[hotfix][test] Make pipeline migration tests more robust

This closes #3866

tools/mig-test/conf/pipeline.yaml

@@ -1,33 +0,0 @@
-# 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.
-
-source:
-  type: mysql
-  name: MySQL Source
-  hostname: localhost
-  port: 3306
-  username: root
-  password: ""
-  tables: fallen.\.*
-  server-id: 5400-5500
-  server-time-zone: UTC
-
-sink:
-  type: values
-  name: Values Sink
-
-pipeline:
-  name: ${PIPELINE_NAME}
-  parallelism: 1

tools/mig-test/run_migration_test.rb

@@ -40,6 +40,12 @@ def ensure_mystery_data(mystery)
   throw StandardError, 'Failed to get specific mystery string' unless `cat #{FLINK_HOME}/log/*.out`.include? mystery
 end
 
+def extract_job_id(output)
+  current_job_id = output.split("\n").filter { _1.start_with?('Job ID: ') }.first&.split&.last
+  raise StandardError, "Failed to submit Flink job. Output: #{output}" unless current_job_id&.length == 32
+  current_job_id
+end
+
 puts '   Waiting for source to start up...'
 next until exec_sql_source("SELECT '1';") == "1\n1\n"
 
@@ -53,8 +59,7 @@ def test_migration_chore(from_version, to_version)
   `rm -rf savepoints`
 
   # Prepare for current YAML file
-  test_route = !%w[3.0.0 3.0.1].include?(from_version)
-  yaml_job_template_file = test_route ? 'conf/pipeline-route.yaml' : 'conf/pipeline.yaml'
+  yaml_job_template_file = 'conf/pipeline-route.yaml'
   yaml_job_file = 'conf/temp.yaml'
   yaml_content = File.open(yaml_job_template_file).read.gsub('${PIPELINE_NAME}',
                                                              "Pipeline Migration Job (#{from_version} -> #{to_version})")
@@ -63,8 +68,7 @@ def test_migration_chore(from_version, to_version)
   # Submit current pipeline job file
   submit_job_output = `bash ./cdc-versions/#{from_version}/bin/flink-cdc.sh --flink-home #{FLINK_HOME} #{yaml_job_file}`
   puts "   #{submit_job_output}"
-  current_job_id = submit_job_output.split("\n")[1].split.last
-  raise StandardError, 'Failed to submit Flink job' unless current_job_id.length == 32
+  current_job_id = extract_job_id(submit_job_output)
 
   puts "   Current Job ID: #{current_job_id}"
 
@@ -81,9 +85,8 @@ def test_migration_chore(from_version, to_version)
   # Migrate to a newer CDC version
   puts "   Submitting CDC jobs at #{to_version}..."
   submit_job_output = `bash ./cdc-versions/#{to_version}/bin/flink-cdc.sh --from-savepoint #{Dir.pwd}/savepoints/#{savepoint_file} --allow-nonRestored-state --flink-home #{FLINK_HOME} #{yaml_job_file}`
-  puts "   #{submit_job_output}"
-  new_job_id = submit_job_output.split("\n")[1].split.last
-  raise StandardError, 'Failed to submit Flink job' unless new_job_id.length == 32
+  puts "#{submit_job_output}"
+  new_job_id = extract_job_id(submit_job_output)
 
   puts "   Upgraded Job ID: #{new_job_id}"
 
@@ -135,7 +138,7 @@ version_list.each_with_index do |old_version, old_index|
 
   result = test_migration old_version, new_version
   version_result[old_version + new_version] = result ? '✅' : '❌'
-  @failures << [old_version, new_version] unless result
+  @failures << "#{old_version} => #{new_version}" unless result
 end
 
 if @failures.any?