Tests for various python features.     vim: set ft=vim :

STARTTEST
:so small.vim
:set noswapfile
:if !has('python3') | e! test.ok | wq! test.out | endif
:lang C
:fun Test()
:py3 import vim
:let l = []
:py3 l=vim.bindeval('l')
:py3 f=vim.bindeval('function("strlen")')
:" Extending List directly with different types
:py3 l+=[1, "as'd", [1, 2, f, {'a': 1}]]
:$put =string(l)
:$put =string(l[-1])
:try
:  $put =string(l[-4])
:catch
:  $put =v:exception[:13]
:endtry
:" List assignment
:py3 l[0]=0
:$put =string(l)
:py3 l[-2]=f
:$put =string(l)
:"
:" Extending Dictionary directly with different types
:let d = {}
:fun d.f()
:  return 1
:endfun
py3 << EOF
d=vim.bindeval('d')
d['1']='asd'
d.update()  # Must not do anything, including throwing errors
d.update(b=[1, 2, f])
d.update((('-1', {'a': 1}),))
d.update({'0': -1})
dk = d.keys()
dv = d.values()
di = d.items()
dk.sort(key=repr)
dv.sort(key=repr)
di.sort(key=repr)
EOF
:$put =py3eval('d[''f''](self={})')
:$put =py3eval('repr(dk)')
:$put =substitute(py3eval('repr(dv)'),'0x\x\+','','g')
:$put =substitute(py3eval('repr(di)'),'0x\x\+','','g')
:for [key, Val] in sort(items(d))
:  $put =string(key) . ' : ' . string(Val)
:  unlet key Val
:endfor
:py3 del dk
:py3 del di
:py3 del dv
:"
:" removing items with del
:py3 del l[2]
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:try
:   py3 del l[:3]
:   py3 del l[1:]
:catch
:   $put =v:exception
:endtry
:$put =string(l)
:"
:py3 del d['-1']
:py3 del d['f']
:$put =string(py3eval('d.get(''b'', 1)'))
:$put =string(py3eval('d.pop(''b'')'))
:$put =string(py3eval('d.get(''b'', 1)'))
:$put =string(py3eval('d.pop(''1'', 2)'))
:$put =string(py3eval('d.pop(''1'', 2)'))
:$put =py3eval('repr(d.has_key(''0''))')
:$put =py3eval('repr(d.has_key(''1''))')
:$put =py3eval('repr(''0'' in d)')
:$put =py3eval('repr(''1'' in d)')
:$put =py3eval('repr(list(iter(d)))')
:$put =string(d)
:$put =py3eval('repr(d.popitem())')
:$put =py3eval('repr(d.get(''0''))')
:$put =py3eval('repr(list(iter(d)))')
:"
:" removing items out of range: silently skip items that don't exist
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:" The following two ranges delete nothing as they match empty list:
:py3 del l[2:1]
:$put =string(l)
:py3 del l[2:2]
:$put =string(l)
:py3 del l[2:3]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[2:4]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[2:5]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[2:6]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:" The following two ranges delete nothing as they match empty list:
:py3 del l[-1:2]
:$put =string(l)
:py3 del l[-2:2]
:$put =string(l)
:py3 del l[-3:2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[-4:2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[-5:2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[-6:2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[::2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[3:0:-2]
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 del l[2:4:-2]
:$put =string(l)
:"
:" Slice assignment to a list
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[0:0]=['a']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[1:2]=['b']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[2:4]=['c']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[4:4]=['d']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[-1:2]=['e']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[-10:2]=['f']
:$put =string(l)
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:py3 l[2:-10]=['g']
:$put =string(l)
:let l = []
:py3 l=vim.bindeval('l')
:py3 l[0:0]=['h']
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:py3 l[2:6:2] = [10, 20]
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:py3 l[6:2:-2] = [10, 20]
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:py3 l[6:2] = ()
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:py3 l[6:2:1] = ()
:$put =string(l)
:let l = range(8)
:py3 l=vim.bindeval('l')
:py3 l[2:2:1] = ()
:$put =string(l)
:"
:" Locked variables
:let l = [0, 1, 2, 3]
:py3 l=vim.bindeval('l')
:lockvar! l
:py3 l[2]='i'
:$put =string(l)
:unlockvar! l
:"
:" Function calls
py3 << EOF
import sys
import re

py33_type_error_pattern = re.compile('^__call__\(\) takes (\d+) positional argument but (\d+) were given$')

def ee(expr, g=globals(), l=locals()):
    cb = vim.current.buffer
    try:
        try:
            exec(expr, g, l)
        except Exception as e:
            if sys.version_info >= (3, 3) and e.__class__ is AttributeError and str(e).find('has no attribute')>=0 and not str(e).startswith("'vim."):
                cb.append(expr + ':' + repr((e.__class__, AttributeError(str(e)[str(e).rfind(" '") + 2:-1]))))
            elif sys.version_info >= (3, 3) and e.__class__ is ImportError and str(e).find('No module named \'') >= 0:
                cb.append(expr + ':' + repr((e.__class__, ImportError(str(e).replace("'", '')))))
            elif sys.version_info >= (3, 3) and e.__class__ is TypeError:
                m = py33_type_error_pattern.search(str(e))
                if m:
                    msg = '__call__() takes exactly {0} positional argument ({1} given)'.format(m.group(1), m.group(2))
                    cb.append(expr + ':' + repr((e.__class__, TypeError(msg))))
                else:
                    cb.append(expr + ':' + repr((e.__class__, e)))
            else:
                cb.append(expr + ':' + repr((e.__class__, e)))
        else:
            cb.append(expr + ':NOT FAILED')
    except Exception as e:
        cb.append(expr + '::' + repr((e.__class__, e)))
EOF
:fun New(...)
:   return ['NewStart']+a:000+['NewEnd']
:endfun
:fun DictNew(...) dict
:   return ['DictNewStart']+a:000+['DictNewEnd', self]
:endfun
:let l=[function('New'), function('DictNew')]
:py3 l=vim.bindeval('l')
:py3 l.extend(list(l[0](1, 2, 3)))
:$put =string(l)
:py3 l.extend(list(l[1](1, 2, 3, self={'a': 'b'})))
:$put =string(l)
:py3 l+=[l[0].name]
:$put =string(l)
:py3 ee('l[1](1, 2, 3)')
:py3 f=l[0]
:delfunction New
:py3 ee('f(1, 2, 3)')
:if has('float')
:   let l=[0.0]
:   py3 l=vim.bindeval('l')
:   py3 l.extend([0.0])
:   $put =string(l)
:else
:   $put ='[0.0, 0.0]'
:endif
:let messages=[]
:delfunction DictNew
py3 <<EOF
d=vim.bindeval('{}')
m=vim.bindeval('messages')
def em(expr, g=globals(), l=locals()):
    try:
        exec(expr, g, l)
    except Exception as e:
        m.extend([e.__class__.__name__])

