From e57e7f945eea61bf5164ee4e656b1a3d4a66ef55 Mon Sep 17 00:00:00 2001
From: Valentin Deniaud <vdeniaud@entrouvert.com>
Date: Mon, 28 Nov 2022 16:44:01 +0100
Subject: [PATCH 2/3] testdef: add views to run tests (#71296)

---
 tests/admin_pages/test_tests.py               | 216 ++++++++++++++++++
 tests/test_testdef.py                         |  97 ++++++++
 wcs/admin/forms.py                            |   6 +
 wcs/admin/tests.py                            | 173 ++++++++++++++
 wcs/fields.py                                 |   3 +-
 .../wcs/backoffice/test_results.html          |  14 ++
 wcs/templates/wcs/backoffice/tests.html       |  38 +++
 wcs/testdef.py                                | 105 ++++++++-
 8 files changed, 650 insertions(+), 2 deletions(-)
 create mode 100644 tests/admin_pages/test_tests.py
 create mode 100644 tests/test_testdef.py
 create mode 100644 wcs/admin/tests.py
 create mode 100644 wcs/templates/wcs/backoffice/test_results.html
 create mode 100644 wcs/templates/wcs/backoffice/tests.html

diff --git a/tests/admin_pages/test_tests.py b/tests/admin_pages/test_tests.py
new file mode 100644
index 000000000..6e94fde87
--- /dev/null
+++ b/tests/admin_pages/test_tests.py
@@ -0,0 +1,216 @@
+import datetime
+import json
+import os
+
+import pytest
+from django.utils.html import escape
+from webtest import Upload
+
+from wcs import fields
+from wcs.formdef import FormDef
+from wcs.qommon.http_request import HTTPRequest
+from wcs.testdef import TestDef
+
+from ..utilities import clean_temporary_pub, create_temporary_pub, get_app, login
+from .test_all import create_superuser
+
+
+@pytest.fixture
+def pub():
+    pub = create_temporary_pub()
+
+    req = HTTPRequest(None, {'SCRIPT_NAME': '/', 'SERVER_NAME': 'example.net'})
+    pub.set_app_dir(req)
+    pub.cfg['identification'] = {'methods': ['password']}
+    pub.write_cfg()
+
+    if not pub.site_options.has_section('options'):
+        pub.site_options.add_section('options')
+    pub.site_options.set('options', 'enable-tests', 'true')
+    with open(os.path.join(pub.app_dir, 'site-options.cfg'), 'w') as fd:
+        pub.site_options.write(fd)
+
+    FormDef.wipe()
+    TestDef.wipe()
+    return pub
+
+
+def teardown_module(module):
+    clean_temporary_pub()
+
+
+def test_tests_link_on_formdef_page(pub):
+    formdef = FormDef()
+    formdef.name = 'test title'
+    formdef.store()
+
+    create_superuser(pub)
+    app = login(get_app(pub))
+
+    resp = app.get(formdef.get_admin_url())
+    assert 'Tests' in resp.text
+
+    pub.site_options.set('options', 'enable-tests', 'false')
+    with open(os.path.join(pub.app_dir, 'site-options.cfg'), 'w') as fd:
+        pub.site_options.write(fd)
+
+    resp = app.get(formdef.get_admin_url())
+    assert 'Tests' not in resp.text
+
+
+def test_tests_page(pub):
+    user = create_superuser(pub)
+
+    formdef = FormDef()
+    formdef.name = 'test title'
+    formdef.fields = [
+        fields.PageField(
+            id='0',
+            label='1st page',
+            type='page',
+            post_conditions=[
+                {'condition': {'type': 'django', 'value': 'form_var_text == "a"'}, 'error_message': 'Error'}
+            ],
+        ),
+        fields.StringField(id='1', label='Text', varname='text'),
+    ]
+    formdef.store()
+
+    app = login(get_app(pub))
+
+    resp = app.get(formdef.get_admin_url())
+    resp = resp.click('Tests')
