Add exit_code and status to Testruns, create model for TestrunMessages

* This is the first step to migrate the `output` column from Testruns to a dedicated table TestrunMessages

app/models/runner.rb

@@ -116,7 +116,7 @@ class Runner < ApplicationRecord
       output.merge!(status: :failed, container_execution_time: e.execution_duration)
     rescue Runner::Error => e
       Rails.logger.debug { "Running command `#{command}` failed: #{e.message}" }
-      output.merge!(status: :failed, container_execution_time: e.execution_duration)
+      output.merge!(status: :container_depleted, container_execution_time: e.execution_duration)
     ensure
       # We forward the exception if requested
       raise e if raise_exception && defined?(e) && e.present?

app/models/submission.rb

@@ -252,7 +252,9 @@ class Submission < ApplicationRecord
       cause: 'assess', # Required to differ run and assess for RfC show
       file: file, # Test file that was executed
       passed: passed,
-      output: testrun_output,
+      exit_code: output[:exit_code],
+      status: output[:status],
+      output: testrun_output.presence,
       container_execution_time: output[:container_execution_time],
       waiting_for_container_time: output[:waiting_for_container_time]
     )

app/models/testrun.rb

@@ -4,4 +4,16 @@ class Testrun < ApplicationRecord
   belongs_to :file, class_name: 'CodeOcean::File', optional: true
   belongs_to :submission
   belongs_to :testrun_execution_environment, optional: true, dependent: :destroy
+  has_many :testrun_messages, dependent: :destroy
+
+  enum status: {
+    ok: 0,
+    failed: 1,
+    container_depleted: 2,
+    timeout: 3,
+    out_of_memory: 4,
+  }, _default: :ok, _prefix: true
+
+  validates :exit_code, numericality: {only_integer: true, min: 0, max: 255}, allow_nil: true
+  validates :status, presence: true
 end

app/models/testrun_message.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+class TestrunMessage < ApplicationRecord
+  belongs_to :testrun
+
+  enum cmd: {
+    input: 0,
+    write: 1,
+    clear: 2,
+    turtle: 3,
+    turtlebatch: 4,
+    render: 5,
+    exit: 6,
+    timeout: 7,
+    out_of_memory: 8,
+    status: 9,
+    hint: 10,
+    client_kill: 11,
+    exception: 12,
+    result: 13,
+  }, _default: :write, _prefix: true
+
+  enum stream: {
+    stdin: 0,
+    stdout: 1,
+    stderr: 2,
+  }, _prefix: true
+
+  validates :cmd, presence: true
+  validates :timestamp, presence: true
+
+  validate :either_data_or_log
+
+  def either_data_or_log
+    if [data, log].count(&:present?) > 1
+      errors.add(log, "can't be present if data is also present")
+    end
+  end
+  private :either_data_or_log
+end