em('d["abc1"]')
em('d["abc1"]="\\0"')
em('d["abc1"]=vim')
em('d[""]=1')
em('d["a\\0b"]=1')
em('d[b"a\\0b"]=1')

em('d.pop("abc1")')
em('d.popitem()')
del em
del m
EOF
:$put =messages
:unlet messages
:" locked and scope attributes
:let d={} | let dl={} | lockvar dl
:for s in split("d dl v: g:")
:    let name=tr(s, ':', 's')
:    execute 'py3 '.name.'=vim.bindeval("'.s.'")'
:    let toput=s.' : '.join(map(['locked', 'scope'], 'v:val.":".py3eval(name.".".v:val)'), ';')
:    $put =toput
:endfor
:silent! let d.abc2=1
:silent! let dl.abc3=1
:py3 d.locked=True
:py3 dl.locked=False
:silent! let d.def=1
:silent! let dl.def=1
:put ='d:'.string(d)
:put ='dl:'.string(dl)
:unlet d dl
:
:let l=[] | let ll=[] | lockvar ll
:for s in split("l ll")
:    let name=tr(s, ':', 's')
:    execute 'py3 '.name.'=vim.bindeval("'.s.'")'
:    let toput=s.' : locked:'.py3eval(name.'.locked')
:    $put =toput
:endfor
:silent! call extend(l, [0])
:silent! call extend(ll, [0])
:py3 l.locked=True
:py3 ll.locked=False
:silent! call extend(l, [1])
:silent! call extend(ll, [1])
:put ='l:'.string(l)
:put ='ll:'.string(ll)
:unlet l ll
:"
:" py3eval()
:let l=py3eval('[0, 1, 2]')
:$put =string(l)
:let d=py3eval('{"a": "b", "c": 1, "d": ["e"]}')
:$put =sort(items(d))
:if has('float')
:   let f=py3eval('0.0')
:   $put =string(f)
:else
:   $put ='0.0'
:endif
:" Invalid values:
:for e in ['"\0"', '{"\0": 1}', 'undefined_name', 'vim']
:   try
:      let v=py3eval(e)
:   catch
:      let toput=e.":\t".v:exception[:13]
:      $put =toput
:   endtry
:endfor
:"
:" threading
:let l = [0]
:py3 l=vim.bindeval('l')
py3 <<EOF
import threading
import time

class T(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.t = 0
        self.running = True

    def run(self):
        while self.running:
            self.t += 1
            time.sleep(0.1)

t = T()
del T
t.start()
EOF
:sleep 1
:py3 t.running = False
:py3 t.join()
:" Check if the background thread is working.  Count should be 10, but on a
:" busy system (AppVeyor) it can be much lower.
:py3 l[0] = t.t > 4
:py3 del time
:py3 del threading
:py3 del t
:$put =string(l)
:"
:" settrace
:let l = []
:py3 l=vim.bindeval('l')
py3 <<EOF
import sys

def traceit(frame, event, arg):
    global l
    if event == "line":
        l += [frame.f_lineno]
    return traceit

def trace_main():
    for i in range(5):
        pass
EOF
:py3 sys.settrace(traceit)
:py3 trace_main()
:py3 sys.settrace(None)
:py3 del traceit
:py3 del trace_main
:$put =string(l)
:"
:" Slice
:py3 ll = vim.bindeval('[0, 1, 2, 3, 4, 5]')
:py3 l = ll[:4]
:$put =string(py3eval('l'))
:py3 l = ll[2:]
:$put =string(py3eval('l'))
:py3 l = ll[:-4]
:$put =string(py3eval('l'))
:py3 l = ll[-2:]
:$put =string(py3eval('l'))
:py3 l = ll[2:4]
:$put =string(py3eval('l'))
:py3 l = ll[4:2]
:$put =string(py3eval('l'))
:py3 l = ll[-4:-2]
:$put =string(py3eval('l'))
:py3 l = ll[-2:-4]
:$put =string(py3eval('l'))
:py3 l = ll[:]
:$put =string(py3eval('l'))
:py3 l = ll[0:6]
:$put =string(py3eval('l'))
:py3 l = ll[-10:10]
:$put =string(py3eval('l'))
:py3 l = ll[4:2:-1]
:$put =string(py3eval('l'))
:py3 l = ll[::2]
:$put =string(py3eval('l'))
:py3 l = ll[4:2:1]
:$put =string(py3eval('l'))
:py3 del l
:"
:" Vars
:let g:foo = 'bac'
:let w:abc3 = 'def'
:let b:baz = 'bar'
:let t:bar = 'jkl'
:try
:  throw "Abc"
:catch
:  put =py3eval('vim.vvars[''exception'']')
:endtry
:put =py3eval('vim.vars[''foo'']')
:put =py3eval('vim.current.window.vars[''abc3'']')
:put =py3eval('vim.current.buffer.vars[''baz'']')
:put =py3eval('vim.current.tabpage.vars[''bar'']')
:"
:" Options
:" paste:          boolean, global
:" previewheight   number,  global
:" operatorfunc:   string,  global
:" number:         boolean, window-local
:" numberwidth:    number,  window-local
:" colorcolumn:    string,  window-local
:" statusline:     string,  window-local/global
:" autoindent:     boolean, buffer-local
:" shiftwidth:     number,  buffer-local
:" omnifunc:       string,  buffer-local
:" preserveindent: boolean, buffer-local/global
:" path:           string,  buffer-local/global
:let g:bufs=[bufnr('%')]
:new
:let g:bufs+=[bufnr('%')]
:vnew
:let g:bufs+=[bufnr('%')]
:wincmd j
:vnew
:let g:bufs+=[bufnr('%')]
:wincmd l
:fun RecVars(opt)
:  let gval =string(eval('&g:'.a:opt))
:  let wvals=join(map(range(1, 4),  'v:val.":".string(getwinvar(v:val, "&".a:opt))'))
:  let bvals=join(map(copy(g:bufs), 'v:val.":".string(getbufvar(v:val, "&".a:opt))'))
:  put ='  G: '.gval
:  put ='  W: '.wvals
:  put ='  B: '.wvals
:endfun
py3 << EOF
def e(s, g=globals(), l=locals()):
    try:
        exec(s, g, l)
    except Exception as e:
        vim.command('return ' + repr(e.__class__.__name__))

