tests: added test case for table routing

tests/routes/config.toml

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+[lightning]
+check-requirements = false
+file = "/dev/stderr" #"/tmp/lightning_test_result/lightning.log"
+level = "info"
+
+# the complicated routing rules should be tested in tidb-tools repo already
+# here we're just verifying the basic things do work.
+[[routes]]
+schema-pattern = "routes_a*"
+table-pattern = "t*"
+target-schema = "routes_b"
+target-table = "u"
+
+[tikv-importer]
+addr = "127.0.0.1:8808"
+
+[mydumper]
+data-source-dir = "tests/routes/data"
+
+[tidb]
+host = "127.0.0.1"
+port = 4000
+user = "root"
+status-port = 10080
+pd-addr = "127.0.0.1:2379"
+log-level = "error"
+
+[post-restore]
+checksum = true
+compact = false
+analyze = false

tests/routes/data/routes_a0-schema-create.sql

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+create database routes_a0;

tests/routes/data/routes_a0.t0-schema.sql

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+create table t0 (x real primary key);

tests/routes/data/routes_a0.t0.1.sql

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+insert into t0 values (1.0);

tests/routes/data/routes_a0.t0.2.sql

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+insert into t0 values (6.0);

tests/routes/data/routes_a0.t1-schema.sql

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+create table t1 (x real primary key);

tests/routes/data/routes_a0.t1.1.sql

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+insert into t1 values (36.0);

tests/routes/data/routes_a1-schema-create.sql

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+create database routes_a1;

tests/routes/data/routes_a1.s1-schema.sql

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+create table s1 (x real primary key);

tests/routes/data/routes_a1.s1.sql

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+insert into s1 values (1296.0);

tests/routes/data/routes_a1.t2-schema.sql

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+create table t2 (x real primary key);

tests/routes/data/routes_a1.t2.sql

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+insert into t2 values (216.0);

tests/routes/run.sh

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+#!/bin/sh
+
+# Basic check for whether routing rules work
+
+set -eux
+
+run_sql 'DROP DATABASE IF EXISTS routes_a0;'
+run_sql 'DROP DATABASE IF EXISTS routes_a1;'
+run_sql 'DROP DATABASE IF EXISTS routes_b;'
+
+run_lightning
+
+run_sql 'SELECT count(1), sum(x) FROM routes_b.u;'
+check_contains 'count(1): 4'
+check_contains 'sum(x): 259'
+
+run_sql 'SELECT count(1), sum(x) FROM routes_a1.s1;'
+check_contains 'count(1): 1'
+check_contains 'sum(x): 1296'
+
+run_sql 'SHOW TABLES IN routes_a1;'
+check_not_contains 'Tables_in_routes_a1: t2'