
 
 # 'docfx' is excluded since it only needs to run in 'docs-presubmit'
 nox.options.sessions = [
+    "unit_noextras",
     "unit",
     "system",
     "snippets",
@@ -42,7 +43,7 @@
 ]
 
 
-def default(session):
+def default(session, install_extras=True):
     """Default unit test session.
 
     This is intended to be run **without** an interpreter set, so
@@ -65,7 +66,8 @@ def default(session):
         constraints_path,
     )
 
-    session.install("-e", ".[all]", "-c", constraints_path)
+    install_target = ".[all]" if install_extras else "."
+    session.install("-e", install_target, "-c", constraints_path)
 
     session.install("ipython", "-c", constraints_path)
 
@@ -90,6 +92,12 @@ def unit(session):
     default(session)
 
 
+@nox.session(python=UNIT_TEST_PYTHON_VERSIONS[-1])
+def unit_noextras(session):
+    """Run the unit test suite."""
+    default(session, install_extras=False)
+
+
 @nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)
 def system(session):
     """Run the system test suite."""

tests/unit/test__pandas_helpers.py

@@ -1464,6 +1464,7 @@ def test_download_dataframe_row_iterator_dict_sequence_schema(module_under_test)
         result = next(results_gen)
 
 
+@pytest.mark.skipif(pandas is None, reason="Requires `pandas`")
 def test_table_data_listpage_to_dataframe_skips_stop_iteration(module_under_test):
     dataframe = module_under_test._row_iterator_page_to_dataframe([], [], {})
     assert isinstance(dataframe, pandas.DataFrame)

tests/unit/test_client.py

@@ -65,7 +65,12 @@
 from tests.unit.helpers import make_connection
 
 PANDAS_MINIUM_VERSION = pkg_resources.parse_version("1.0.0")
-PANDAS_INSTALLED_VERSION = pkg_resources.get_distribution("pandas").parsed_version
+
+if pandas is not None:
+    PANDAS_INSTALLED_VERSION = pkg_resources.get_distribution("pandas").parsed_version
+else:
+    # Set to less than MIN version.
+    PANDAS_INSTALLED_VERSION = pkg_resources.parse_version("0.0.0")
 
 
 def _make_credentials():