Add an ability to run/debug ir tests inside node.js (even from IDEA)

.idea/runConfigurations/run_IR_test_in_node_js.xml

@@ -0,0 +1,13 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="run IR test in node.js" type="js.build_tools.npm">
+    <package-json value="$PROJECT_DIR$/js/js.translator/testData/package.json" />
+    <command value="run" />
+    <scripts>
+      <script value="runIrTestInNode" />
+    </scripts>
+    <arguments value="$FilePath$" />
+    <node-interpreter value="project" />
+    <envs />
+    <method v="2" />
+  </configuration>
+</component>

js/js.translator/testData/package.json

@@ -8,6 +8,7 @@
   },
   "scripts": {
     "runOnTeamcity": "mocha --reporter mocha-teamcity-reporter",
-    "test": "mocha"
+    "test": "mocha",
+    "runIrTestInNode" : "node $NODE_DEBUG_OPTION runIrTestInNode.js"
   }
 }

js/js.translator/testData/runIrTestInNode.js

@@ -0,0 +1,46 @@
+// Note right now it works only for IR tests.
+// With IDEA 2018.3 or later you can just activate required js and run "run IR test in node.js" configuration.
+
+// Add to this array your path to test files or provide it as argument.
+var anotherFiles = [""];
+
+var vm = require('vm');
+var fs = require('fs');
+
+// Change working dir to root of project
+var testDataPathFromRoot = "js/js.translator/testData";
+var cwd = process.cwd();
+if (cwd.endsWith(testDataPathFromRoot)) {
+    process.chdir(cwd.substr(0, cwd.length - testDataPathFromRoot.length));
+}
+
+var runtimeFiles = ["js/js.translator/testData/out/irBox/testRuntime.js"];
+var filesFromArgs = process.argv.slice(2);
+
+// TODO autodetect common js files and other js files
+// Filter out all except existing js files and transform all paths to absolute
+var files = [].concat(runtimeFiles, filesFromArgs, anotherFiles)
+    .map(function(path) {
+        if (fs.existsSync(path) && fs.statSync(path).isFile()) {
+            return fs.realpathSync(path)
+        }
+
+        return "";
+    })
+    .filter(function(path) {
+        return path.endsWith(".js")
+    });
+
+// Evaluate files and run box function
+
+var sandbox = {};
+vm.createContext(sandbox);
+
+files.forEach(function(path) {
+    var code = fs.readFileSync(path, 'utf8');
+    vm.runInContext(code, sandbox, {
+        filename: path
+    })
+});
+
+console.log(vm.runInContext("box()", sandbox));