def ev(s, g=globals(), l=locals()):
    try:
        return eval(s, g, l)
    except Exception as e:
        vim.command('let exc=' + repr(e.__class__.__name__))
        return 0
EOF
:fun E(s)
:   python3 e(vim.eval('a:s'))
:endfun
:fun Ev(s)
:   let r=py3eval('ev(vim.eval("a:s"))')
:   if exists('exc')
:       throw exc
:   endif
:   return r
:endfun
:py3 gopts1=vim.options
:py3 wopts1=vim.windows[2].options
:py3 wopts2=vim.windows[0].options
:py3 wopts3=vim.windows[1].options
:py3 bopts1=vim.buffers[vim.bindeval("g:bufs")[2]].options
:py3 bopts2=vim.buffers[vim.bindeval("g:bufs")[1]].options
:py3 bopts3=vim.buffers[vim.bindeval("g:bufs")[0]].options
:$put ='wopts iters equal: '.py3eval('list(wopts1) == list(wopts2)')
:$put ='bopts iters equal: '.py3eval('list(bopts1) == list(bopts2)')
:py3 gset=set(iter(gopts1))
:py3 wset=set(iter(wopts1))
:py3 bset=set(iter(bopts1))
:set path=.,..,,
:let lst=[]
:let lst+=[['paste',          1,     0,     1,     2,      1,    1,      0    ]]
:let lst+=[['previewheight',  5,     1,     6,     'a',    0,    1,      0    ]]
:let lst+=[['operatorfunc',   'A',   'B',   'C',   2,      0,    1,      0    ]]
:let lst+=[['number',         0,     1,     1,     0,      1,    0,      1    ]]
:let lst+=[['numberwidth',    2,     3,     5,     -100,   0,    0,      1    ]]
:let lst+=[['colorcolumn',    '+1',  '+2',  '+3',  'abc4',  0,    0,      1    ]]
:let lst+=[['statusline',     '1',   '2',   '4',   0,      0,    1,      1    ]]
:let lst+=[['autoindent',     0,     1,     1,     2,      1,    0,      2    ]]
:let lst+=[['shiftwidth',     0,     2,     1,     3,      0,    0,      2    ]]
:let lst+=[['omnifunc',       'A',   'B',   'C',   1,      0,    0,      2    ]]
:let lst+=[['preserveindent', 0,     1,     1,     2,      1,    1,      2    ]]
:let lst+=[['path',           '.,,', ',,',  '.',   0,      0,    1,      2    ]]
:for       [oname,            oval1, oval2, oval3, invval, bool, global, local] in lst
:   py3 oname=vim.eval('oname')
:   py3 oval1=vim.bindeval('oval1')
:   py3 oval2=vim.bindeval('oval2')
:   py3 oval3=vim.bindeval('oval3')
:   if invval is 0 || invval is 1
:       py3 invval=bool(vim.bindeval('invval'))
:   else
:       py3 invval=vim.bindeval('invval')
:   endif
:   if bool
:       py3 oval1=bool(oval1)
:       py3 oval2=bool(oval2)
:       py3 oval3=bool(oval3)
:   endif
:   put ='>>> '.oname
:   $put ='  g/w/b:'.py3eval('oname in gset').'/'.py3eval('oname in wset').'/'.py3eval('oname in bset')
:   $put ='  g/w/b (in):'.py3eval('oname in gopts1').'/'.py3eval('oname in wopts1').'/'.py3eval('oname in bopts1')
:   for v in ['gopts1', 'wopts1', 'bopts1']
:       try
:           put ='  p/'.v.': '.Ev('repr('.v.'['''.oname.'''])')
:       catch
:           put ='  p/'.v.'! '.v:exception
:       endtry
:       let r=E(v.'['''.oname.''']=invval')
:       if r isnot 0
:           put ='  inv: '.string(invval).'! '.r
:       endif
:       for vv in (v is# 'gopts1' ? [v] : [v, v[:-2].'2', v[:-2].'3'])
:           let val=substitute(vv, '^.opts', 'oval', '')
:           let r=E(vv.'['''.oname.''']='.val)
:           if r isnot 0
:               put ='  '.vv.'! '.r
:           endif
:       endfor
:   endfor
:   call RecVars(oname)
:   for v in ['wopts3', 'bopts3']
:       let r=E('del '.v.'["'.oname.'"]')
:       if r isnot 0
:           put ='  del '.v.'! '.r
:       endif
:   endfor
:   call RecVars(oname)
:endfor
:delfunction RecVars
:delfunction E
:delfunction Ev
:py3 del ev
:py3 del e
:only
:for buf in g:bufs[1:]
:   execute 'bwipeout!' buf
:endfor
:py3 del gopts1
:py3 del wopts1
:py3 del wopts2
:py3 del wopts3
:py3 del bopts1
:py3 del bopts2
:py3 del bopts3
:py3 del oval1
:py3 del oval2
:py3 del oval3
:py3 del oname
:py3 del invval
:"
:" Test buffer object
:vnew
:put ='First line'
:put ='Second line'
:put ='Third line'
:1 delete _
:py3 b=vim.current.buffer
:wincmd w
:mark a
:augroup BUFS
:   autocmd BufFilePost * python3 cb.append(vim.eval('expand("<abuf>")') + ':BufFilePost:' + vim.eval('bufnr("%")'))
:   autocmd BufFilePre * python3 cb.append(vim.eval('expand("<abuf>")') + ':BufFilePre:' + vim.eval('bufnr("%")'))
:augroup END
py3 << EOF
cb = vim.current.buffer
# Tests BufferAppend and BufferItem
cb.append(b[0])
# Tests BufferSlice and BufferAssSlice
cb.append('abc5') # Will be overwritten
cb[-1:] = b[:-2]
# Test BufferLength and BufferAssSlice
cb.append('def') # Will not be overwritten
cb[len(cb):] = b[:]
# Test BufferAssItem and BufferMark
cb.append('ghi') # Will be overwritten
cb[-1] = repr((len(cb) - cb.mark('a')[0], cb.mark('a')[1]))
# Test BufferRepr
cb.append(repr(cb) + repr(b))
# Modify foreign buffer
b.append('foo')
b[0]='bar'
b[0:0]=['baz']
vim.command('call append("$", getbufline(%i, 1, "$"))' % b.number)
# Test assigning to name property
import os
old_name = cb.name
cb.name = 'foo'
cb.append(cb.name[-11:].replace(os.path.sep, '/'))
b.name = 'bar'
cb.append(b.name[-11:].replace(os.path.sep, '/'))
cb.name = old_name
cb.append(cb.name[-17:].replace(os.path.sep, '/'))
del old_name
# Test CheckBuffer
for _b in vim.buffers:
    if _b is not cb:
        vim.command('bwipeout! ' + str(_b.number))
del _b
cb.append('valid: b:%s, cb:%s' % (repr(b.valid), repr(cb.valid)))
for expr in ('b[1]','b[:] = ["A", "B"]','b[:]','b.append("abc6")'):
    try:
        exec(expr)
    except vim.error:
        pass
    else:
        # Usually a SEGV here
        # Should not happen in any case
        cb.append('No exception for ' + expr)
vim.command('cd .')
del b
EOF
:"
:" Test vim.buffers object
:set hidden
:edit a
:buffer #
:edit b
:buffer #
:edit c
:buffer #
py3 << EOF
# Check GCing iterator that was not fully exhausted
i = iter(vim.buffers)
cb.append('i:' + str(next(i)))
# and also check creating more than one iterator at a time
i2 = iter(vim.buffers)
cb.append('i2:' + str(next(i2)))
cb.append('i:' + str(next(i)))
# The following should trigger GC and not cause any problems
del i
del i2
i3 = iter(vim.buffers)
cb.append('i3:' + str(next(i3)))
del i3