+    assert 'There are no tests yet.' in resp.text
+    assert 'Run' not in resp.text
+    assert 'Tests cannot be created because there are no completed forms.' in resp.text
+    assert 'New' not in resp.text
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.receipt_time = datetime.datetime(2021, 1, 1, 0, 0).timetuple()
+    formdata.data['1'] = 'a'
+    formdata.user_id = user.id
+    formdata.store()
+
+    resp = app.get(formdef.get_admin_url())
+    resp = resp.click('Tests')
+    assert 'There are no tests yet.' in resp.text
+    assert 'Run' not in resp.text
+    assert 'New tests cannot be created' not in resp.text
+
+    resp = resp.click('New')
+    resp.form['name'] = 'First test'
+    resp.form['formdata_id'].select(text='1-1 - admin')
+    assert len(resp.form['formdata_id'].options) == 1
+
+    resp = resp.form.submit().follow()
+    assert 'First test' in resp.text
+    assert 'no tests yet' not in resp.text
+
+    resp = resp.click('Run')
+    assert 'First test: Success!' in resp.text
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.receipt_time = datetime.datetime(2021, 1, 1, 0, 0).timetuple()
+    formdata.data['1'] = 'b'
+    formdata.store()
+
+    resp = app.get('/backoffice/forms/1/tests/new')
+    resp.form['name'] = 'Second test'
+    resp.form['formdata_id'].select(text='1-2 - Unknown User')
+    assert len(resp.form['formdata_id'].options) == 2
+
+    resp = resp.form.submit().follow()
+    assert 'First test' in resp.text
+    assert 'Second test' in resp.text
+
+    resp = resp.click('Run')
+    assert 'First test: Success!' in resp.text
+    assert 'Second test: Page 1 post condition was not met (form_var_text == &quot;a&quot;).' in resp.text
+
+
+def test_tests_page_formdefs_isolation(pub):
+    formdef = FormDef()
+    formdef.name = 'dummy'
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.store()
+
+    other_formdef = FormDef()
+    other_formdef.name = 'dummy2'
+    other_formdef.store()
+
+    formdata2 = other_formdef.data_class()()
+    formdata2.just_created()
+    formdata2.store()
+
+    create_superuser(pub)
+    app = login(get_app(pub))
+
+    resp = app.get('/backoffice/forms/1/tests/new')
+    assert len(resp.form['formdata_id'].options) == 1
+    assert resp.form['formdata_id'].options[0][2] == '1-1 - Unknown User'
+
+    resp = app.get('/backoffice/forms/2/tests/new')
+    assert len(resp.form['formdata_id'].options) == 1
+    assert resp.form['formdata_id'].options[0][2] == '2-1 - Unknown User'
+
+
+def test_tests_import_export(pub):
+    user = create_superuser(pub)
+
+    formdef = FormDef()
+    formdef.name = 'test title'
+    formdef.fields = [fields.StringField(id='1', varname='test field', label='Test', type='string')]
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.receipt_time = datetime.datetime(2021, 1, 1, 0, 0).timetuple()
+    formdata.data['1'] = 'a'
+    formdata.user_id = user.id
+    formdata.store()
+
+    testdef = TestDef.create_from_formdata(formdef, formdata)
+    testdef.name = 'First test'
+    testdef.store()
+
+    app = login(get_app(pub))
+
+    resp = app.get('/backoffice/forms/1/tests/')
+    export_resp = resp.click('First test')
+
+    resp = resp.click('remove')
+    resp = resp.form.submit().follow()
+    assert 'First test' not in resp.text
+
+    resp = resp.click('Import')
+    resp.form['file'] = Upload('export.json', export_resp.body, 'application/json')
