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Subject [GitHub] [flink] sunjincheng121 commented on a change in pull request #8347: [FLINK-12326][python] Add basic test framework for python api
Date Tue, 07 May 2019 02:12:53 GMT
sunjincheng121 commented on a change in pull request #8347: [FLINK-12326][python] Add basic
test framework for python api
URL: https://github.com/apache/flink/pull/8347#discussion_r281437149
 
 

 ##########
 File path: flink-python/pyflink/table/tests/test_table.py
 ##########
 @@ -0,0 +1,75 @@
+# ###############################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you 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
+#
+#      http://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 os
+import tempfile
+
+from pyflink.table.table_source import CsvTableSource
+from pyflink.table.types import DataTypes
+from pyflink.testing import source_sink_utils
+from pyflink.testing.test_case_utils import PyFlinkStreamTableTestCase
+
+
+class TableTests(PyFlinkStreamTableTestCase):
+
+    def test_select(self):
+        tmp_dir = tempfile.gettempdir()
+        source_path = tmp_dir + '/streaming.csv'
+        if os.path.isfile(source_path):
+            os.remove(source_path)
+        with open(source_path, 'w') as f:
+            lines = '1,hi,hello\n' + '2,hi,hello\n'
+            f.write(lines)
+            f.close()
+
+        field_names = ["a", "b", "c"]
+        field_types = [DataTypes.INT, DataTypes.STRING, DataTypes.STRING]
+
+        t_env = self.t_env
+
+        # register Orders table in table environment
+        t_env.register_table_source(
+            "Orders",
+            CsvTableSource(source_path, field_names, field_types))
+
+        t_env.register_table_sink(
+            "Results",
+            field_names, field_types, source_sink_utils.TestAppendSink())
+
+        t_env.scan("Orders") \
+             .where("a > 0") \
+             .select("a + 1, b, c") \
+             .insert_into("Results")
+
+        t_env.execute()
+
+        actual = source_sink_utils.results()
+        expected = ['2,hi,hello', '3,hi,hello']
+        self.assert_equals(actual, expected)
+
+
+if __name__ == '__main__':
+    import unittest
 
 Review comment:
   remove this line

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