Confirm change of team member's phone number

app/main/views/manage_users.py

@@ -229,7 +229,15 @@ def edit_user_mobile_number(service_id, user_id):
 @login_required
 @user_has_permissions('manage_service')
 def confirm_edit_user_mobile_number(service_id, user_id):
-    return True
+    user = user_api_client.get_user(user_id)
+    new_number = session['team_member_mobile_change']
+
+    return render_template(
+        'views/manage-users/confirm-edit-user-mobile-number.html',
+        user=user,
+        service_id=service_id,
+        new_mobile_number=new_number
+    )
 
 
 @main.route("/services/<service_id>/cancel-invited-user/<uuid:invited_user_id>", methods=['GET'])

app/templates/views/manage-users/confirm-edit-user-mobile-number.html

@@ -0,0 +1,30 @@
+{% extends "withnav_template.html" %}
+{% from "components/page-footer.html" import page_footer %}
+{% from "components/form.html" import form_wrapper %}
+
+{% block per_page_title %}
+  Confirm change of mobile number
+{% endblock %}
+
+{% block maincolumn_content %}
+
+<h1 class="heading-large">Confirm change of mobile number</h1>
+
+<div class="grid-row">
+  <div class="column-whole">
+  {% call form_wrapper() %}
+    <p>New mobile number:</p>
+    <div class="panel panel-border-wide bottom-gutter">
+      <p>{{ new_mobile_number }}</p>
+    </div>
+    <p>We will send {{ user.name }} an email to tell them about the change.</p>
+    {{ page_footer(
+      'Confirm',
+      destructive=destructive,
+      back_link=url_for('.edit_user_mobile_number', service_id=service_id, user_id=user.id)
+    ) }}
+  {% endcall %}
+  </div>
+</div>
+
+{% endblock %}

tests/app/main/views/test_manage_users.py

@@ -1079,8 +1079,31 @@ def test_edit_user_mobile_number_redirects_to_confirmation(
     )
 
 
-def test_confirm_edit_user_mobile_number_page():
-    pass
+def test_confirm_edit_user_mobile_number_page(
+    logged_in_client,
+    active_user_with_permissions,
+    service_one,
+    mocker,
+    mock_get_user,
+):
+    new_number = '07554080636'
+    with logged_in_client.session_transaction() as session:
+        session['team_member_mobile_change'] = new_number
+    response = logged_in_client.get(url_for(
+        'main.confirm_edit_user_mobile_number',
+        service_id=service_one['id'],
+        user_id=active_user_with_permissions.id
+    ))
+
+    assert response.status_code == 200
+    assert 'Confirm change of mobile number' in response.get_data(as_text=True)
+    for text in [
+        'New mobile number:',
+        new_number,
+        'We will send {} an email to tell them about the change.'.format(active_user_with_permissions.name)
+    ]:
+        assert text in response.get_data(as_text=True)
+    assert 'Confirm' in response.get_data(as_text=True)
 
 
 def test_confirm_edit_user_mobile_number_changes_user_mobile_number():