+    resp = resp.form.submit().follow()
+    assert TestDef.count() == 1
+    assert 'First test' in resp.text
+    assert escape('Test "First test" has been successfully imported.') in resp.text
+
+    imported_testdef = TestDef.select()[0]
+    assert imported_testdef.export_to_json() == testdef.export_to_json()
+
+    export_json = json.loads(export_resp.body)
+    export_json['data']['fields']['1'] = 'b'
+
+    resp = resp.click('Import')
+    resp.form['file'] = Upload('export.json', json.dumps(export_json).encode(), 'application/json')
+    resp = resp.form.submit().follow()
+    assert TestDef.count() == 1
+    assert 'First test' in resp.text
+    assert escape('Test "First test" has been successfully imported.') in resp.text
+
+    imported_testdef.refresh_from_storage()
+    assert imported_testdef.data['fields']['1'] == 'b'
+
+    resp = resp.click('Import')
+    resp.form['file'] = Upload('export.json', b'invalid', 'application/json')
+    resp = resp.form.submit()
+    assert 'Expecting value: line 1 column 1' in resp.text
diff --git a/tests/test_testdef.py b/tests/test_testdef.py
new file mode 100644
index 000000000..d1dbc3a3f
--- /dev/null
+++ b/tests/test_testdef.py
@@ -0,0 +1,97 @@
+import datetime
+
+import pytest
+
+from wcs import fields
+from wcs.formdef import FormDef
+from wcs.qommon.http_request import HTTPRequest
+from wcs.testdef import TestDef, TestError
+
+from .utilities import clean_temporary_pub, create_temporary_pub
+
+
+@pytest.fixture
+def pub():
+    pub = create_temporary_pub()
+
+    req = HTTPRequest(None, {'SCRIPT_NAME': '/', 'SERVER_NAME': 'example.net'})
+    pub.set_app_dir(req)
+    pub.write_cfg()
+
+    FormDef.wipe()
+    return pub
+
+
+def teardown_module(module):
+    clean_temporary_pub()
+
+
+def test_page_post_conditions(pub):
+    formdef = FormDef()
+    formdef.name = 'test title'
+    formdef.fields = [
+        fields.TitleField(id='0', label='Title', type='title'),
+        fields.PageField(
+            id='1',
+            label='1st page',
+            type='page',
+            post_conditions=[
+                {'condition': {'type': 'django', 'value': 'form_var_text == "a"'}, 'error_message': 'Error'}
+            ],
+        ),
+        fields.StringField(id='2', label='Text', varname='text'),
+        fields.PageField(
+            id='3',
+            label='2nd page',
+            type='page',
+            post_conditions=[
+                {'condition': {'type': 'django', 'value': 'form_var_text2 == "a"'}, 'error_message': 'Error'}
+            ],
+        ),
+        fields.StringField(id='4', label='Text', varname='text2'),
+    ]
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.receipt_time = datetime.datetime(2021, 1, 1, 0, 0).timetuple()
+    formdata.data['2'] = 'a'
+    formdata.data['4'] = 'a'
+
+    testdef = TestDef.create_from_formdata(formdef, formdata)
+    testdef.run(formdef)
+
+    formdata.data['4'] = 'b'
+    testdef = TestDef.create_from_formdata(formdef, formdata)
+    with pytest.raises(TestError) as excinfo:
+        testdef.run(formdef)
+    assert str(excinfo.value) == 'Page 2 post condition was not met (form_var_text2 == "a").'
+
+    formdata.data['2'] = 'b'
+    testdef = TestDef.create_from_formdata(formdef, formdata)
+    with pytest.raises(TestError) as excinfo:
+        testdef.run(formdef)
+    assert str(excinfo.value) == 'Page 1 post condition was not met (form_var_text == "a").'
