181 lines
6.3 KiB
Fennel
181 lines
6.3 KiB
Fennel
(local faith (require :faith))
|
|
(local {: view} (require :fennel))
|
|
(local {: create-client-with-files} (require :test.utils))
|
|
|
|
(fn find [diagnostics e]
|
|
"returns the index of the diagnostic "
|
|
(accumulate [result nil
|
|
i d (ipairs diagnostics)
|
|
&until result]
|
|
(if (and (or (= e.message nil)
|
|
(if (= (type e.message) "function")
|
|
(e.message d.message)
|
|
(= e.message d.message)))
|
|
(or (= e.code nil)
|
|
(= e.code d.code))
|
|
(or (= e.range nil)
|
|
(and (= e.range.start.line d.range.start.line)
|
|
(= e.range.start.character d.range.start.character)
|
|
(= e.range.end.line d.range.end.line)
|
|
(= e.range.end.character d.range.end.character))))
|
|
i)))
|
|
|
|
(fn check [file-contents expected unexpected]
|
|
(let [{: diagnostics} (create-client-with-files file-contents)]
|
|
(each [_ e (ipairs unexpected)]
|
|
(let [i (find diagnostics e)]
|
|
(faith.= nil i (.. "Lint matching " (view e) "\n"
|
|
"from: " (view file-contents) "\n"
|
|
(view (. diagnostics i) {:escape-newlines? true})))))
|
|
|
|
(each [_ e (ipairs expected)]
|
|
(let [i (find diagnostics e)]
|
|
(faith.is i (.. "No lint matching " (view e) "\n"
|
|
"from: " (view file-contents) "\n"
|
|
(view diagnostics {:empty-as-sequence? true
|
|
:escape-newlines? true})))
|
|
(table.remove diagnostics i)))))
|
|
|
|
(fn test-unused []
|
|
(check "(local x 10)"
|
|
[{:message "unused definition: x"
|
|
:code 301
|
|
:range {:start {:character 7 :line 0}
|
|
:end {:character 8 :line 0}}}] [])
|
|
(check "(fn x [])"
|
|
[{:message "unused definition: x"
|
|
:code 301
|
|
:range {:start {:character 4 :line 0}
|
|
:end {:character 5 :line 0}}}] [])
|
|
(check "(let [(x y) (values 1 2)] x)"
|
|
[{:code 301
|
|
:range {:start {:character 9 :line 0}
|
|
:end {:character 10 :line 0}}}] [])
|
|
;; setting a var without reading
|
|
(check "(var x 1) (set x 2) (set [x] [3])"
|
|
[{:code 301
|
|
:range {:start {:character 5 :line 0}
|
|
:end {:character 6 :line 0}}}] [])
|
|
;; setting a field without reading is okay
|
|
(check "(fn [a b] (set a.x 10) (fn b.f []))" [] [{}])
|
|
(check "(case {:b 1} (where (or {:a x} {:b x})) x)" [] [{}])
|
|
nil)
|
|
|
|
(fn test-ampersand []
|
|
(check "(let [[x & y] [1 2 3]]
|
|
(print x (. y 1) (. y 2)))"
|
|
[] [{:message "unused definition: &"} {}])
|
|
(check "(let [{1 x & y} [1 2 3]]
|
|
(print x (. y 2) (. y 3)))"
|
|
[] [{:message "unused definition: &"} {}])
|
|
(check "(let [[x &as y] [1 2 3]]
|
|
(print x (. y 2) (. y 3)))"
|
|
[] [{:message "unused definition: &as"} {}])
|
|
(check "(let [{1 x &as y} [1 2 3]]
|
|
(print x (. y 2) (. y 3)))"
|
|
[] [{:message "unused definition: &as"} {}])
|
|
(check "(fn [x & more]
|
|
(print x more))"
|
|
[] [{:message "unused definition: &"} {}])
|
|
nil)
|
|
|
|
(fn test-unknown-module-field []
|
|
(check {:the-guy-they-tell-you-not-to-worry-about.fnl
|
|
"(local M {:a 1})
|
|
(fn M.b [] 2)
|
|
M"
|
|
:main.fnl
|
|
