avis_imposition: mimic avis-imposition API particulier endpoint (#43479)

Return value is the same as API particulier for the avis-imposition endpoint, except for some data massaging put into alternative keys: * dates are converted to ISO format and put in keys with @_iso@ suffix, * family situation is simplified to ASCII and put in key with @_simple@ suffix, * addresse is returned as oneline joined with newlines as in API particulier, but also with individual lines separated into 3 keys : adresse1, adresse2, adresse3. * fake datas for testing can be configured trough AVIS_IMPOSITION_FAKE_DATA.
2020-05-28 17:04:48 +02:00 · 2020-05-28 17:04:48 +02:00 · 1de7845982
parent 0ed60d380d
commit 1de7845982
9 changed files with 972 additions and 0 deletions
--- a/passerelle/apps/avis_imposition/init.py
+++ b/passerelle/apps/avis_imposition/init.py
--- a/passerelle/apps/avis_imposition/migrations/0001_initial.py
+++ b/passerelle/apps/avis_imposition/migrations/0001_initial.py
@ -0,0 +1,38 @@
+# Generated by Django 1.11.20 on 2020-05-28 19:49
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+        ('base', '0020_auto_20200515_1923'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='AvisImposition',
+            fields=[
+                (
+                    'id',
+                    models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
+                ),
+                ('title', models.CharField(max_length=50, verbose_name='Title')),
+                ('slug', models.SlugField(unique=True, verbose_name='Identifier')),
+                ('description', models.TextField(verbose_name='Description')),
+                (
+                    'users',
+                    models.ManyToManyField(
+                        blank=True,
+                        related_name='_avisimposition_users_+',
+                        related_query_name='+',
+                        to='base.ApiUser',
+                    ),
+                ),
+            ],
+            options={
+                'verbose_name': 'API Particulier',
+            },
+        ),
+    ]
--- a/passerelle/apps/avis_imposition/migrations/init.py
+++ b/passerelle/apps/avis_imposition/migrations/init.py
--- a/passerelle/apps/avis_imposition/models.py
+++ b/passerelle/apps/avis_imposition/models.py
@ -0,0 +1,478 @@
+# passerelle - uniform access to multiple data sources and services
+# Copyright (C) 2017  Entr'ouvert
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+'''Interface with "Service de vérification des avis" of impots.gouv.fr
+
+   See also:
+
+   https://cfsmsp.impots.gouv.fr/secavis/
+   https://www.economie.gouv.fr/particuliers/authenticite-avis-impot-svair
+
+   Original code:
+   https://github.com/betagouv/svair-api
+   https://github.com/bdauvergne/svair-api (fork if upstream disapear)
+'''
+
+import datetime
+import logging
+import re
+import urllib.parse
+
+import lxml.html
+import requests
+from django.conf import settings
+from django.core.cache import cache
+from django.utils.translation import gettext_lazy as _
+
+from passerelle.base.models import BaseResource
+from passerelle.utils.api import endpoint
+from passerelle.utils.json import unflatten
+from passerelle.utils.jsonresponse import APIError
+from passerelle.utils.xml import text_content
+
+AVIS_IMPOSITION_GOUV_FR_URL = 'https://cfsmsp.impots.gouv.fr/secavis/'
+
+
+def remove_spaces(value):
+    return re.sub(r'\s', '', value, flags=re.U)
+
+
+def simplify_spaces(value):
+    return re.sub(r'\s+', ' ', value, flags=re.U)
+
+
+class NotFound(APIError):
+    def __init__(self):
+        super().__init__(_('These fiscal number and tax notice number are unknown.'))
