#2172 Auto PATH with ale_python_auto_virtualenv

Automatically set `PATH` for some Python linters that seem to need it
when g:ale_python_auto_virtualenv or b:ale_python_auto_virtualenv is
`1`.

test/linter/test_jedils.vader

@@ -0,0 +1,47 @@
+Before:
+  call ale#assert#SetUpLinterTest('python', 'jedils')
+  Save b:ale_python_auto_virtualenv
+
+  let b:bin_dir = has('win32') ? 'Scripts' : 'bin'
+
+After:
+  unlet! b:bin_dir
+  unlet! b:venv_bin
+  unlet! b:sep
+  unlet! b:executable
+
+  call ale#assert#TearDownLinterTest()
+
+Execute(The jedi-language-server command callback should return default string):
+  call ale#test#SetFilename('./foo.py')
+
+  AssertLinter 'jedi-language-server', ale#Escape('jedi-language-server')
+
+Execute(The jedi-language-server executable should be configurable):
+  let g:ale_python_jedils_executable = '~/.local/bin/jedi-language-server'
+
+  AssertLinter '~/.local/bin/jedi-language-server' , ale#Escape('~/.local/bin/jedi-language-server')
+
+Execute(virtualenv vars should be used when ale_python_auto_virtualenv = 1):
+  let b:ale_python_auto_virtualenv = 1
+  call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py')
+
+  let b:venv_bin = ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir)
+  let b:sep = has('win32') ? ';' : ':'
+  let b:executable = ale#path#Simplify(b:venv_bin . '/jedi-language-server')
+
+  AssertLinter b:executable, ale#Env('PATH', b:venv_bin . b:sep . $PATH)
+  \   . ale#Escape(b:executable)
+
+Execute(You should be able to override the jedi-language-server virtualenv lookup):
+  call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py')
+
+  let g:ale_python_jedils_use_global = 1
+
+  AssertLinter 'jedi-language-server', ale#Escape('jedi-language-server')
+
+Execute(Setting executable to 'pipenv' appends 'run jedi-language-server'):
+  let g:ale_python_jedils_executable = 'path/to/pipenv'
+  call ale#test#SetFilename('../test-files/dummy')
+
+  AssertLinter 'path/to/pipenv', ale#Escape('path/to/pipenv') . ' run jedi-language-server'

test/linter/test_pylsp.vader

@@ -1,10 +1,13 @@
 Before:
   call ale#assert#SetUpLinterTest('python', 'pylsp')
+  Save b:ale_python_auto_virtualenv
 
   let b:bin_dir = has('win32') ? 'Scripts' : 'bin'
 
 After:
   unlet! b:bin_dir
+  unlet! b:venv_bin
+  unlet! b:sep
   unlet! b:executable
 
   call ale#assert#TearDownLinterTest()
@@ -40,6 +43,17 @@ Execute(The pylsp executable should be run from the virtualenv path):
   AssertEqual ale#Escape(b:executable),
   \ ale_linters#python#pylsp#GetCommand(bufnr(''))
 
+Execute(virtualenv vars should be used when ale_python_auto_virtualenv = 1):
+  let b:ale_python_auto_virtualenv = 1
+  call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py')
+
+  let b:venv_bin = ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir)
+  let b:sep = has('win32') ? ';' : ':'
+  let b:executable = ale#path#Simplify(b:venv_bin . '/pylsp')
+
+  AssertLinter b:executable, ale#Env('PATH', b:venv_bin . b:sep . $PATH)
+  \   . ale#Escape(b:executable)
+
 Execute(You should be able to override the pylsp virtualenv lookup):
   call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py')
 

test/linter/test_pyright.vader

@@ -1,10 +1,13 @@
 Before:
   call ale#assert#SetUpLinterTest('python', 'pyright')
+  Save b:ale_python_auto_virtualenv
 
   let b:bin_dir = has('win32') ? 'Scripts' : 'bin'
 
 After:
   unlet! b:bin_dir
+  unlet! b:venv_bin
+  unlet! b:sep
   unlet! b:executable
 
   call ale#assert#TearDownLinterTest()
@@ -132,6 +135,17 @@ Execute(The pyright callbacks should detect virtualenv directories):
 
   AssertLinter b:executable, ale#Escape(b:executable) . ' --stdio'
 
+Execute(virtualenv vars should be used when ale_python_auto_virtualenv = 1):
+  let b:ale_python_auto_virtualenv = 1
+  call ale#test#SetFilename('../test-files/python/with_virtualenv/subdir/foo/bar.py')
+
+  let b:venv_bin = ale#path#Simplify(g:dir . '/../test-files/python/with_virtualenv/env/' . b:bin_dir)
+  let b:sep = has('win32') ? ';' : ':'
+  let b:executable = ale#path#Simplify(b:venv_bin . '/pyright-langserver')
+
+  AssertLinter b:executable, ale#Env('PATH', b:venv_bin . b:sep . $PATH)
+  \   . ale#Escape(b:executable) . ' --stdio'
+
 Execute(Setting executable to 'pipenv' should append 'run pyright'):
   call ale#test#SetFilename('../test-files')