chore(types): basic test runner for type validation

relates to ReactiveX#661

Author: kwonoj

types/index.js

@@ -0,0 +1,37 @@
+var _ = require('lodash');
+var colors = require('colors');
+var glob = require('glob');
+var fs = require('fs');
+var ts = require('typescript');
+
+function diagnose(fileNames, options) {
+  var program = ts.createProgram(fileNames, options);
+
+  var diagnostics = _.groupBy(ts.getPreEmitDiagnostics(program),
+    function (x) {
+      return x.file.fileName;
+    });
+
+  _.forIn(diagnostics, function (value, key) {
+    fs.readFile(key, 'utf-8' ,function (err, file) {
+      var lines = file.split('\n');
+      _.forEach(value, function (diagnostic) {
+        var pos = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
+        var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
+
+        var prefix = ' (' + key + ': ' + pos.line + ',' + pos.character + ') ';
+        console.error('Error : '.red + message + prefix);
+        console.error(lines[pos.line].gray);
+        console.error(_.repeat(' ', pos.character) + '^');
+        console.error();
+      });
+    });
+  });
+}
+
+glob('types/**/*.ts', function (err, files) {
+  files.unshift('typings/es6-shim/es6-shim.d.ts');
+  diagnose(files, {
+    module: ts.ModuleKind.CommonJS
+  });
+});