Adds tests for connection loss exception handling, and unretryable SQL exceptions

spec/outputs/jdbc_derby_spec.rb

@@ -9,20 +9,17 @@ describe 'logstash-output-jdbc: derby', if: ENV['JDBC_DERBY_JAR'] do
     'JDBC_DERBY_JAR'
   end
 
-  let(:jdbc_drop_table) do
-    nil
-  end
-
   let(:jdbc_create_table) do
-    "CREATE table #{jdbc_test_table} (created_at timestamp, message varchar(512))"
+    "CREATE table #{jdbc_test_table} (created_at timestamp not null, message varchar(512) not null)"
   end
-
+ 
   let(:jdbc_settings) do
     {
       'driver_class' => 'org.apache.derby.jdbc.EmbeddedDriver',
       'connection_string' => 'jdbc:derby:memory:testdb;create=true',
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ['insert into logstash_output_jdbc_test (created_at, message) values(?, ?)', '@timestamp', 'message']
+      'statement' => ['insert into logstash_output_jdbc_test (created_at, message) values(?, ?)', '@timestamp', 'message'],
+      'max_flush_exceptions' => 1
     }
   end
 end

spec/outputs/jdbc_mysql_spec.rb

@@ -9,12 +9,17 @@ describe 'logstash-output-jdbc: mysql', if: ENV['JDBC_MYSQL_JAR'] do
     'JDBC_MYSQL_JAR'
   end
 
+  let(:systemd_database_service) do
+    'mysql'
+  end
+
   let(:jdbc_settings) do
     {
       'driver_class' => 'com.mysql.jdbc.Driver',
       'connection_string' => 'jdbc:mysql://localhost/logstash_output_jdbc_test?user=root',
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message']
+      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message'],
+      'max_flush_exceptions' => 1
     }
   end
 end

spec/outputs/jdbc_sqlite_spec.rb

@@ -20,7 +20,8 @@ describe 'logstash-output-jdbc: sqlite', if: ENV['JDBC_SQLITE_JAR'] do
       'driver_class' => 'org.sqlite.JDBC',
       'connection_string' => "jdbc:sqlite:#{JDBC_SQLITE_FILE}",
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message']
+      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message'],
+      'max_flush_exceptions' => 1
     }
   end
 end