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Before:
  let g:ale_buffer_loclist_map = {}

Execute (Count should be 0 when data is empty):
  AssertEqual [0, 0], ale#statusline#Count(bufnr('%'))

Before:
  let g:ale_buffer_count_map = {'44': [1, 2]}

Execute (Count should read data from the cache):
  AssertEqual [1, 2], ale#statusline#Count(44)

Execute (Update the cache with new data):
  call ale#statusline#Update(44, [])

Then (The cache should reflect the new data):
  AssertEqual [0, 0], ale#statusline#Count(44)

Before:
  let g:ale_buffer_loclist_map = {'1': [{'lnum': 1, 'bufnr': 1, 'vcol': 0, 'linter_name': 'testlinter', 'nr': -1, 'type': 'E', 'col': 1, 'text': 'Test Error'}]}

Execute (Count should be match the loclist):
  AssertEqual [1, 0], ale#statusline#Count(1)

Execute (Output should be empty for non-existant buffer):
  AssertEqual [0, 0], ale#statusline#Count(9001)

Before:
  let g:ale_statusline_format = ['%sE', '%sW', 'OKIE']

Execute (Given some errors):
  call ale#statusline#Update(bufnr('%'), [{'type': 'E'}, {'type': 'E'}])
Then (Statusline is formatted to the users preference):
  AssertEqual '2E', ale#statusline#Status()

Execute (Given some warnings):
  call ale#statusline#Update(bufnr('%'), [{'type': 'W'}, {'type': 'W'}, {'type': 'W'}])
Then (Statusline is formatted to the users preference):
  AssertEqual '3W', ale#statusline#Status()

Execute (Given some warnings, and errors):
  call ale#statusline#Update(bufnr('%'), [{'type': 'E'}, {'type': 'W'}, {'type': 'W'}])
Then (Statusline is formatted to the users preference):
  AssertEqual '1E 2W', ale#statusline#Status()

Execute (Given a lack of data):
  call ale#statusline#Update(bufnr('%'), [])
Then (Statusline is formatted to the users preference):
  AssertEqual 'OKIE', ale#statusline#Status()