escape dot in maker regex (#357)

* escape dot in maker regex

* Create test_typecheck_handler

* Rename test_typecheck_handler to test_typecheck_handler.vader

ale_linters/typescript/typecheck.vim

@@ -7,7 +7,7 @@ function! ale_linters#typescript#typecheck#Handle(buffer, lines) abort
     " hello.ts[7, 41]: Property 'a' does not exist on type 'A'
     " hello.ts[16, 7]: Type 'A' is not assignable to type 'B'
     "
-    let l:pattern = '.\+.ts\[\(\d\+\), \(\d\+\)\]: \(.\+\)'
+    let l:pattern = '.\+\.ts\[\(\d\+\), \(\d\+\)\]: \(.\+\)'
     let l:output = []
 
     for l:line in a:lines

test/test_typecheck_handler.vader

@@ -0,0 +1,31 @@
+Execute(The typecheck handler should parse lines correctly):
+  runtime ale_linters/typescript/typecheck.vim
+
+  AssertEqual
+  \ [
+  \   {
+  \     'bufnr': 347,
+  \     'lnum': 16,
+  \     'vcol': 0,
+  \     'col': 7,
+  \     'text': "Type 'A' is not assignable to type 'B'",
+  \     'type': 'E',
+  \     'nr': -1,
+  \   },
+  \   {
+  \     'bufnr': 347,
+  \     'lnum': 7,
+  \     'vcol': 0,
+  \     'col': 41,
+  \     'text': "Property 'a' does not exist on type 'A'",
+  \     'type': 'E',
+  \     'nr': -1,
+  \   },
+  \ ],
+  \ ale_linters#typescript#typecheck#Handle(347, [
+  \   "somets.ts[16, 7]: Type 'A' is not assignable to type 'B'",
+  \   "somets.ts[7, 41]: Property 'a' does not exist on type 'A'",
+  \ ])
+
+After:
+  call ale#linter#Reset()