+
+
+def test_page_post_condition_invalid(pub):
+    formdef = FormDef()
+    formdef.name = 'test title'
+    formdef.fields = [
+        fields.PageField(
+            id='0',
+            label='1st page',
+            type='page',
+            post_conditions=[{'condition': {'type': 'django', 'value': '{{}'}, 'error_message': 'Error'}],
+        ),
+    ]
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.receipt_time = datetime.datetime(2021, 1, 1, 0, 0).timetuple()
+
+    testdef = TestDef.create_from_formdata(formdef, formdata)
+    with pytest.raises(TestError) as excinfo:
+        testdef.run(formdef)
+    assert str(excinfo.value) == 'Failed to evaluate page 1 post condition.'
diff --git a/wcs/admin/forms.py b/wcs/admin/forms.py
index d61d0cc1a..62b2df2c1 100644
--- a/wcs/admin/forms.py
+++ b/wcs/admin/forms.py
@@ -59,6 +59,7 @@ from .categories import CategoriesDirectory, get_categories
 from .data_sources import NamedDataSourcesDirectory
 from .fields import FieldDefPage, FieldsDirectory
 from .logged_errors import LoggedErrorsDirectory
+from .tests import TestsDirectory
 
 
 def is_global_accessible(section):
@@ -614,6 +615,7 @@ class FormDefPage(Directory):
         'qrcode',
         'information',
         'inspect',
+        'tests',
         ('public-url', 'public_url'),
         ('backoffice-submission-roles', 'backoffice_submission_roles'),
         ('logged-errors', 'logged_errors_dir'),
@@ -627,6 +629,7 @@ class FormDefPage(Directory):
     section = 'forms'
     options_directory_class = OptionsDirectory
     fields_directory_class = AdminFieldsDirectory
+    tests_directory_class = TestsDirectory
 
     delete_message = _('You are about to irrevocably delete this form.')
     delete_title = _('Deleting Form:')
@@ -653,6 +656,7 @@ class FormDefPage(Directory):
         self.role = WorkflowRoleDirectory(self.formdef)
         self.role.html_top = self.html_top
         self.options = self.options_directory_class(self.formdef, self.formdefui)
+        self.tests = self.tests_directory_class(self.formdef)
         self.logged_errors_dir = LoggedErrorsDirectory(
             parent_dir=self, formdef_class=self.formdef_class, formdef_id=self.formdef.id
         )
@@ -938,6 +942,8 @@ class FormDefPage(Directory):
             r += htmltext('<li><a rel="popup" href="history/save">%s</a></li>') % _('Save snapshot')
             r += htmltext('<li><a href="history/">%s</a></li>') % _('History')
         r += htmltext('<li><a href="inspect">%s</a></li>') % _('Inspector')
+        if get_publisher().has_site_option('enable-tests'):
+            r += htmltext('<li><a href="tests/">%s</a></li>') % _('Tests')
         r += htmltext('</ul>')
 
         r += htmltext('<ul>')
diff --git a/wcs/admin/tests.py b/wcs/admin/tests.py
new file mode 100644
index 000000000..be5f7c9c4
--- /dev/null
+++ b/wcs/admin/tests.py
@@ -0,0 +1,173 @@
+# w.c.s. - web application for online forms
+# Copyright (C) 2005-2022  Entr'ouvert
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+
+import json
+
+from quixote import get_response, get_session, redirect
+from quixote.directory import Directory
+from quixote.html import TemplateIO, htmltext
+
+from wcs.qommon import _, template
+from wcs.qommon.backoffice.menu import html_top
+from wcs.qommon.errors import TraversalError
+from wcs.qommon.form import FileWidget, Form, SingleSelectWidget, StringWidget
+from wcs.qommon.storage import Equal, StrictNotEqual
+from wcs.testdef import TestDef, TestError
+
+
+class TestPage(Directory):
+    _q_exports = ['delete', 'export']
+
+    def __init__(self, component):
+        try:
+            self.testdef = TestDef.get(component)
+        except KeyError:
+            raise TraversalError()
+
+    def delete(self):
+        form = Form(enctype='multipart/form-data')
+        form.add_submit('delete', _('Submit'))
+        form.add_submit('cancel', _('Cancel'))
+
+        if form.get_widget('cancel').parse():
+            return redirect('.')