prevnum = 0
for b in vim.buffers:
    # Check buffer order
    if prevnum >= b.number:
        cb.append('!!! Buffer numbers not in strictly ascending order')
    # Check indexing: vim.buffers[number].number == number
    cb.append(str(b.number) + ':' + repr(vim.buffers[b.number]) + '=' + repr(b))
    prevnum = b.number
del prevnum

cb.append(str(len(vim.buffers)))

bnums = list(map(lambda b: b.number, vim.buffers))[1:]

# Test wiping out buffer with existing iterator
i4 = iter(vim.buffers)
cb.append('i4:' + str(next(i4)))
vim.command('bwipeout! ' + str(bnums.pop(0)))
try:
    next(i4)
except vim.error:
    pass
else:
    cb.append('!!!! No vim.error')
i4 = iter(vim.buffers)
vim.command('bwipeout! ' + str(bnums.pop(-1)))
vim.command('bwipeout! ' + str(bnums.pop(-1)))
cb.append('i4:' + str(next(i4)))
try:
    next(i4)
except StopIteration:
    cb.append('StopIteration')
del i4
del bnums
EOF
:"
:" Test vim.{tabpage,window}list and vim.{tabpage,window} objects
:tabnew 0
:tabnew 1
:vnew a.1
:tabnew 2
:vnew a.2
:vnew b.2
:vnew c.2
py3 << EOF
cb.append('Number of tabs: ' + str(len(vim.tabpages)))
cb.append('Current tab pages:')

def W(w):
    if '(unknown)' in repr(w):
        return '<window object (unknown)>'
    else:
        return repr(w)

def Cursor(w, start=len(cb)):
    if w.buffer is cb:
        return repr((start - w.cursor[0], w.cursor[1]))
    else:
        return repr(w.cursor)

