Set up javascript tests

web/.babelrc

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+{
+  "presets": [
+    ["env", { "modules": false }],
+    "react"
+  ]
+}

web/Makefile

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+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

web/package.json

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+{
+  "name": "loop-habit-tracker",
+  "version": "2.0.0",
+  "description": "App for creating and maintaining good habits",
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:iSoron/uhabits.git"
+  },
+  "main": "index.js",
+  "scripts": {
+    "compile": "webpack",
+    "test": "mocha"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "GPL-3.0-or-later",
+  "dependencies": {
+    "babel-core": "^6.26.3",
+    "babel-preset-env": "^1.7.0",
+    "babel-preset-react": "^6.24.1",
+    "kotlin": "^1.3.21",
+    "kotlin-test": "^1.3.21"
+  },
+  "devDependencies": {
+    "babel-loader": "^7.1.5",
+    "mocha": "^6.1.0",
+    "webpack": "^4.29.6",
+    "webpack-cli": "^3.3.0"
+  }
+}

web/src/index.js

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+console.log('Hello World!');

web/test/index.js

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+var assert = require('assert');
+var coreTest = require('core_test');