+
+
+VERIFY_SCHEMA_RESPONSE_NUMBERS = [
+    "dateEtablissement_year",
+    "dateRecouvrement_year",
+    "foyerFiscal__year",
+    "impotRevenuNetAvantCorrections",
+    "nombreParts",
+    "nombrePersonnesCharge",
+    "revenuBrutGlobal",
+    "revenuFiscalReference",
+    "revenuImposable",
+]
+
+ISO_DATE_PATTERN = {'type': 'string', 'pattern': r'\d\d\d\d-\d\d-\d\d'}
+FR_DATE_PATTERN = {'type': 'string', 'pattern': r'\d\d/\d\d/\d\d\d\d'}
+
+VERIFY_SCHEMA_OTHERS = {
+    "montantImpot": {
+        'oneOf': [
+            {'type': 'string'},
+            {'enum': ['Nonimposable']},
+        ]
+    },
+    "situationFamille_simple": {
+        'enum': [
+            'pacs/mariage',
+            'divorce',
+            'celibataire',
+        ]
+    },
+    "dateEtablissement_iso": ISO_DATE_PATTERN,
+    "dateRecouvrement_iso": ISO_DATE_PATTERN,
+    "declarant1__dateNaissance_iso": ISO_DATE_PATTERN,
+    "declarant2__dateNaissance_iso": ISO_DATE_PATTERN,
+    "dateEtablissement": FR_DATE_PATTERN,
+    "dateRecouvrement": FR_DATE_PATTERN,
+    "declarant1__dateNaissance": FR_DATE_PATTERN,
+    "declarant2__dateNaissance": FR_DATE_PATTERN,
+}
+
+VERIFY_SCHEMA_RESPONSE_STRINGS = [
+    'numero_fiscal',
+    'reference_avis',
+    "declarant1",
+    "declarant1__nom",
+    "declarant1__nomNaissance",
+    "declarant1__prenom",
+    "declarant2__nom",
+    "declarant2__nomNaissance",
+    "declarant2__prenom",
+    "foyerFiscal__adresse",
+    "foyerFiscal__adresse1",
+    "foyerFiscal__adresse2",
+    "foyerFiscal__adresse3",
+    "situationFamille",
+    "situationPartielle",
+]
+
+
+def generate_verify_schema_response():
+    schema = {
+        'type': 'object',
+    }
+
+    def set_key(name, value):
+        parts = name.split('__')
+        d = schema
+        for part in parts[:-1]:
+            d = d.setdefault('properties', {}).setdefault(part, {})
+            d['type'] = 'object'
+        d.setdefault('properties', {})[parts[-1]] = value
+
+    for key in VERIFY_SCHEMA_RESPONSE_NUMBERS:
+        set_key(key, {'type': 'number'})
+    for key in VERIFY_SCHEMA_RESPONSE_STRINGS:
+        set_key(key, {'type': 'string'})
+    for key, value in VERIFY_SCHEMA_OTHERS.items():
+        set_key(key, value)
+    return schema
+
+
+VERIFY_RESPONSE_SCHEMA = generate_verify_schema_response()
+
+# Map fields by tr/td indexes
+FIELD_INDEXES = {
+    'declarant1/nom': (1, 1),
+    'declarant2/nom': (1, 2),
+    'declarant1/nomNaissance': (2, 1),
+    'declarant2/nomNaissance': (2, 2),
+    'declarant1/prenom': (3, 1),
+    'declarant2/prenom': (3, 2),
+    'declarant1/dateNaissance': (4, 1),
+    'declarant2/dateNaissance': (4, 2),
+    'declarant1/dateNaissance_iso': (4, 1),
+    'declarant2/dateNaissance_iso': (4, 2),
+    'foyerFiscal/adresse1': (5, 1),
+    'foyerFiscal/adresse2': (6, 1),
+    'foyerFiscal/adresse3': (7, 1),
+    'dateRecouvrement': (9, 1),
+    'dateEtablissement': (10, 1),
+    'dateRecouvrement_iso': (9, 1),
+    'dateEtablissement_iso': (10, 1),
+    'dateRecouvrement_year': (9, 1),
+    'dateEtablissement_year': (10, 1),
+    'nombreParts': (11, 1),
+    'situationFamille': (12, 1),
+    'situationFamille_simple': (12, 1),
+    'nombrePersonnesCharge': (13, 1),
+    'revenuBrutGlobal': (14, 1),
+    'revenuImposable': (15, 1),
+    'impotRevenuNetAvantCorrections': (16, 1),
+    'montantImpot': (17, 1),
+    'revenuFiscalReference': (18, 1),
+}
+
+
+def get_field(name, td_contents, tr_length):
+    # adjust tr/td indexes based on the number of address lines deduced from
+    # the number of tr elements
+    i, j = FIELD_INDEXES[name]
+    # address has 3 lines
+    if tr_length == 19:
+        return td_contents[(i, j)]
+    # address has 2 lines
+    if tr_length == 18:
+        if i < 5:
+            return td_contents[(i, j)]
+        if i == 5:
+            return ''