+        if not form.is_submitted() or form.has_errors():
+            get_response().breadcrumb.append(('delete', _('Delete')))
+            r = TemplateIO(html=True)
+            r += htmltext('<h2>%s %s</h2>') % (_('Deleting Test:'), self.testdef)
+            r += form.render()
+            return r.getvalue()
+        else:
+            self.testdef.remove_self()
+            return redirect('..')
+
+    def export(self):
+        get_response().set_content_type('application/json')
+        get_response().set_header(
+            'content-disposition', 'attachment; filename=wcs_test_%s.json' % self.testdef.name
+        )
+        return json.dumps(self.testdef.export_to_json())
+
+
+class TestsDirectory(Directory):
+    _q_exports = ['', 'new', 'run', ('import', 'p_import')]
+    section = 'tests'
+
+    def __init__(self, objectdef):
+        self.objectdef = objectdef
+
+    def _q_traverse(self, path):
+        get_response().breadcrumb.append(('tests', _('Tests')))
+        html_top('tests', '%s - %s' % (self.objectdef.name, _('Tests')))
+        return super()._q_traverse(path)
+
+    def _q_lookup(self, component):
+        return TestPage(component)
+
+    def _q_index(self):
+        context = {
+            'testdefs': TestDef.select(
+                [Equal('object_type', self.objectdef.get_table_name()), Equal('object_id', self.objectdef.id)]
+            ),
+            'formdata': self.objectdef.data_class().select([StrictNotEqual('status', 'draft')]),
+        }
+        return template.QommonTemplateResponse(templates=['wcs/backoffice/tests.html'], context=context)
+
+    def new(self):
+        form = Form(enctype='multipart/form-data')
+        form.add(StringWidget, 'name', title=_('Name'), required=True, size=50)
+        formadata_options = sorted(
+            [
+                (x.id, '%s - %s' % (x.id_display, x.user or _('Unknown User')))
+                for x in self.objectdef.data_class().select([StrictNotEqual('status', 'draft')])
+            ],
+            key=lambda x: x[1],
+        )
+        form.add(SingleSelectWidget, 'formdata_id', title=_('Form'), required=True, options=formadata_options)
+        form.add_submit('submit', _('Submit'))
+        form.add_submit('cancel', _('Cancel'))
+
+        if form.get_widget('cancel').parse():
+            return redirect('.')
+
+        if not form.is_submitted() or form.has_errors():
+            get_response().breadcrumb.append(('new', _('New')))
+            r = TemplateIO(html=True)
+            r += htmltext('<h2>%s</h2>') % _('New test')
+            r += form.render()
+            return r.getvalue()
+        else:
+            formdata_id = form.get_widget('formdata_id').parse()
+            formdata = self.objectdef.data_class().get(formdata_id)
+
+            testdef = TestDef.create_from_formdata(self.objectdef, formdata)
+            testdef.name = form.get_widget('name').parse()
+            testdef.store()
+
+        return redirect('.')
+
+    def run(self):
+        get_response().breadcrumb.append(('run', _('Run tests')))
+
+        testdef = TestDef.select(
+            [Equal('object_type', self.objectdef.get_table_name()), Equal('object_id', self.objectdef.id)]
+        )
+        for test in testdef:
+            try:
+                test.run(self.objectdef)
+            except TestError as e:
+                test.error = e
+
+        return template.QommonTemplateResponse(
+            templates=['wcs/backoffice/test_results.html'], context={'tests': testdef}
+        )
+
+    def p_import(self):
+        form = Form(enctype='multipart/form-data')
+
+        form.add(FileWidget, 'file', title=_('File'), required=True)
+        form.add_submit('submit', _('Import Test'))
+        form.add_submit('cancel', _('Cancel'))
+
+        if form.get_submit() == 'cancel':
+            return redirect('.')
