Improve font-lock test failure messages with a :to-have-face matcher#146
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The face helpers asserted with a bare (expect ACTUAL :to-equal EXPECTED), so a failure read "Expected face-a to equal face-b" with no hint of which token was wrong. Add a :to-have-face matcher that resolves a substring (searched from point), a position, or a (START END) range and reports e.g. "Expected \"def\" to have face font-lock-string-face, but it had font-lock-keyword-face". Route expect-face-at and clojure-ts--check-faces (hence when-fontifying-it) through it, so the whole font-lock suite gains the better messages.
Replace (cl-letf ((symbol-function ...))) with buttercup's spy-on, which auto-restores after each spec. The clojure-ts-project-relative-path check was a bare expect directly under describe (so it never ran as a spec); wrap it in an it, which both fixes that and lets it use spy-on.
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The font-lock helpers assert faces with a bare
(expect actual :to-equal expected)insideclojure-ts--check-faces/expect-face-at, so a failure just says "Expectedfont-lock-string-faceto equalfont-lock-keyword-face" - with no hint of which token was wrong.This adds a
:to-have-facematcher that takes a substring (searched from point, as the helpers already did), a position, or a(START END)range, and reports things like:expect-face-atandclojure-ts--check-faces(sowhen-fontifying-it) route through it, so the whole font-lock suite gets the better messages with no call-site changes.Second commit swaps the three
cl-letfproject stubs forspy-on(auto-restores per spec). One of them was a bareexpectdirectly underdescribe, so it never actually ran as a spec - it's now wrapped in anit.Test-only; 252 specs, unchanged behavior.