```ruby
require 'rails_helper'

RSpec.describe PeopleHelper, :type => :helper do
  it "should return a name for each day" do
    expect(day_name(:works_wednesday)).to eql("Wednesday")
  end

  it "should return a symbol for each day" do
    expect(day_symbol(:works_wednesday)).to eql("W")
  end

  it 'should return group breadcrumbs' do
    justice = create(:group, name: 'Justice')
    digital_service = create(:group, parent: justice, name: 'Digital Services')
    expect(group_breadcrumbs(digital_service)).to eql("<a href=\"/groups/justice\">Justice</a> > <a href=\"/groups/digital-services\">Digital Services</a>")
  end
end
```

Add a test for the contact_details helper
user
```ruby
require 'rails_helper'

RSpec.describe PeopleHelper, :type => :helper do
  it "should return a name for each day" do
    expect(day_name(:works_wednesday)).to eql("Wednesday")
  end

  it "should return a symbol for each day" do
    expect(day_symbol(:works_wednesday)).to eql("W")
  end

  it 'should format contact details' do
    person = create(:person, email: 'hello@example.com', phone: '0207 123 45678', mobile: '0777-999-999')
    expect(contact_details(person)).to eql("<a href=\"mailto:hello@example.com\">hello@example.com</a><br/>0207 123 45678<br/>Mob: 0777-999-999")
  end

  it 'should format incomplete contact details' do
    person = create(:person, mobile: '0777-999-999')
    expect(contact_details(person)).to eql("Mob: 0777-999-999")
  end

  it 'should return group breadcrumbs' do
    justice = create(:group, name: 'Justice')
    digital_service = create(:group, parent: justice, name: 'Digital Services')
    expect(group_breadcrumbs(digital_service)).to eql("<a href=\"/groups/justice\">Justice</a> > <a href=\"/groups/digital-services\">Digital Services</a>")
  end
end
```
assistant