+        if i > 5:
+            return td_contents[(i - 1, j)]
+    # address has 1 line
+    if tr_length == 17:
+        if i < 5:
+            return td_contents[(i, j)]
+        if i in (5, 6):
+            return ''
+        if i > 6:
+            return td_contents[(i - 2, j)]
+    raise NotImplementedError
+
+
+def nombre_de_parts(value):
+    try:
+        return float(value)
+    except (ValueError, TypeError):
+        return None
+
+
+def euros(value):
+    if not value:
+        return value
+    value = remove_spaces(value)
+    value = value.rstrip('€')
+    try:
+        return int(value)
+    except ValueError:
+        return value
+
+
+def situation_familiale(value):
+    if value == 'Pacs\xe9(e)s':
+        return 'pacs/mariage'
+    if value == 'Mari\xe9(e)s':
+        return 'pacs/mariage'
+    if value == 'Divorc\xe9(e)':
+        return 'divorce'
+    if value == 'C\xe9libataire':
+        return 'celibataire'
+    raise NotImplementedError(value)
+
+
+def date(value):
+    if not value:
+        return ''
+    try:
+        return datetime.datetime.strptime(value, '%d/%m/%Y').date()
+    except (ValueError, TypeError):
+        return ''
+
+
+def year(value):
+    if not value:
+        return ''
+    try:
+        return datetime.datetime.strptime(value, '%d/%m/%Y').date().year
+    except (ValueError, TypeError):
+        return ''
+
+
+ADAPTERS = {
+    'nombreParts': nombre_de_parts,
+    'revenuBrutGlobal': euros,
+    'revenuImposable': euros,
+    'impotRevenuNetAvantCorrections': euros,
+    'revenuFiscalReference': euros,
+    'montantImpot': euros,
+    'situationFamille_simple': situation_familiale,
+    'dateEtablissement_iso': date,
+    'dateRecouvrement_iso': date,
+    'dateEtablissement_year': year,
+    'dateRecouvrement_year': year,
+    'declarant1/dateNaissance_iso': date,
+    'declarant2/dateNaissance_iso': date,
+    'nombrePersonnesCharge': nombre_de_parts,
+}
+
+
+def get_form(session, logger=None):
+    cache_key = 'avis-imposition-form'
+    try:
+        action_url, data = cache.get(cache_key)
+    except TypeError:
+        pass
+    else:
+        return action_url, data
+
+    logger = logger or logging
+    try:
+        response = session.get(AVIS_IMPOSITION_GOUV_FR_URL, timeout=15)
+        response.raise_for_status()
+    except requests.RequestException as e:
+        raise APIError('service-is-down', data=str(e))
+
+    if 'Saisissez les identifiants' not in response.text:
+        logger.error(_('https://cfsmsp.impots.gouv.fr/secavis/: service has changed, %s'), response.text)
+        raise RuntimeError('service has changed')
+
+    html = lxml.html.fromstring(response.content)
+    data = {}
+    for form_elt in html.xpath('//form'):
+        if 'action' not in form_elt.attrib:
+            continue
+        action_url = form_elt.attrib['action']
+        break
+    else:
+        logger.error(
+            _('https://cfsmsp.impots.gouv.fr/secavis/: service has changed, form[action] not found, %s'),
+            response.text,
+        )
+        raise RuntimeError('service has changed')
+    logger.debug('using found action_url %s', action_url)
+
+    fields = ['j_id_7:spi', 'j_id_7:num_facture']
+    for input_elt in html.xpath('//input'):
+        if 'value' in input_elt.attrib or input_elt.attrib['name'] in fields:
+            data[input_elt.attrib['name']] = input_elt.attrib.get('value', '')
+    for field in fields:
+        if field not in data:
+            logger.error(
+                _('https://cfsmsp.impots.gouv.fr/secavis/: service has changed, field %s not found, %s'),
+                field,
+                response.text,
+            )
+            raise RuntimeError('service has changed')
+    cache.set(cache_key, (action_url, data), 180)
+    return action_url, data
+
+
+def get_avis_imposition(session, numero_fiscal, reference_avis, logger=None):
