skip test if no ipython

Author: TrevorBergeron

tests/system/small/test_magics.py

@@ -11,15 +11,20 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import pytest
 
-from IPython.testing.globalipapp import get_ipython
-from IPython.utils.capture import capture_output
 import pandas as pd
 import pytest
 
 import bigframes
 import bigframes.pandas as bpd
 
+IPython = pytest.importorskip("IPython")
+
+if IPython:
+    from IPython.testing.globalipapp import get_ipython
+    from IPython.utils.capture import capture_output
+
 MAGIC_NAME = "bqsql"