Cover the Rust LSP with tests, allow LSP linters to be named anything, and rename the Rust LSP linter to rls

ale_linters/rust/langserver.vim

@@ -1,33 +0,0 @@
-" Author: w0rp <devw0rp@gmail.com>
-" Description: A language server for Rust
-
-call ale#Set('rust_langserver_executable', 'rls')
-
-function! ale_linters#rust#langserver#GetExecutable(buffer) abort
-    return ale#Var(a:buffer, 'rust_langserver_executable')
-endfunction
-
-function! ale_linters#rust#langserver#GetCommand(buffer) abort
-    let l:executable = ale_linters#rust#langserver#GetExecutable(a:buffer)
-
-    return ale#Escape(l:executable) . ' +nightly'
-endfunction
-
-function! ale_linters#rust#langserver#GetLanguage(buffer) abort
-    return 'rust'
-endfunction
-
-function! ale_linters#rust#langserver#GetProjectRoot(buffer) abort
-    let l:cargo_file = ale#path#FindNearestFile(a:buffer, 'Cargo.toml')
-
-    return !empty(l:cargo_file) ? fnamemodify(l:cargo_file, ':h') : ''
-endfunction
-
-call ale#linter#Define('rust', {
-\   'name': 'langserver',
-\   'lsp': 'stdio',
-\   'executable_callback': 'ale_linters#rust#langserver#GetExecutable',
-\   'command_callback': 'ale_linters#rust#langserver#GetCommand',
-\   'language_callback': 'ale_linters#rust#langserver#GetLanguage',
-\   'project_root_callback': 'ale_linters#rust#langserver#GetProjectRoot',
-\})

ale_linters/rust/rls.vim

@@ -0,0 +1,33 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: A language server for Rust
+
+call ale#Set('rust_rls_executable', 'rls')
+
+function! ale_linters#rust#rls#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'rust_rls_executable')
+endfunction
+
+function! ale_linters#rust#rls#GetCommand(buffer) abort
+    let l:executable = ale_linters#rust#rls#GetExecutable(a:buffer)
+
+    return ale#Escape(l:executable) . ' +nightly'
+endfunction
+
+function! ale_linters#rust#rls#GetLanguage(buffer) abort
+    return 'rust'
+endfunction
+
+function! ale_linters#rust#rls#GetProjectRoot(buffer) abort
+    let l:cargo_file = ale#path#FindNearestFile(a:buffer, 'Cargo.toml')
+
+    return !empty(l:cargo_file) ? fnamemodify(l:cargo_file, ':h') : ''
+endfunction
+
+call ale#linter#Define('rust', {
+\   'name': 'rls',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#rust#rls#GetExecutable',
+\   'command_callback': 'ale_linters#rust#rls#GetCommand',
+\   'language_callback': 'ale_linters#rust#rls#GetLanguage',
+\   'project_root_callback': 'ale_linters#rust#rls#GetProjectRoot',
+\})