+    logger = logger or logging
+
+    action_url, data = get_form(session, logger=logger)
+
+    data['j_id_7:spi'] = numero_fiscal
+    data['j_id_7:num_facture'] = reference_avis
+
+    url = urllib.parse.urljoin(AVIS_IMPOSITION_GOUV_FR_URL, action_url)
+    try:
+        response = session.post(url, params=data)
+        response.raise_for_status()
+    except requests.RequestException as e:
+        raise APIError('service-is-down', data=str(e))
+
+    if 'Saisissez les identifiants' in response.text:
+        raise NotFound
+
+    response_html = lxml.html.fromstring(response.content)
+    td_contents = {}
+    tr_elements = list(response_html.xpath('//tr'))
+    for i, tr_element in enumerate(tr_elements):
+        for j, td_element in enumerate(tr_element.xpath('td')):
+            td_contents[(i, j)] = simplify_spaces(text_content(td_element).strip())
+
+    logger.debug('got td_contents %s', td_contents)
+
+    data = {
+        # https://github.com/betagouv/svair-api/blob/master/utils/year.js
+        'foyerFiscal/year': int('20' + reference_avis[:2]),
+    }
+    for field, coordinates in FIELD_INDEXES.items():
+        try:
+            data[field] = get_field(field, td_contents, len(tr_elements))
+        except IndexError:
+            logger.error(
+                _(
+                    'https://cfsmsp.impots.gouv.fr/secavis/: service has changed, data field %s(%s) not found, %s'
+                ),
+                field,
+                coordinates,
+                response.text,
+            )
+            raise RuntimeError('service has changed')
+        if field in ADAPTERS:
+            data[field] = ADAPTERS[field](data[field])
+    for situation_partielle_elt in response_html.xpath('//*[@id="situationPartielle"]'):
+        data['situationPartielle'] = text_content(situation_partielle_elt).strip()
+        break
+
+    # add reference number to result
+    data['numero_fiscal'] = numero_fiscal
+    data['reference_avis'] = reference_avis
+
+    # restore structure to the data
+    unflattened = unflatten(data)
+
+    # flatten address for simple use case
+    foyer_fiscal = unflattened['foyerFiscal']
+    foyer_fiscal['adresse'] = ' '.join(
+        value for key, value in sorted(foyer_fiscal.items()) if key.startswith('adresse') and value
+    )
+    return unflattened
+
+
+def get_fake_data(numero_fiscal, reference_avis):
+    fake_data = getattr(settings, 'AVIS_IMPOSITION_FAKE_DATA', [])
+    for data in fake_data or []:
+        if data['numero_fiscal'] == numero_fiscal and data['reference_avis'] == reference_avis:
+            return data
+
+
+class AvisImposition(BaseResource):
+    log_requests_errors = True
+    requests_timeout = 10
+    requests_max_retries = {
+        'total': 5,
+        'backoff_factor': 0.5,
+        'allowed_methods': ['GET', 'POST'],
+        # retry after: 0.5, 1.5 and 3.5 seconds
+        'status_forcelist': [413, 429, 503, 504],
+    }
+
+    category = _('Business Process Connectors')
+
+    class Meta:
+        verbose_name = _('French tax notice validator on impots.gouv.fr')
+
+    @endpoint(
+        perm='can_access',
+        description=_('Get citizen\'s fiscal informations'),
+        parameters={
+            'numero_fiscal': {
+                'description': _('fiscal identifier'),
+                'example_value': '1562456789521',
+            },
+            'reference_avis': {
+                'description': _('tax notice number'),
+                'example_value': '1512456789521',
+            },
+        },
+        json_schema_response=VERIFY_RESPONSE_SCHEMA,
+    )
+    def verify(self, request, numero_fiscal, reference_avis):
+        numero_fiscal = remove_spaces(numero_fiscal)
+        reference_avis = remove_spaces(reference_avis)
+
+        if not (
+            # See.
