Add ALEGoToImplementation (#4160)

* Add go to implementation

* Add test cases for GoToImplementation

* Add documentation for GoToImplementation

1 files changed, 96 insertions, 0 deletions

diff --git a/test/test_go_to_definition.vader b/test/test_go_to_definition.vader
index fd2519b8..726de551 100644
--- a/test/test_go_to_definition.vader
+++ b/test/test_go_to_definition.vader
@@ -266,6 +266,30 @@ Execute(tsserver type definition requests should be sent):
   \ g:message_list
   AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
 
+Execute(tsserver implementation requests should be sent):
+  runtime ale_linters/typescript/tsserver.vim
+  call setpos('.', [bufnr(''), 2, 5, 0])
+
+  ALEGoToImplementation
+
+  " We shouldn't register the callback yet.
+  AssertEqual '''''', string(g:Callback)
+
+  AssertEqual type(function('type')), type(g:InitCallback)
+  call g:InitCallback()
+
+  AssertEqual 'implementation', g:capability_checked
+  AssertEqual
+  \ 'function(''ale#definition#HandleTSServerResponse'')',
+  \ string(g:Callback)
+  AssertEqual
+  \ [
+  \   ale#lsp#tsserver_message#Change(bufnr('')),
+  \   [0, 'ts@implementation', {'file': expand('%:p'), 'line': 2, 'offset': 5}]
+  \ ],
+  \ g:message_list
+  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
+
 Execute(tsserver tab definition requests should be sent):
   runtime ale_linters/typescript/tsserver.vim
   call setpos('.', [bufnr(''), 2, 5, 0])
@@ -520,6 +544,42 @@ Execute(LSP type definition requests should be sent):
 
   AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
 
+Execute(LSP implementation requests should be sent):
+  runtime ale_linters/python/pylsp.vim
+  let b:ale_linters = ['pylsp']
+  call setpos('.', [bufnr(''), 1, 5, 0])
+
+  ALEGoToImplementation
+
+  " We shouldn't register the callback yet.
+  AssertEqual '''''', string(g:Callback)
+
+  AssertEqual type(function('type')), type(g:InitCallback)
+  call g:InitCallback()
+
+  AssertEqual 'implementation', g:capability_checked
+  AssertEqual
+  \ 'function(''ale#definition#HandleLSPResponse'')',
+  \ string(g:Callback)
+
+  AssertEqual
+  \ [
+  \   [1, 'textDocument/didChange', {
+  \     'textDocument': {
+  \         'uri': ale#path#ToFileURI(expand('%:p')),
+  \         'version': g:ale_lsp_next_version_id - 1,
+  \     },
+  \     'contentChanges': [{'text': join(getline(1, '$'), "\n") . "\n"}]
+  \   }],
+  \   [0, 'textDocument/implementation', {
+  \   'textDocument': {'uri': ale#path#ToFileURI(expand('%:p'))},
+  \   'position': {'line': 0, 'character': 2},
+  \   }],
+  \ ],
+  \ g:message_list
+
+  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
+
 Execute(LSP tab definition requests should be sent):
   runtime ale_linters/python/pylsp.vim
   let b:ale_linters = ['pylsp']
@@ -591,3 +651,39 @@ Execute(LSP tab type definition requests should be sent):
   \ g:message_list
 
   AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()
+
+Execute(LSP tab implementation requests should be sent):
+  runtime ale_linters/python/pylsp.vim
+  let b:ale_linters = ['pylsp']
+  call setpos('.', [bufnr(''), 1, 5, 0])
+
+  ALEGoToImplementation -tab
+
+  " We shouldn't register the callback yet.
+  AssertEqual '''''', string(g:Callback)
+
+  AssertEqual type(function('type')), type(g:InitCallback)
+  call g:InitCallback()
+
+  AssertEqual 'implementation', g:capability_checked
+  AssertEqual
+  \ 'function(''ale#definition#HandleLSPResponse'')',
+  \ string(g:Callback)
+
+  AssertEqual
+  \ [
+  \   [1, 'textDocument/didChange', {
+  \     'textDocument': {
+  \         'uri': ale#path#ToFileURI(expand('%:p')),
+  \         'version': g:ale_lsp_next_version_id - 1,
+  \     },
+  \     'contentChanges': [{'text': join(getline(1, '$'), "\n") . "\n"}]
+  \   }],
+  \   [0, 'textDocument/implementation', {
+  \   'textDocument': {'uri': ale#path#ToFileURI(expand('%:p'))},
+  \   'position': {'line': 0, 'character': 2},
+  \   }],
+  \ ],
+  \ g:message_list
+
+  AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()