for t in vim.tabpages:
    cb.append('  ' + repr(t) + '(' + str(t.number) + ')' + ': ' + str(len(t.windows)) + ' windows, current is ' + W(t.window))
    cb.append('  Windows:')
    for w in t.windows:
        cb.append('    ' + W(w) + '(' + str(w.number) + ')' + ': displays buffer ' + repr(w.buffer) + '; cursor is at ' + Cursor(w))
        # Other values depend on the size of the terminal, so they are checked partly:
        for attr in ('height', 'row', 'width', 'col'):
            try:
                aval = getattr(w, attr)
                if type(aval) is not int:
                    raise TypeError
                if aval < 0:
                    raise ValueError
            except Exception as e:
                cb.append('!!!!!! Error while getting attribute ' + attr + ': ' + e.__class__.__name__)
        del aval
        del attr
        w.cursor = (len(w.buffer), 0)
del W
del Cursor
cb.append('Number of windows in current tab page: ' + str(len(vim.windows)))
if list(vim.windows) != list(vim.current.tabpage.windows):
    cb.append('!!!!!! Windows differ')
EOF
:"
:" Test vim.current
py3 << EOF
def H(o):
    return repr(o)
cb.append('Current tab page: ' + repr(vim.current.tabpage))
cb.append('Current window: ' + repr(vim.current.window) + ': ' + H(vim.current.window) + ' is ' + H(vim.current.tabpage.window))
cb.append('Current buffer: ' + repr(vim.current.buffer) + ': ' + H(vim.current.buffer) + ' is ' + H(vim.current.window.buffer)+ ' is ' + H(vim.current.tabpage.window.buffer))
del H
# Assigning: fails
try:
    vim.current.window = vim.tabpages[0].window
except ValueError:
    cb.append('ValueError at assigning foreign tab window')

for attr in ('window', 'tabpage', 'buffer'):
    try:
        setattr(vim.current, attr, None)
    except TypeError:
        cb.append('Type error at assigning None to vim.current.' + attr)
del attr

# Assigning: success
vim.current.tabpage = vim.tabpages[-2]
vim.current.buffer = cb
vim.current.window = vim.windows[0]
vim.current.window.cursor = (len(vim.current.buffer), 0)
cb.append('Current tab page: ' + repr(vim.current.tabpage))
cb.append('Current window: ' + repr(vim.current.window))
cb.append('Current buffer: ' + repr(vim.current.buffer))
cb.append('Current line: ' + repr(vim.current.line))
ws = list(vim.windows)
ts = list(vim.tabpages)
for b in vim.buffers:
    if b is not cb:
        vim.command('bwipeout! ' + str(b.number))
del b
cb.append('w.valid: ' + repr([w.valid for w in ws]))
cb.append('t.valid: ' + repr([t.valid for t in ts]))
del w
del t
del ts
del ws
EOF
:tabonly!
:only!
:"
:" Test types
py3 << EOF
for expr, attr in (
    ('vim.vars',                         'Dictionary'),
    ('vim.options',                      'Options'),
    ('vim.bindeval("{}")',               'Dictionary'),
    ('vim.bindeval("[]")',               'List'),
    ('vim.bindeval("function(\'tr\')")', 'Function'),
    ('vim.current.buffer',               'Buffer'),
    ('vim.current.range',                'Range'),
    ('vim.current.window',               'Window'),
    ('vim.current.tabpage',              'TabPage'),
):
    cb.append(expr + ':' + attr + ':' + repr(type(eval(expr)) is getattr(vim, attr)))
del expr
del attr
EOF
:"
:" Test __dir__() method
py3 << EOF
for name, o in (
        ('current',    vim.current),
        ('buffer',     vim.current.buffer),
        ('window',     vim.current.window),
        ('tabpage',    vim.current.tabpage),
        ('range',      vim.current.range),
        ('dictionary', vim.bindeval('{}')),
        ('list',       vim.bindeval('[]')),
        ('function',   vim.bindeval('function("tr")')),
        ('output',     sys.stdout),
    ):
    cb.append(name + ':' + ','.join(dir(o)))
del name
del o
EOF
:"
:" Test vim.*.__new__
:$put =string(py3eval('vim.Dictionary({})'))
:$put =string(py3eval('vim.Dictionary(a=1)'))
:$put =string(py3eval('vim.Dictionary(((''a'', 1),))'))
:$put =string(py3eval('vim.List()'))
:$put =string(py3eval('vim.List(iter(''abc7''))'))
:$put =string(py3eval('vim.Function(''tr'')'))
:"
:" Test stdout/stderr
:redir => messages
:py3 sys.stdout.write('abc8') ; sys.stdout.write('def')
:py3 sys.stderr.write('abc9') ; sys.stderr.write('def')
:py3 sys.stdout.writelines(iter('abcA'))
:py3 sys.stderr.writelines(iter('abcB'))
:redir END
:$put =string(substitute(messages, '\d\+', '', 'g'))
:" Test subclassing
:fun Put(...)
:   $put =string(a:000)
:   return a:000
:endfun
py3 << EOF
class DupDict(vim.Dictionary):
    def __setitem__(self, key, value):
        super(DupDict, self).__setitem__(key, value)
        super(DupDict, self).__setitem__('dup_' + key, value)
dd = DupDict()
dd['a'] = 'b'

class DupList(vim.List):
    def __getitem__(self, idx):
        return [super(DupList, self).__getitem__(idx)] * 2

dl = DupList()
dl2 = DupList(iter('abcC'))
dl.extend(dl2[0])

class DupFun(vim.Function):
    def __call__(self, arg):
        return super(DupFun, self).__call__(arg, arg)

