#517 Support linter settings needed for LSP, undocumented for now

test/test_linter_defintion_processing.vader

@@ -365,3 +365,74 @@ Execute(PreProcess should accept `aliases` lists):
   let g:linter.aliases = ['foo', 'bar']
 
   AssertEqual ['foo', 'bar'], ale#linter#PreProcess(g:linter).aliases
+
+Execute(PreProcess should accept tsserver LSP configuration):
+  let g:linter = {
+  \ 'name': 'x',
+  \ 'executable': 'x',
+  \ 'lsp': 'tsserver',
+  \ 'callback': 'x',
+  \}
+
+  AssertEqual 'tsserver', ale#linter#PreProcess(g:linter).lsp
+
+  call remove(g:linter, 'executable')
+  let g:linter.executable_callback = 'X'
+
+  call ale#linter#PreProcess(g:linter).lsp
+
+Execute(PreProcess should complain about commands being set for LSP configurations):
+  let g:linter = {
+  \ 'name': 'x',
+  \ 'executable': 'x',
+  \ 'lsp': 'tsserver',
+  \ 'command': 'x',
+  \ 'callback': 'x',
+  \}
+
+  AssertThrows call ale#linter#PreProcess(g:linter)
+  AssertEqual '`command` and `command_callback` and `command_chain` cannot be used when `lsp` is set', g:vader_exception
+
+  call remove(g:linter, 'command')
+  let g:linter.command_callback = 'X'
+
+  AssertThrows call ale#linter#PreProcess(g:linter)
+  AssertEqual '`command` and `command_callback` and `command_chain` cannot be used when `lsp` is set', g:vader_exception
+
+  call remove(g:linter, 'command_callback')
+  let g:linter.command_chain = []
+
+  AssertThrows call ale#linter#PreProcess(g:linter)
+  AssertEqual '`command` and `command_callback` and `command_chain` cannot be used when `lsp` is set', g:vader_exception
+
+Execute(PreProcess should accept LSP server configurations):
+  let g:linter = {
+  \ 'name': 'x',
+  \ 'lsp': 'lsp',
+  \ 'callback': 'x',
+  \ 'address_callback': 'X',
+  \}
+
+  AssertEqual 'lsp', ale#linter#PreProcess(g:linter).lsp
+
+Execute(PreProcess should require an address_callback for LSP server configurations):
+  let g:linter = {
+  \ 'name': 'x',
+  \ 'lsp': 'lsp',
+  \ 'callback': 'x',
+  \}
+
+  AssertThrows call ale#linter#PreProcess(g:linter)
+  AssertEqual '`address_callback` must be defined for getting the LSP address', g:vader_exception
+
+Execute(PreProcess should complain about address_callback for non-LSP linters):
+  let g:linter = {
+  \ 'name': 'x',
+  \ 'callback': 'SomeFunction',
+  \ 'executable': 'echo',
+  \ 'command': 'echo',
+  \ 'address_callback': 'X',
+  \}
+
+  AssertThrows call ale#linter#PreProcess(g:linter)
+  AssertEqual '`address_callback` cannot be used when lsp != ''lsp''', g:vader_exception

test/test_linter_retrieval.vader

@@ -1,8 +1,8 @@
 Before:
   Save g:ale_linters, g:ale_linter_aliases
 
-  let g:testlinter1 = {'name': 'testlinter1', 'executable': 'testlinter1', 'command': 'testlinter1', 'callback': 'testCB1', 'output_stream': 'stdout', 'read_buffer': 1, 'lint_file': 0, 'aliases': []}
-  let g:testlinter2 = {'name': 'testlinter2', 'executable': 'testlinter2', 'command': 'testlinter2', 'callback': 'testCB2', 'output_stream': 'stdout', 'read_buffer': 0, 'lint_file': 1, 'aliases': []}
+  let g:testlinter1 = {'name': 'testlinter1', 'executable': 'testlinter1', 'command': 'testlinter1', 'callback': 'testCB1', 'output_stream': 'stdout', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': ''}
+  let g:testlinter2 = {'name': 'testlinter2', 'executable': 'testlinter2', 'command': 'testlinter2', 'callback': 'testCB2', 'output_stream': 'stdout', 'read_buffer': 0, 'lint_file': 1, 'aliases': [], 'lsp': ''}
   call ale#linter#Reset()
 
 After:
@@ -105,4 +105,4 @@ Execute (The local alias option shouldn't completely replace the global one):
   AssertEqual [g:testlinter1, g:testlinter2], ale#linter#Get('testft1')
 
 Execute (Linters should be loaded from disk appropriately):
-  AssertEqual [{'name': 'testlinter', 'output_stream': 'stdout', 'executable': 'testlinter', 'command': 'testlinter', 'callback': 'testCB', 'read_buffer': 1, 'lint_file': 0, 'aliases': []}], ale#linter#Get('testft')
+  AssertEqual [{'name': 'testlinter', 'output_stream': 'stdout', 'executable': 'testlinter', 'command': 'testlinter', 'callback': 'testCB', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': ''}], ale#linter#Get('testft')