fix: replace direct instantiation with context manager in InfluxDBClient3 tests

Author: NguyenHoangSon96

tests/test_influxdb_client_3.py

@@ -357,28 +357,27 @@ def test_url_with_path_prefix(self):
         server.expect_request('/prefix/prefix1/ping').respond_with_json(
             response_json={"version": "3.0"},
         )
-        version = InfluxDBClient3(
+        with InfluxDBClient3(
             host=f'http://{server.host}:{server.port}/prefix/prefix1',
             org="ORG",
             database="DB",
             token="TOKEN"
-        ).get_server_version()
-        assert version == "3.0"
+        ) as client:
+            assert client.get_server_version() == "3.0"
 
     def test_url_error_without_path_prefix(self):
         server = self.http_server
         server.expect_request('/prefix/ping').respond_with_json(
             response_json={"version": "3.0"},
         )
-        try:
-            InfluxDBClient3(
+        with InfluxDBClient3(
                 host=f'http://{server.host}:{server.port}',
                 org="ORG",
                 database="DB",
                 token="TOKEN"
-            ).get_server_version()
-        except ApiException:
-            self.assertRaises(ApiException)
+        ) as client:
+            with self.assertRaises(ApiException):
+                client.get_server_version()
 
 
 if __name__ == '__main__':

tests/test_write_local_server.py

@@ -45,12 +45,13 @@ def test_write_with_path_prefix(self):
         httpserver.start()
         httpserver.expect_request("/prefix/prefix1/api/v2/write").respond_with_data(status=200)
 
-        InfluxDBClient3(
-            host=(httpserver.url_for("/prefix/prefix1")), org="ORG", database="DB", token="TOKEN",
-            write_client_options=write_client_options(
-                write_options=WriteOptions(write_type=WriteType.synchronous)
-            )
-        ).write(self.SAMPLE_RECORD)
+        with InfluxDBClient3(
+                host=(httpserver.url_for("/prefix/prefix1")), org="ORG", database="DB", token="TOKEN",
+                write_client_options=write_client_options(
+                    write_options=WriteOptions(write_type=WriteType.synchronous)
+                )
+        ) as client:
+            client.write(self.SAMPLE_RECORD)
 
         self.assert_request_made(httpserver, RequestMatcher(
             method="POST", uri="/prefix/prefix1/api/v2/write",