df = DupFun('Put')
EOF
:$put =string(sort(keys(py3eval('dd'))))
:$put =string(py3eval('dl'))
:$put =string(py3eval('dl2'))
:$put =string(py3eval('df(2)'))
:$put =string(py3eval('dl') is# py3eval('dl'))
:$put =string(py3eval('dd') is# py3eval('dd'))
:$put =string(py3eval('df'))
:delfunction Put
py3 << EOF
del DupDict
del DupList
del DupFun
del dd
del dl
del dl2
del df
EOF
:"
:" Test chdir
py3 << EOF
import os
fnamemodify = vim.Function('fnamemodify')
cb.append(str(fnamemodify('.', ':p:h:t')))
cb.append(vim.eval('@%'))
os.chdir('..')
path = fnamemodify('.', ':p:h:t')
if path != b'src':
  # Running tests from a shadow directory, so move up another level
  # This will result in @% looking like shadow/testdir/test87.in, hence the
  # slicing to remove the leading path and path separator
  os.chdir('..')
  cb.append(str(fnamemodify('.', ':p:h:t')))
  cb.append(vim.eval('@%')[len(path)+1:].replace(os.path.sep, '/'))
  os.chdir(path)
else:
  cb.append(str(fnamemodify('.', ':p:h:t')))
  cb.append(vim.eval('@%').replace(os.path.sep, '/'))
del path
os.chdir('testdir')
cb.append(str(fnamemodify('.', ':p:h:t')))
cb.append(vim.eval('@%'))
del fnamemodify
EOF
:"
:" Test errors
:fun F() dict
:endfun
:fun D()
:endfun
py3 << EOF
d = vim.Dictionary()
ned = vim.Dictionary(foo='bar', baz='abcD')
dl = vim.Dictionary(a=1)
dl.locked = True
l = vim.List()
ll = vim.List('abcE')
ll.locked = True
nel = vim.List('abcO')
f = vim.Function('string')
fd = vim.Function('F')
fdel = vim.Function('D')
vim.command('delfunction D')

def subexpr_test(expr, name, subexprs):
    cb.append('>>> Testing %s using %s' % (name, expr))
    for subexpr in subexprs:
        ee(expr % subexpr)
    cb.append('<<< Finished')

def stringtochars_test(expr):
    return subexpr_test(expr, 'StringToChars', (
        '1',       # Fail type checks
        'b"\\0"',  # Fail PyString_AsStringAndSize(object, , NULL) check
        '"\\0"',   # Fail PyString_AsStringAndSize(bytes, , NULL) check
    ))

class Mapping(object):
    def __init__(self, d):
        self.d = d

    def __getitem__(self, key):
        return self.d[key]

    def keys(self):
        return self.d.keys()

    def items(self):
        return self.d.items()

def convertfrompyobject_test(expr, recurse=True):
    # pydict_to_tv
    stringtochars_test(expr % '{%s : 1}')
    if recurse:
        convertfrompyobject_test(expr % '{"abcF" : %s}', False)
    # pymap_to_tv
    stringtochars_test(expr % 'Mapping({%s : 1})')
    if recurse:
        convertfrompyobject_test(expr % 'Mapping({"abcG" : %s})', False)
    # pyseq_to_tv
    iter_test(expr)
    return subexpr_test(expr, 'ConvertFromPyObject', (
        'None',                 # Not conversible
        '{b"": 1}',             # Empty key not allowed
        '{"": 1}',              # Same, but with unicode object
        'FailingMapping()',     #
        'FailingMappingKey()',  #
        'FailingNumber()',      #
    ))

def convertfrompymapping_test(expr):
    convertfrompyobject_test(expr)
    return subexpr_test(expr, 'ConvertFromPyMapping', (
        '[]',
    ))

def iter_test(expr):
    return subexpr_test(expr, '*Iter*', (
        'FailingIter()',
        'FailingIterNext()',
    ))

def number_test(expr, natural=False, unsigned=False):
    if natural:
        unsigned = True
    return subexpr_test(expr, 'NumberToLong', (
        '[]',
        'None',
    ) + (('-1',) if unsigned else ())
    + (('0',) if natural else ()))

class FailingTrue(object):
    def __bool__(self):
        raise NotImplementedError('bool')

class FailingIter(object):
    def __iter__(self):
        raise NotImplementedError('iter')

class FailingIterNext(object):
    def __iter__(self):
        return self

    def __next__(self):
        raise NotImplementedError('next')

class FailingIterNextN(object):
    def __init__(self, n):
        self.n = n

    def __iter__(self):
        return self

    def __next__(self):
        if self.n:
            self.n -= 1
            return 1
        else:
            raise NotImplementedError('next N')

class FailingMappingKey(object):
    def __getitem__(self, item):
        raise NotImplementedError('getitem:mappingkey')

    def keys(self):
        return list("abcH")

class FailingMapping(object):
    def __getitem__(self):
        raise NotImplementedError('getitem:mapping')

    def keys(self):
        raise NotImplementedError('keys')

class FailingList(list):
    def __getitem__(self, idx):
        if i == 2:
            raise NotImplementedError('getitem:list')
        else:
            return super(FailingList, self).__getitem__(idx)

class NoArgsCall(object):
    def __call__(self):
        pass

class FailingCall(object):
    def __call__(self, path):
        raise NotImplementedError('call')

class FailingNumber(object):
    def __int__(self):
        raise NotImplementedError('int')

