test(cdc): Add defaultvalue integration test (#4224)

close #4223

tests/integration_tests/default_value/config.toml

@@ -0,0 +1,20 @@
+# Source DB config
+log-level = "info"
+
+worker-count = 10
+job-count = 1000
+batch = 10
+
+pd = "127.0.0.1:2379"
+
+[[source-db]]
+host = "127.0.0.1"
+user = "root"
+password = ""
+port = 4000
+
+[[source-db]]
+host = "127.0.0.1"
+user = "root"
+password = ""
+port = 4001

tests/integration_tests/default_value/diff_config.toml

@@ -0,0 +1,29 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/tidb_cdc_test/default_value/sync_diff/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql1"
+
+    target-check-tables = ["test.?*"]
+
+[data-sources]
+[data-sources.tidb0]
+    host = "127.0.0.1"
+    port = 4000
+    user = "root"
+    password = ""
+
+[data-sources.mysql1]
+    host = "127.0.0.1"
+    port = 3306
+    user = "root"
+    password = ""