docs: revise get table labels code sample, add TODO to clean up snipp… (

#1464)

* docs: revise get table labels code sample, add TODO to clean up snippets.py

* added a test with labels

* Update samples/snippets/get_table_labels_test.py

Co-authored-by: Tim Swast <swast@google.com>

docs/snippets.py

@@ -179,6 +179,8 @@ def test_manage_table_labels(client, to_delete):
     table.labels = labels
     table = client.create_table(table)
 
+    # TODO(Mattix23): After code sample is updated from cloud.google.com delete this
+
     # [START bigquery_get_table_labels]
     # from google.cloud import bigquery
     # client = bigquery.Client()

samples/snippets/get_table_labels.py

@@ -0,0 +1,39 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
+
+def get_table_labels(table_id: str) -> None:
+    orig_table_id = table_id
+    # [START bigquery_get_table_labels]
+    from google.cloud import bigquery
+
+    client = bigquery.Client()
+
+    # TODO(dev): Change table_id to the full name of the table you want to create.
+    table_id = "your-project.your_dataset.your_table_name"
+
+    # [END bigquery_get_table_labels]
+    table_id = orig_table_id
+
+    # [START bigquery_get_table_labels]
+    table = client.get_table(table_id)  # API Request
+
+    # View table labels
+    print(f"Table ID: {table_id}.")
+    if table.labels:
+        for label, value in table.labels.items():
+            print(f"\t{label}: {value}")
+    else:
+        print("\tTable has no labels defined.")
+    # [END bigquery_get_table_labels]

samples/snippets/get_table_labels_test.py

@@ -0,0 +1,50 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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 typing
+
+from google.cloud import bigquery
+
+import get_table_labels
+
+if typing.TYPE_CHECKING:
+    import pytest
+
+
+def test_get_table_labels(
+    capsys: "pytest.CaptureFixture[str]",
+    table_id: str,
+    bigquery_client: bigquery.Client,
+) -> None:
+    table = bigquery_client.get_table(table_id)
+    table.labels = {"color": "green"}
+    bigquery_client.update_table(table, ["labels"])
+
+    get_table_labels.get_table_labels(table_id)
+
+    out, _ = capsys.readouterr()
+    assert table_id in out
+    assert "color" in out
+
+
+def test_get_table_labels_no_label(
+    capsys: "pytest.CaptureFixture[str]",
+    table_id: str,
+) -> None:
+
+    get_table_labels.get_table_labels(table_id)
+
+    out, _ = capsys.readouterr()
+    assert "no labels defined" in out
+    assert table_id in out