old_contents: from flask import Blueprint, g
  from flask import abort
  
  from decorators import template_renderer
  from mod_auth.controllers import login_required, check_access_rights
  from mod_auth.models import Role
  from mod_regression.models import Category, RegressionTest
  from mod_sample.models import Sample
  
  mod_regression = Blueprint('regression', __name__)
  
  
  @mod_regression.before_app_request
  def before_app_request():
      g.menu_entries['regression'] = {
          'title': 'Regression tests',
          'icon': 'industry',
          'route': 'regression.index'
      }
  
  
  @mod_regression.route('/')
  @template_renderer()
  def index():
      return {
          'tests': RegressionTest.query.all(),
          'categories': Category.query.order_by(Category.name.asc()).all()
      }
  
  
  @mod_regression.route('/sample/<sample_id>')
  @template_renderer()
  def by_sample(sample_id):
      # Show all regression tests for sample
      sample = Sample.query.filter(Sample.id == sample_id).first()
      if sample is None:
          abort(404)
      return {
          'sample': sample,
          'tests': RegressionTest.query.filter(
              RegressionTest.sample_id == sample.id).all()
      }
  
  
  @mod_regression.route('/test/<regression_id>/view')
  def test_view(regression_id):
      # Show a single regression test
      pass
  
  
  @mod_regression.route('/test/<regression_id>/delete')
  def test_delete(regression_id):
      # Delete the regression test
      pass
  
  
  @mod_regression.route('/test/<regression_id>/edit')
  def test_edit(regression_id):
      # Edit the regression test
      pass
  
  
  @mod_regression.route('/test/<regression_id>/results')
  def test_result(regression_id):
      # View the output files of the regression test
      pass
  
  
  @mod_regression.route('/test/new')
  def test_add():
      # Add a new regression test
      pass
  
  
  @mod_regression.route('/category/<category_id>/delete')
  def category_delete(category_id):
      # Delete a regression test category
      pass
  
  
  @mod_regression.route('/category/<category_id>/edit')
  def category_edit(category_id):
      # Edit a regression test category
      pass
  
  
  @mod_regression.route('/category/add')
  def category_add():
      # Add a regression test category
      pass
  
new_contents: from flask import Blueprint, g
  from flask import abort
  
  from decorators import template_renderer
  from mod_auth.controllers import login_required, check_access_rights
  from mod_auth.models import Role
  from mod_regression.models import Category, RegressionTest
  from mod_sample.models import Sample
  
  mod_regression = Blueprint('regression', __name__)
  
  
  @mod_regression.before_app_request
  def before_app_request():
      g.menu_entries['regression'] = {
          'title': 'Regression tests',
          'icon': 'industry',
          'route': 'regression.index'
      }
  
  
  @mod_regression.route('/')
  @template_renderer()
  def index():
      return {
          'tests': RegressionTest.query.all(),
          'categories': Category.query.order_by(Category.name.asc()).all()
      }
  
  
  @mod_regression.route('/sample/<sample_id>')
  @template_renderer()
  def by_sample(sample_id):
      # Show all regression tests for sample
      sample = Sample.query.filter(Sample.id == sample_id).first()
      if sample is None:
          abort(404)
      return {
          'sample': sample,
          'tests': RegressionTest.query.filter(
              RegressionTest.sample_id == sample.id).all()
      }
  
  
  @mod_regression.route('/test/<regression_id>/view')
  @template_renderer()
  def test_view(regression_id):
      # Show a single regression test
      test = RegressionTest.query.filter(RegressionTest.id == regression_id).first()
      
      if test is None:
          abort(404)
      
      return {
          'test': test   
      }
  
  
  @mod_regression.route('/test/<regression_id>/delete')
  def test_delete(regression_id):
      # Delete the regression test
      pass
  
  
  @mod_regression.route('/test/<regression_id>/edit')
  def test_edit(regression_id):
      # Edit the regression test
      pass
  
  
  @mod_regression.route('/test/<regression_id>/results')
  def test_result(regression_id):
      # View the output files of the regression test
      pass
  
  
  @mod_regression.route('/test/new')
  def test_add():
      # Add a new regression test
      pass
  
  
  @mod_regression.route('/category/<category_id>/delete')
  def category_delete(category_id):
      # Delete a regression test category
      pass
  
  
  @mod_regression.route('/category/<category_id>/edit')
  def category_edit(category_id):
      # Edit a regression test category
      pass
  
  
  @mod_regression.route('/category/add')
  def category_add():
      # Add a regression test category
      pass
  
subject: Add logic for viewing a regression test