+            # https://fr.wikipedia.org/wiki/Num%C3%A9ro_d'immatriculation_fiscale#France
+            # a 13 digits decimal number
+            len(numero_fiscal) == 13
+            and numero_fiscal.isascii()
+            and numero_fiscal.isdigit()
+            # No clear information on the format, it seems to be a 13 digits
+            # decimal number too from examples. As we aren´t sure we will ask
+            # for a more than 10 digits long alphanumeric string.
+            and len(reference_avis) >= 10
+            and reference_avis.isascii()
+            and reference_avis.isalnum()
+        ):
+            raise APIError(_('Fiscal identifier or tax notice number are invalid.'))
+
+        cache_key = f'avis-imposition-{numero_fiscal}-{reference_avis}'
+        data = cache.get(cache_key)
+
+        if data == 'not-found':
+            raise NotFound
+
+        if not data:
+            # use test vectors...
+            data = get_fake_data(numero_fiscal=numero_fiscal, reference_avis=reference_avis)
+            # or the real thing.
+            try:
+                data = data or get_avis_imposition(
+                    self.requests, numero_fiscal=numero_fiscal, reference_avis=reference_avis
+                )
+            except NotFound:
+                cache.set(cache_key, 'not-found', 60)
+                raise
+            # service is slow, cache successful response for 12 hours
+            cache.set(cache_key, data, 3600 * 12)
+        return {'data': data}
+
+    def check_status(self):
+        get_form(self.requests)
+
+    def get_test_data(self):
+        fake_data = getattr(settings, 'AVIS_IMPOSITION_FAKE_DATA', [])
+        result = []
+        for data in fake_data or []:
+            try:
+                numero_fiscal = data['numero_fiscal']
+                reference_avis = data['reference_avis']
+                revenu_fiscal_de_reference = data['revenuFiscalReference']
+            except Exception:
+                pass
+            result.append((numero_fiscal, reference_avis, revenu_fiscal_de_reference))
+        return result
--- a/passerelle/apps/avis_imposition/templates/avis_imposition/avisimposition_detail.html
+++ b/passerelle/apps/avis_imposition/templates/avis_imposition/avisimposition_detail.html
@ -0,0 +1,40 @@
+{% extends "passerelle/manage/service_view.html" %}
+{% load i18n passerelle %}
+
+{% block description %}
+  <p>{% blocktrans trimmed %}
+    This connector verify fiscal number and tax notice number on
+    <a href="https://cfsmsp.impots.gouv.fr/secavis">https://cfsmsp.impots.gouv.fr/secavis/</a>
+    and returns the scrapped data.