+
+        if form.is_submitted() and not form.has_errors():
+            try:
+                return self.import_submit(form)
+            except ValueError:
+                pass
+
+        get_response().breadcrumb.append(('import', _('Import')))
+        r = TemplateIO(html=True)
+        r += htmltext('<h2>%s</h2>') % _('Import Test')
+        r += htmltext('<p>%s</p>') % _(
+            'You can add a new test or update an existing one by importing a JSON file.'
+        )
+        r += form.render()
+        return r.getvalue()
+
+    def import_submit(self, form):
+        fp = form.get_widget('file').parse().fp
+
+        try:
+            testdef = TestDef.import_from_json(json.loads(fp.read()))
+        except Exception as e:
+            form.set_error('file', str(e))
+            raise ValueError()
+
+        get_session().message = ('info', _('Test "%s" has been successfully imported.') % testdef.name)
+        return redirect('.')
diff --git a/wcs/fields.py b/wcs/fields.py
index 7ed8321e8..83a987bac 100644
--- a/wcs/fields.py
+++ b/wcs/fields.py
@@ -614,7 +614,8 @@ class Field:
             self.in_listing = None
         return changed
 
-    def evaluate_condition(self, dict_vars, formdef, condition):
+    @staticmethod
+    def evaluate_condition(dict_vars, formdef, condition):
         return PageCondition(condition, {'dict_vars': dict_vars, 'formdef': formdef}).evaluate()
 
     def is_visible(self, dict, formdef):
diff --git a/wcs/templates/wcs/backoffice/test_results.html b/wcs/templates/wcs/backoffice/test_results.html
new file mode 100644
index 000000000..15b050418
--- /dev/null
+++ b/wcs/templates/wcs/backoffice/test_results.html
@@ -0,0 +1,14 @@
+{% extends "wcs/backoffice/base.html" %}
+{% load i18n %}
+
+{% block appbar-title %}{% trans "Tests results" %}{% endblock %}
+
+{% block content %}
+  <div class="section">
+    <ul>
+      {% for test in tests %}
+        <li>{{ test }}{% trans ":" %} {% firstof test.error _("Success!") %}</li>
+      {% endfor %}
+    </ul>
+  </div>
+{% endblock %}
diff --git a/wcs/templates/wcs/backoffice/tests.html b/wcs/templates/wcs/backoffice/tests.html
new file mode 100644
index 000000000..e053685fa
--- /dev/null
+++ b/wcs/templates/wcs/backoffice/tests.html
@@ -0,0 +1,38 @@
+{% extends "wcs/backoffice/base.html" %}
+{% load i18n %}
+
+{% block appbar-title %}{% trans "Tests" %}{% endblock %}
+{% block appbar-actions %}
+  <a href="import" rel="popup">{% trans "Import" %}</a>
+  {% if testdefs %}
+    <a href="run">{% trans "Run tests" %}</a>
+  {% endif %}
+  {% if formdata %}
+    <a href="new" rel="popup">{% trans "New" %}</a>
+  {% endif %}
+{% endblock %}
+
+{% block content %}
+  <div class="section">
+    <h3>{% trans "Test form data" %}</h3>
+
+    {% if not formdata %}
+      <div class="infonotice">
+        <p>{% trans "Tests cannot be created because there are no completed forms." %}</p>
+      </div>
+    {% endif %}
+
+    {% if testdefs %}
+      <ul class="objects-list single-links">
+        {% for test in testdefs %}
+          <li>
+            <a download href="{{ test.id }}/export">{{ test }}</a>
+            <a rel="popup" class="delete" href="{{ test.id }}/delete">{% trans "remove" %}</a>
+          </li>
+        {% endfor %}
+      </ul>
+    {% else %}
+      <div><p>{% trans "There are no tests yet." %}<p></div>
+    {% endif %}
+  </div>
+{% endblock %}
diff --git a/wcs/testdef.py b/wcs/testdef.py
index 7c3db9267..10432df96 100644
--- a/wcs/testdef.py
+++ b/wcs/testdef.py
@@ -14,7 +14,14 @@
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
-from .qommon.storage import StorableObject
+from quixote import get_publisher
+
+from .qommon import _, misc
+from .qommon.storage import Equal, StorableObject
+
+
+class TestError(Exception):
+    pass
 
 
 class TestDef(StorableObject):
@@ -26,3 +33,99 @@ class TestDef(StorableObject):
     object_id = None
 
     data = None  # (json export of formdata, carddata, etc.)
