build: sync some utility just instructions I had locally

Author: NlightNFotis

Diff for: justfile

@@ -3,7 +3,7 @@ all: lint sync
 
 # Lint source typescript
 lint:
-    npm run lint -- --fix
+    npm run lint-fix
 
 # Sync generated files (javascript and PR checks)
 sync: build update-pr-checks
@@ -15,3 +15,19 @@ update-pr-checks:
 # Transpile typescript code into javascript
 build:
     npm run build
+
+# Build then run all the tests
+test: build
+    npm run test
+
+# Run the tests for a single file
+test_file filename: build
+    npx ava --verbose {{filename}}
+
+# FOTIS: This shouldn't really be needed, as it's covered by `sync`,
+# however, I recall having messed my environment such that this was the
+# only solution, so keeping it here for convenience & docs.
+[doc("Refresh the lib directory (the .js build artefacts)")]
+[confirm]
+refresh-lib:
+    rm -rf lib && npm run build