+  {% endblocktrans %}
+  </p>
+  <p>{% blocktrans trimmed %}
+    <a href="https://www.economie.gouv.fr/particuliers/authenticite-avis-impot-svair">Documentation on the secavis service.</a>
+  {% endblocktrans %}
+  </p>
+  {% with test_data=object.get_test_data %}
+    {% if test_data %}
+      <h4>{% trans "Test datas" %}</h4>
+      <table class="main" style="width: 80%; margin: auto auto;">
+        <thead>
+          <tr>
+            <th>{% trans "Fiscal number" %}</th>
+            <th>{% trans "Tax notice number" %}</th>
+            <th>{% trans "Reference income" %}</th>
+            <th>{% trans "Test URL" %}</th>
+          </tr>
+        </thead>
+        <tbody>
+          {% for numero_fiscal, reference_avis, revenu_fiscal_de_reference in test_data %}
+            <tr>
+              <td>{{ numero_fiscal }}</td>
+              <td>{{ reference_avis }}</td>
+              <td>{{ revenu_fiscal_de_reference}}&nbsp;€</td>
+              <td><a href="verify?numero_fiscal={{ numero_fiscal }}&reference_avis={{ reference_avis }}" class="button">Test</a></td>
+            </tr>
+          {% endfor %}
+        </tbody>
+      </table>
+    {% endif %}
+  {% endwith %}
+{% endblock %}
--- a/passerelle/settings.py
+++ b/passerelle/settings.py
@ -136,6 +136,7 @@ INSTALLED_APPS = (
    'passerelle.apps.astre_rest',
    'passerelle.apps.atal',
    'passerelle.apps.atos_genesys',
+    'passerelle.apps.avis_imposition',
    'passerelle.apps.base_adresse',
    'passerelle.apps.bbb',
    'passerelle.apps.bdp',
--- a/tests/data/avis-imposition.html
+++ b/tests/data/avis-imposition.html
@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"><head>
+  <meta http-equiv="Content-type" content="text/html; charset=UTF-8">
+
+  <title>Impots.gouv.fr - Service de vérification en ligne des avis</title>
+
+  <link href="coin_fichiers/style.css" rel="styleSheet" type="text/css">
+
+  <script type="text/javascript" src="coin_fichiers/fonctions.js"></script>
+
+</head>
+  <body>
+    <div id="conteneur">
+      <div id="barre_haut">
+        <div style="float: left;"><img src="coin_fichiers/bo_seule-2.gif" alt=""></div>
+        <div style="float: right;"><img src="coin_fichiers/bo_seule-3.gif" alt=""></div>
+      </div>
+      <div id="principal">
+        <div id="nav_pro">
+          <b>Bienvenue sur le service de vérification des avis</b>
+        </div>
+
+        <div id="infoService"><p>Le service permet de vérifier l'authenticité des avis (Impôt sur le revenu) présentés par un usager</p></div>
+        <br>
+        <div class="titre"><span>Accès au service de vérification</span></div>
+        <br>
+        <div class="titre2">Saisissez les identifiants</div><form id="j_id_7" name="j_id_7" method="post" action="/secavis/faces/commun/index.jsf" enctype="application/x-www-form-urlencoded">
+          <table>
+            <tbody>
+              <tr>
+                <td width="290">
+                  <br><br>
+                </td>
+              </tr>
+              <tr>
+                <td>
+                  <label>Numéro fiscal *</label><a href="#" onclick="win = ouvrePopup('/secavis/faces/commun/aideSpi.jsf', 523, 375); win.focus();" tabindex="4"><img src="coin_fichiers/pic_aide_pro.gif" alt="aideSPI" style="vertical-align:middle"></a>
+                </td>
+              </tr>
+              <tr>
+                <td><input id="j_id_7:spi" name="j_id_7:spi" type="text" maxlength="13" size="15" tabindex="1" autocomplete="off">
+                </td>
+
+              </tr>
+              <tr>
+                <td></td>
+              </tr>
+              <tr>
+                <td>
+                  <label>Référence de l'avis *</label><a href="#" onclick="win = ouvrePopup('/secavis/faces/commun/aideNumFacture.jsf', 520, 375); win.focus();" tabindex="5"><img src="coin_fichiers/pic_aide_pro.gif" alt="aideReferenceAvis" style="vertical-align:middle"></a>
+                </td>
+              </tr>
