Describe section
  Before
    call airline#parts#define_text('text', 'text')
    call airline#parts#define_raw('raw', 'raw')
    call airline#parts#define_function('func', 'SectionSpec')
  End

  It should be able to reference default parts
    let s = airline#section#create(['paste'])
    Assert Equals(s, '%{airline#util#wrap(airline#parts#paste(),0)}')
  End

  It should create sections wIth no separators
    let s = airline#section#create(['text', 'raw', 'func'])
    Assert Equals(s, '%{airline#util#wrap("text",0)}raw%{airline#util#wrap(SectionSpec(),0)}')
  End

  It should create left sections with separators
    let s = airline#section#create_left(['text', 'text'])
    Assert Equals(s, '%{airline#util#wrap("text",0)}%{airline#util#append("text",0)}')
  End

  It should create right sections wIth separators
    let s = airline#section#create_right(['text', 'text'])
    Assert Equals(s, '%{airline#util#prepend("text",0)}%{airline#util#wrap("text",0)}')
  End

  It should prefix with accent group if provided and restore afterwards
    call airline#parts#define('hi', {
          \ 'raw': 'hello',
          \ 'accent': 'red',
          \ })
    let s = airline#section#create(['hi'])
    Assert Equals(s, '%#__accent_red#hello%#__restore__#')
  End

  It should accent functions
    call airline#parts#define_function('hi', 'Hello')
    call airline#parts#define_accent('hi', 'bold')
    let s = airline#section#create(['hi'])
    Assert Equals(s, '%#__accent_bold#%{airline#util#wrap(Hello(),0)}%#__restore__#')
  End

  It should parse out a section from the distro
    call airline#extensions#load()
    let s = airline#section#create(['whitespace'])
    Assert Match(s, 'airline#extensions#whitespace#check')
  End

  It should use parts as is if they are not found
    let s = airline#section#create(['asdf', 'func'])
    Assert Equals(s, 'asdf%{airline#util#wrap(SectionSpec(),0)}')
  End

  It should force add separators for raw and missing keys
    let s = airline#section#create_left(['asdf', 'raw'])
    Assert Equals(s, 'asdf  raw')
    let s = airline#section#create_left(['asdf', 'aaaa', 'raw'])
    Assert Equals(s, 'asdf  aaaa  raw')
    let s = airline#section#create_right(['raw', '%f'])
    Assert Equals(s, 'raw  %f')
    let s = airline#section#create_right(['%t', 'asdf', '%{getcwd()}'])
    Assert Equals(s, '%t  asdf  %{getcwd()}')
  End

  It should empty out parts that do not pass their condition
    call airline#parts#define_text('conditional', 'conditional')
    call airline#parts#define_condition('conditional', '0')
    let s = airline#section#create(['conditional'])
    Assert Equals(s, '%{0 ? airline#util#wrap("conditional",0) : ""}')
  End

  It should not draw two separators after another
    let s = airline#section#create_right(['ffenc','%{strftime("%H:%M")}'])
    Assert Equals(s, '%{airline#util#prepend(airline#parts#ffenc(),0)}%{strftime("%H:%M")}')
  End
End