+
+    def __str__(self):
+        return self.name
+
+    def store(self, *args, comment=None, snapshot_store_user=True, **kwargs):
+        if not self.slug:
+            existing_slugs = {x.slug for x in self.select(ignore_migration=True, ignore_errors=True)}
+            base_slug = misc.simplify(self.name)
+            self.slug = base_slug
+            i = 2
+            while self.slug in existing_slugs:
+                self.slug = '%s-%s' % (base_slug, i)
+                i += 1
+        super().store(*args, **kwargs)
+
+    @classmethod
+    def create_from_formdata(cls, formdef, formdata):
+        testdef = cls()
+        testdef.object_type = formdef.get_table_name()
+        testdef.object_id = formdef.id
+        testdef.data = {
+            'fields': formdata.data,
+            'user': formdata.user.get_json_export_dict() if formdata.user else None,
+        }
+        return testdef
+
+    def run(self, objectdef):
+        formdata = objectdef.data_class()()
+        if self.data['user']:
+            formdata.set_user_from_json(self.data['user'])
+
+        get_publisher().substitutions.reset()
+        get_publisher().substitutions.feed(get_publisher())
+        get_publisher().substitutions.feed(objectdef)
+        get_publisher().substitutions.feed(formdata)
+
+        page_no = 0
+        page_post_conditions = []
+        for field in objectdef.fields:
+            if field.type == 'page':
+                if page_post_conditions:
+                    self.evaluate_page_conditions(page_no, formdata, objectdef, page_post_conditions)
+
+                page_post_conditions = field.post_conditions or []
+                page_no += 1
+                continue
+
+            if field.type in ('subtitle', 'title', 'comment', 'computed'):
+                continue
+
+            formdata.data[field.id] = self.data['fields'].get(field.id)
+            get_publisher().substitutions.invalidate_cache()
+
+        # evaluate last page post condition
+        self.evaluate_page_conditions(page_no, formdata, objectdef, page_post_conditions)
+
+    def evaluate_page_conditions(self, page_no, form_data, objectdef, conditions):
+        from wcs.fields import Field
+
+        for post_condition in conditions:
+            condition = post_condition.get('condition', {})
+            try:
+                if not Field.evaluate_condition(form_data.data, objectdef, condition):
+                    raise TestError(
+                        _('Page %(no)s post condition was not met (%(condition)s).')
+                        % {'no': page_no, 'condition': condition.get('value')}
+                    )
+            except RuntimeError:
+                raise TestError(_('Failed to evaluate page %s post condition.') % page_no)
+
+    def export_to_json(self):
+        return {
+            'name': self.name,
+            'slug': self.slug,
+            'object_type': self.object_type,
+            'object_id': self.object_id,
+            'data': self.data,
+        }
+
+    @classmethod
+    def import_from_json(cls, data):
+        testdefs = TestDef.select(
+            [
+                Equal('object_type', data['object_type']),
+                Equal('object_id', data['object_id']),
+                Equal('slug', data['slug']),
+            ]
+        )
+
+        testdef = testdefs[0] if testdefs else TestDef()
+
+        for k, v in data.items():
+            setattr(testdef, k, v)
+
+        testdef.store()
+        return testdef
-- 
2.35.1