+              <tr>
+                <td><input id="j_id_7:num_facture" name="j_id_7:num_facture" type="text" maxlength="13" size="15" tabindex="2" autocomplete="off">
+                </td>
+
+              </tr>
+
+
+              <tr>
+                <td></td>
+              </tr>
+              <tr>
+                <td></td>
+                <td></td>
+
+                <td>
+                  <div align="right">
+
+                    <div class="bloc_boutons"><input id="j_id_7:j_id_l" name="j_id_7:j_id_l" type="submit" value="Valider" title="Vérifier les informations d'avis" class="valider" tabindex="3">
+                    </div>
+
+                  </div>
+                </td>
+              </tr>
+
+            </tbody>
+          </table><input type="hidden" name="j_id_7_SUBMIT" value="1"><input type="hidden" name="javax.faces.ViewState" id="j_id__v_0:javax.faces.ViewState:1" value="RxJe/1JKTJSr3aiM3H9DqZq0DrwqEXsY7Rw4eLRgEBsCF1IALJGqVgWTaQkiKbbdcGDWW774BWUCa/+j2CDznhw1/3bxJteY6ZCui66yNevhkej4xuyrFMte5KQnKORt9JZrOQ=="></form>
+        <br>
+        <div id="donneesObligatoires">* données obligatoires</div>
+      </div>
+      <div id="bas_page">© Ministère de l'Économie et des Finances</div><img src="coin_fichiers/hit.gif" alt="" width="1" height="1">
+    </div>
+
+    <div id="grammalecte_menu_main_button_shadow_host" style="width: 0px; height: 0px;"></div></body><script src="coin_fichiers/api.js"></script></html>
--- a/tests/data/avis-imposition.json
+++ b/tests/data/avis-imposition.json
--- a/tests/test_avis_imposition.py
+++ b/tests/test_avis_imposition.py
@ -0,0 +1,190 @@
+# passerelle - uniform access to multiple data sources and services
+# Copyright (C) 2016 Entr'ouvert
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import json
+import re
+
+import pytest
+import requests
+import responses
+
+from passerelle.apps.avis_imposition import models
+
+from . import utils
+from .test_manager import login
+
+# Content from the form page
+with open('tests/data/avis-imposition.html') as fd:
+    html = fd.read()
+
+# Contents from the submit result page
+with open('tests/data/avis-imposition.json') as fd:
+    cases = json.load(fd)
+
+
+def responses_add(*args, url=re.compile('https://cfsmsp.impots.gouv.fr/secavis/.*'), **kwargs):
+    responses.upsert(*args, url=url, **kwargs)
+
+
+@pytest.fixture
+def avis_imposition(db, settings):
+    from django.core.cache import close_caches
+
+    settings.CACHES['default'] = settings.CACHES['dummy']
+    close_caches()
+    with responses.mock:
+        responses_add(responses.GET, body=html)
+        yield utils.make_resource(models.AvisImposition, slug='test')
+
+
+@responses.activate
+@pytest.mark.parametrize(
+    'data',
+    cases,
+    ids=[
+        ''.join([data['result']['declarant1']['prenom'], data['result']['declarant1']['nom']])
+        for data in cases
+    ],
+)
+def test_ok(avis_imposition, data, app):
+    responses_add(responses.POST, body=data['response'])
+    response = utils.endpoint_get(
+        expected_url='/avis-imposition/test/verify',
+        app=app,
+        resource=avis_imposition,
+        endpoint='verify',
+        params={
+            'numero_fiscal': data['numero_fiscal'],
+            'reference_avis': data['reference_avis'],
+        },
+    )
+    assert response.json['err'] == 0
+    assert response.json['data'] == data['result']
+
+
+@responses.activate
+def test_not_found(avis_imposition, app):
+    responses_add(responses.GET, body=html)
+    responses_add(responses.POST, body=html)
+
+    response = utils.endpoint_get(
+        expected_url='/avis-imposition/test/verify',
+        app=app,
+        resource=avis_imposition,
+        endpoint='verify',
+        params={
+            'numero_fiscal': '1' * 13,
+            'reference_avis': '2' * 13,
+        },
+    )
+    assert response.json['err'] == 1
+    assert response.json['err_desc'] == 'These fiscal number and tax notice number are unknown.'