cb.append("> Output")
cb.append(">> OutputSetattr")
ee('del sys.stdout.softspace')
number_test('sys.stdout.softspace = %s', unsigned=True)
number_test('sys.stderr.softspace = %s', unsigned=True)
ee('assert sys.stdout.isatty()==False')
ee('assert sys.stdout.seekable()==False')
ee('sys.stdout.close()')
ee('sys.stdout.flush()')
ee('assert sys.stderr.isatty()==False')
ee('assert sys.stderr.seekable()==False')
ee('sys.stderr.close()')
ee('sys.stderr.flush()')
ee('sys.stdout.attr = None')
cb.append(">> OutputWrite")
ee('assert sys.stdout.writable()==True')
ee('assert sys.stdout.readable()==False')
ee('assert sys.stderr.writable()==True')
ee('assert sys.stderr.readable()==False')
ee('sys.stdout.write(None)')
cb.append(">> OutputWriteLines")
ee('sys.stdout.writelines(None)')
ee('sys.stdout.writelines([1])')
iter_test('sys.stdout.writelines(%s)')
cb.append("> VimCommand")
stringtochars_test('vim.command(%s)')
ee('vim.command("", 2)')
#! Not checked: vim->python exceptions translating: checked later
cb.append("> VimToPython")
#! Not checked: everything: needs errors in internal python functions
cb.append("> VimEval")
stringtochars_test('vim.eval(%s)')
ee('vim.eval("", FailingTrue())')
#! Not checked: everything: needs errors in internal python functions
cb.append("> VimEvalPy")
stringtochars_test('vim.bindeval(%s)')
ee('vim.eval("", 2)')
#! Not checked: vim->python exceptions translating: checked later
cb.append("> VimStrwidth")
stringtochars_test('vim.strwidth(%s)')
cb.append("> VimForeachRTP")
ee('vim.foreach_rtp(None)')
ee('vim.foreach_rtp(NoArgsCall())')
ee('vim.foreach_rtp(FailingCall())')
ee('vim.foreach_rtp(int, 2)')
cb.append('> import')
old_rtp = vim.options['rtp']
vim.options['rtp'] = os.getcwd().replace(',', '\\,').replace('\\', '\\\\')
ee('import xxx_no_such_module_xxx')
ee('import failing_import')
ee('import failing')
vim.options['rtp'] = old_rtp
del old_rtp
cb.append("> Options")
cb.append(">> OptionsItem")
ee('vim.options["abcQ"]')
ee('vim.options[""]')
stringtochars_test('vim.options[%s]')
cb.append(">> OptionsContains")
stringtochars_test('%s in vim.options')
cb.append("> Dictionary")
cb.append(">> DictionaryConstructor")
ee('vim.Dictionary("abcI")')
##! Not checked: py_dict_alloc failure
cb.append(">> DictionarySetattr")
ee('del d.locked')
ee('d.locked = FailingTrue()')
ee('vim.vvars.locked = False')
ee('d.scope = True')
ee('d.xxx = True')
cb.append(">> _DictionaryItem")
ee('d.get("a", 2, 3)')
stringtochars_test('d.get(%s)')
ee('d.pop("a")')
ee('dl.pop("a")')
cb.append(">> DictionaryContains")
ee('"" in d')
ee('0 in d')
cb.append(">> DictionaryIterNext")
ee('for i in ned: ned["a"] = 1')
del i
cb.append(">> DictionaryAssItem")
ee('dl["b"] = 1')
stringtochars_test('d[%s] = 1')
convertfrompyobject_test('d["a"] = %s')
cb.append(">> DictionaryUpdate")
cb.append(">>> kwargs")
cb.append(">>> iter")
ee('d.update(FailingMapping())')
ee('d.update([FailingIterNext()])')
ee('d.update([FailingIterNextN(1)])')
iter_test('d.update(%s)')
convertfrompyobject_test('d.update(%s)')
stringtochars_test('d.update(((%s, 0),))')
convertfrompyobject_test('d.update((("a", %s),))')
cb.append(">> DictionaryPopItem")
ee('d.popitem(1, 2)')
cb.append(">> DictionaryHasKey")
ee('d.has_key()')
cb.append("> List")
cb.append(">> ListConstructor")
ee('vim.List(1, 2)')
ee('vim.List(a=1)')
iter_test('vim.List(%s)')
convertfrompyobject_test('vim.List([%s])')
cb.append(">> ListItem")
ee('l[1000]')
cb.append(">> ListAssItem")
ee('ll[1] = 2')
ee('l[1000] = 3')
cb.append(">> ListAssSlice")
ee('ll[1:100] = "abcJ"')
iter_test('l[:] = %s')
ee('nel[1:10:2]  = "abcK"')
cb.append(repr(tuple(nel)))
ee('nel[1:10:2]  = "a"')
cb.append(repr(tuple(nel)))
ee('nel[1:1:-1]  = "a"')
cb.append(repr(tuple(nel)))
ee('nel[:] = FailingIterNextN(2)')
cb.append(repr(tuple(nel)))
convertfrompyobject_test('l[:] = [%s]')
cb.append(">> ListConcatInPlace")
iter_test('l.extend(%s)')
convertfrompyobject_test('l.extend([%s])')
cb.append(">> ListSetattr")
ee('del l.locked')
ee('l.locked = FailingTrue()')
ee('l.xxx = True')
cb.append("> Function")
cb.append(">> FunctionConstructor")
ee('vim.Function("123")')
ee('vim.Function("xxx_non_existent_function_xxx")')
ee('vim.Function("xxx#non#existent#function#xxx")')
cb.append(">> FunctionCall")
convertfrompyobject_test('f(%s)')
convertfrompymapping_test('fd(self=%s)')
cb.append("> TabPage")
cb.append(">> TabPageAttr")
ee('vim.current.tabpage.xxx')
cb.append("> TabList")
cb.append(">> TabListItem")
ee('vim.tabpages[1000]')
cb.append("> Window")
cb.append(">> WindowAttr")
ee('vim.current.window.xxx')
cb.append(">> WindowSetattr")
ee('vim.current.window.buffer = 0')
ee('vim.current.window.cursor = (100000000, 100000000)')
ee('vim.current.window.cursor = True')
number_test('vim.current.window.height = %s', unsigned=True)
number_test('vim.current.window.width = %s', unsigned=True)
ee('vim.current.window.xxxxxx = True')
