Set up javascript tests

web/Makefile

@@ -0,0 +1,26 @@
+test_bundle := build/bundles/test.js
+node_modules := node_modules/.bin/mocha
+
+$(node_modules):
+	npm install
+
+core:
+	cd ../core; ./gradlew --quiet jsMainClasses jsTestClasses
+	cp ../core/build/classes/kotlin/js/*/*.js node_modules/
+
+$(test_bundle): test/index.js core
+	mkdir -p build/bundles
+	npx webpack $< --silent --mode production --output $@
+
+test: $(test_bundle) $(node_modules)
+	mkdir -p build/reports
+	npx mocha $@ --reporter xunit > build/reports/tests.xml
+	npx mocha $@
+
+clean:
+	rm -rf build
+
+distclean: clean
+	rm -rf node_modules
+
+.PHONY: test clean distclean core