Add page to archive user

Users can only be archived by Platform Admin from the user page
(/users/<user_id>). This removes them from all services and orgs and
updates their details.

tests/app/main/views/test_find_users.py

@@ -1,3 +1,4 @@
+from bs4 import BeautifulSoup
 from flask import url_for
 from lxml import html
 
@@ -145,3 +146,33 @@ def test_user_information_page_displays_if_there_are_failed_login_attempts(
 
     document = html.fromstring(response.get_data(as_text=True))
     assert document.xpath("//p/text()[normalize-space()='2 failed login attempts']")
+
+
+def test_archive_user_prompts_for_confirmation(
+    logged_in_platform_admin_client,
+    api_user_active,
+    mock_get_organisations_and_services_for_user,
+):
+    response = logged_in_platform_admin_client.get(
+        url_for('main.archive_user', user_id=api_user_active.id)
+    )
+
+    assert response.status_code == 200
+    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
+    assert 'Are you sure you want to archive this user?' in page.find('div', class_='banner-dangerous').text
+
+
+def test_archive_user_posts_to_user_client(
+    logged_in_platform_admin_client,
+    api_user_active,
+    mocker,
+):
+    mock_user_client = mocker.patch('app.user_api_client.post')
+
+    response = logged_in_platform_admin_client.post(
+        url_for('main.archive_user', user_id=api_user_active.id)
+    )
+
+    assert response.status_code == 302
+    assert response.location == url_for('main.user_information', user_id=api_user_active.id, _external=True)
+    mock_user_client.assert_called_once_with('/user/{}/archive'.format(api_user_active.id), data=None)