cb.append("> WinList")
cb.append(">> WinListItem")
ee('vim.windows[1000]')
cb.append("> Buffer")
cb.append(">> StringToLine (indirect)")
ee('vim.current.buffer[0] = "\\na"')
ee('vim.current.buffer[0] = b"\\na"')
cb.append(">> SetBufferLine (indirect)")
ee('vim.current.buffer[0] = True')
cb.append(">> SetBufferLineList (indirect)")
ee('vim.current.buffer[:] = True')
ee('vim.current.buffer[:] = ["\\na", "bc"]')
cb.append(">> InsertBufferLines (indirect)")
ee('vim.current.buffer.append(None)')
ee('vim.current.buffer.append(["\\na", "bc"])')
ee('vim.current.buffer.append("\\nbc")')
cb.append(">> RBItem")
ee('vim.current.buffer[100000000]')
cb.append(">> RBAsItem")
ee('vim.current.buffer[100000000] = ""')
cb.append(">> BufferAttr")
ee('vim.current.buffer.xxx')
cb.append(">> BufferSetattr")
ee('vim.current.buffer.name = True')
ee('vim.current.buffer.xxx = True')
cb.append(">> BufferMark")
ee('vim.current.buffer.mark(0)')
ee('vim.current.buffer.mark("abcM")')
ee('vim.current.buffer.mark("!")')
cb.append(">> BufferRange")
ee('vim.current.buffer.range(1, 2, 3)')
cb.append("> BufMap")
cb.append(">> BufMapItem")
ee('vim.buffers[100000000]')
number_test('vim.buffers[%s]', natural=True)
cb.append("> Current")
cb.append(">> CurrentGetattr")
ee('vim.current.xxx')
cb.append(">> CurrentSetattr")
ee('vim.current.line = True')
ee('vim.current.buffer = True')
ee('vim.current.window = True')
ee('vim.current.tabpage = True')
ee('vim.current.xxx = True')
del d
del ned
del dl
del l
del ll
del nel
del f
del fd
del fdel
del subexpr_test
del stringtochars_test
del Mapping
del convertfrompyobject_test
del convertfrompymapping_test
del iter_test
del number_test
del FailingTrue
del FailingIter
del FailingIterNext
del FailingIterNextN
del FailingMapping
del FailingMappingKey
del FailingList
del NoArgsCall
del FailingCall
del FailingNumber
EOF
:delfunction F
:"
:" Test import
py3 << EOF
sys.path.insert(0, os.path.join(os.getcwd(), 'python_before'))
sys.path.append(os.path.join(os.getcwd(), 'python_after'))
vim.options['rtp'] = os.getcwd().replace(',', '\\,').replace('\\', '\\\\')
l = []
def callback(path):
    l.append(os.path.relpath(path))
vim.foreach_rtp(callback)
cb.append(repr(l))
del l
def callback(path):
    return os.path.relpath(path)
cb.append(repr(vim.foreach_rtp(callback)))
del callback
from module import dir as d
from modulex import ddir
cb.append(d + ',' + ddir)
import before
cb.append(before.dir)
import after
cb.append(after.dir)
import topmodule as tm
import topmodule.submodule as tms
import topmodule.submodule.subsubmodule.subsubsubmodule as tmsss
cb.append(tm.__file__.replace(os.path.sep, '/')[-len('modulex/topmodule/__init__.py'):])
cb.append(tms.__file__.replace(os.path.sep, '/')[-len('modulex/topmodule/submodule/__init__.py'):])
cb.append(tmsss.__file__.replace(os.path.sep, '/')[-len('modulex/topmodule/submodule/subsubmodule/subsubsubmodule.py'):])
del before
del after
del d
del ddir
del tm
del tms
del tmsss
EOF
:"
:" Test exceptions
:fun Exe(e)
:   execute a:e
:endfun
py3 << EOF
Exe = vim.bindeval('function("Exe")')
ee('vim.command("throw \'abcN\'")')
ee('Exe("throw \'def\'")')
ee('vim.eval("Exe(\'throw \'\'ghi\'\'\')")')
ee('vim.eval("Exe(\'echoerr \'\'jkl\'\'\')")')
ee('vim.eval("Exe(\'xxx_non_existent_command_xxx\')")')
ee('vim.eval("xxx_unknown_function_xxx()")')
ee('vim.bindeval("Exe(\'xxx_non_existent_command_xxx\')")')
del Exe
EOF
:delfunction Exe
:"
:" Regression: interrupting vim.command propagates to next vim.command
py3 << EOF
def test_keyboard_interrupt():
    try:
        vim.command('while 1 | endwhile')
    except KeyboardInterrupt:
        cb.append('Caught KeyboardInterrupt')
    except Exception as e:
        cb.append('!!!!!!!! Caught exception: ' + repr(e))
    else:
        cb.append('!!!!!!!! No exception')
    try:
        vim.command('$ put =\'Running :put\'')
    except KeyboardInterrupt:
        cb.append('!!!!!!!! Caught KeyboardInterrupt')
    except Exception as e:
        cb.append('!!!!!!!! Caught exception: ' + repr(e))
    else:
        cb.append('No exception')
EOF
:debuggreedy
:call inputsave()
:call feedkeys("s\ns\ns\ns\nq\n")
:redir => output
:debug silent! py3 test_keyboard_interrupt()
:redir END
:0 debuggreedy
:call inputrestore()
:silent $put =output
:unlet output
:py3 del test_keyboard_interrupt
:"
:" Cleanup
py3 << EOF
del cb
del ee
del sys
del os
del vim
EOF
:endfun
:"
:fun RunTest()
:let checkrefs = !empty($PYTHONDUMPREFS)
:let start = getline(1, '$')
:for i in range(checkrefs ? 10 : 1)
:   if i != 0
:       %d _
:       call setline(1, start)
:   endif
:   call Test()
:   if i == 0
:       let result = getline(1, '$')
:   endif
:endfor
:if checkrefs
:   %d _
:   call setline(1, result)
:endif
:endfun
:"
:call RunTest()
:delfunction RunTest
:delfunction Test
:call garbagecollect(1)
:"
:/^start:/,$wq! test.out
:" vim: et ts=4 isk-=\:
:call getchar()
ENDTEST

start: