tests: add test case for simple partitioned tables (pingcap#206)

tests/partitioned-table/config.toml

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+[lightning]
+check-requirements = false
+file = "/tmp/lightning_test_result/lightning.log"
+level = "warning"
+
+[tikv-importer]
+addr = "127.0.0.1:8808"
+
+[mydumper]
+data-source-dir = "tests/partitioned-table/data"
+
+[tidb]
+host = "127.0.0.1"
+user = "root"
+status-port = 10080
+log-level = "error"
+
+[post-restore]
+checksum = true
+analyze = true

tests/partitioned-table/data/partitioned-schema-create.sql

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+create database partitioned;

tests/partitioned-table/data/partitioned.a-schema.sql

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+create table a (a int) partition by hash(a) partitions 5;

tests/partitioned-table/data/partitioned.a.sql

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+insert into a values (268435456), (1), (262144), (32), (4), (65536), (8388608);
+

tests/partitioned-table/run.sh

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+#!/bin/sh
+#
+# Copyright 2019 PingCAP, Inc.
+#
+# 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
+#
+#     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,
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Basic check for whether partitioned tables work.
+
+set -eu
+
+run_sql 'DROP DATABASE IF EXISTS partitioned;'
+
+run_lightning
+
+run_sql 'SELECT count(1), sum(a) FROM partitioned.a;'
+check_contains 'count(1): 7'
+check_contains 'sum(a): 277151781'
+
+run_sql "SHOW TABLE STATUS FROM partitioned WHERE name = 'a';"
+check_contains 'Create_options: partitioned'