+
+
+@responses.activate
+@pytest.mark.parametrize(
+    'response_kwargs',
+    [
+        {'method_or_response': responses.GET, 'body': requests.RequestException('boom!')},
+        {'method_or_response': responses.GET, 'status': 500},
+        {'method_or_response': responses.POST, 'body': requests.RequestException('boom!')},
+        {'method_or_response': responses.POST, 'status': 500},
+    ],
+)
+def test_request_error(avis_imposition, app, response_kwargs):
+    responses_add(**response_kwargs)
+
+    response = utils.endpoint_get(
+        expected_url='/avis-imposition/test/verify',
+        app=app,
+        resource=avis_imposition,
+        endpoint='verify',
+        params={
+            'numero_fiscal': '1234567890123',
+            'reference_avis': '0987654321',
+        },
+    )
+    assert response.json['err'] == 1
+    assert response.json['err_desc'] == 'service-is-down'
+
+
+@responses.activate
+def test_fake_data(avis_imposition, app, settings, admin_user):
+    settings.AVIS_IMPOSITION_FAKE_DATA = [
+        {
+            'numero_fiscal': '1' * 13,
+            'reference_avis': '2' * 13,
+            "dateEtablissement": "09/12/2019",
+            "dateEtablissement_iso": "2019-12-09",
+            "dateRecouvrement": "31/12/2019",
+            "dateRecouvrement_iso": "2019-12-31",
+            "dateEtablissement_year": 2019,
+            "dateRecouvrement_year": 2019,
+            "declarant1": {
+                "dateNaissance": "01/01/1970",
+                "dateNaissance_iso": "1970-01-01",
+                "nom": "DOE",
+                "nomNaissance": "DOE",
+                "prenom": "JOHN",
+            },
+            "declarant2": {
+                "dateNaissance": "",
+                "dateNaissance_iso": "",
+                "nom": "DOE",
+                "nomNaissance": "DOE",
+                "prenom": "JANE",
+            },
+            "foyerFiscal": {
+                "adresse": "R\u00c9SIDENCE DU CALVAIRE RUE VICTOR HUGO 75014 PARIS",
+                "adresse1": "R\u00c9SIDENCE DU CALVAIRE",
+                "adresse2": "RUE VICTOR HUGO",
+                "adresse3": "75014 PARIS",
+                "year": 2022,
+            },
+            "impotRevenuNetAvantCorrections": 112,
+            "montantImpot": "Nonimposable",
+            "nombreParts": 4.0,
+            "nombrePersonnesCharge": 4.0,
+            "revenuBrutGlobal": 48473,
+            "revenuFiscalReference": 48473,
+            "revenuImposable": 48473,
+            "situationFamille": "Pacs\u00e9(e)s",
+            "situationFamille_simple": "pacs/mariage",
+            "situationPartielle": "",
+        }
+    ]
+
+    response = utils.endpoint_get(
+        expected_url='/avis-imposition/test/verify',
+        app=app,
+        resource=avis_imposition,
+        endpoint='verify',
+        params={
+            'numero_fiscal': '1' * 13,
+            'reference_avis': '2' * 13,
+        },
+    )
+    assert response.json['err'] == 0
+    assert response.json['data'] == settings.AVIS_IMPOSITION_FAKE_DATA[0]
+
+    # Check that test data are displayed on the backoffice page
+    app = login(app)
+    response = app.get('/avis-imposition/test/')
+    assert 'Test datas' in response
+    assert [
+        [td.text() for td in tr.find('td').items()]
+        for tr in response.pyquery('table').eq(0).find('tbody tr').items()
+    ] == [['1111111111111', '2222222222222', '48473\xa0€', 'Test']]