"(local {: a : c &as guy} (require :the-guy-they-tell-you-not-to-worry-about))
|
|
(print guy.b guy.d)"}
|
|
[{:code 302}] [{:code 302 :message "unknown module field: a"}
|
|
{:code 302 :message "unknown module field: b"}])
|
|
(check "table.insert2"
|
|
[{:code 302}]
|
|
[]))
|
|
|
|
(fn test-unnecessary-colon []
|
|
(check "(let [x :haha] (: x :find :a))"
|
|
[{:message "unnecessary : call: use (x:find)"
|
|
:code 303
|
|
:range {:start {:character 15 :line 0}
|
|
:end {:character 29 :line 0}}}] [])
|
|
|
|
;; no warning from macros
|
|
(check "(let [x :haha y :find] (-> x (: y :a))
|
|
(let [x :haha] (-> x (: :find :a))"
|
|
[] [{:code 303}])
|
|
|
|
;; no warning when its an expression, or when string has spaces
|
|
(check "(let [x :haha]
|
|
(: x \"bar baz\") (: x 1) (: x x))"
|
|
[] [{:code 303}])
|
|
nil)
|
|
|
|
(fn test-unpack-into-op []
|
|
(check "(+ (unpack [1 2 3]))"
|
|
[{:code 304}] [])
|
|
|
|
(check "(.. (table.unpack [\"hello\" \"world\"]))"
|
|
[{:code 304 :message #($:find "table.concat")}] [])
|
|
|
|
(check "(* (table.unpack [\"hello\" \"world\"]))"
|
|
[{:code 304 :message #(not ($:find "table%.concat"))}]
|
|
[{:code 304 :message #($:find "table.concat")}])
|
|
|
|
;; only when lexical
|
|
(check "(-> [1 2 3] unpack +)"
|
|
[] [{:code 304}])
|
|
nil)
|
|
|
|
(fn test-unset-var []
|
|
(check "(var x nil) (print x)"
|
|
[{:code 305
|
|
:range {:start {:character 5 :line 0}
|
|
:end {:character 6 :line 0}}}] [])
|
|
|
|
(check "(var x 1) (set x 2) (print x)"
|
|
[] [{}])
|
|
(check "(local x 10) (?. x)"
|
|
[] [{:code 305}])
|
|
nil)
|
|
|
|
;; missing test for 306
|
|
|
|
(fn test-unpack-in-middle []
|
|
(check "(+ 1 2 3 (values 4 5) 6)"
|
|
[{:code 307
|
|
:range {:start {:line 0 :character 9}
|
|
:end {:line 0 :character 21}}}]
|
|
[])
|
|
|
|
;; not in a statement, should be covered by another lint
|
|
(check "(let [x 10] (values 4 5) x)"
|
|
[] [{:code 307}])
|
|
(check "(do (values 4 5) (_G.unpack 6 7) (table.unpack 8 9) 10)"
|
|
[] [{:code 307}])
|
|
nil)
|
|
|
|
;; TODO lints:
|
|
;; unnecessary (do) in body position
|
|
;; duplicate keys in kv table
|
|
;; (tset <sym> <str>) --> (set <sym>.<str>)
|
|
;; (tset <sym> <any>) --> (set (. <sym> <any>))
|
|
;; {&as x} and [&as x] pattern with no other matches
|
|
;; Unused variables / fields (maybe difficult)
|
|
;; discarding results to various calls, such as unpack, values, etc
|
|
;; unnecessary `do`/`values` with only one inner form
|
|
;; `pairs` or `ipairs` call in a (for) binding table
|
|
;; mark when unification is happening on a `match` pattern (may be difficult)
|
|
;; steal as many lints as possible from cargo
|
|
;; unnecessary parens around single multival destructure
|
|
|
|
;; unused variable, when a function binding is only used in its body, and the function value is discarded
|
|
|
|
{: test-unused
|
|
: test-ampersand
|
|
: test-unknown-module-field
|
|
: test-unnecessary-colon
|
|
: test-unset-var
|
|
: test-unpack-into-op
|
|
: test-unpack-in-middle}
|