added unit testing, and started implementing unit tests...phew

node_modules/sinon/lib/sinon.js

@@ -0,0 +1,57 @@
+"use strict";
+
+var behavior = require("./sinon/behavior");
+var createSandbox = require("./sinon/create-sandbox");
+var deprecated = require("./sinon/util/core/deprecated");
+var extend = require("./sinon/util/core/extend");
+var fakeTimers = require("./sinon/util/fake-timers");
+var format = require("./sinon/util/core/format");
+var nise = require("nise");
+var Sandbox = require("./sinon/sandbox");
+var stub = require("./sinon/stub");
+
+var apiMethods = {
+    createSandbox: createSandbox,
+    assert: require("./sinon/assert"),
+    match: require("@sinonjs/samsam").createMatcher,
+    spyCall: require("./sinon/call"),
+
+    expectation: require("./sinon/mock-expectation"),
+    createStubInstance: require("./sinon/stub").createStubInstance,
+    defaultConfig: require("./sinon/util/core/default-config"),
+
+    setFormatter: format.setFormatter,
+
+    // fake timers
+    timers: fakeTimers.timers,
+
+    // fake XHR
+    xhr: nise.fakeXhr.xhr,
+    FakeXMLHttpRequest: nise.fakeXhr.FakeXMLHttpRequest,
+
+    // fake server
+    fakeServer: nise.fakeServer,
+    fakeServerWithClock: nise.fakeServerWithClock,
+    createFakeServer: nise.fakeServer.create.bind(nise.fakeServer),
+    createFakeServerWithClock: nise.fakeServerWithClock.create.bind(nise.fakeServerWithClock),
+
+    addBehavior: function(name, fn) {
+        behavior.addBehavior(stub, name, fn);
+    }
+};
+
+var legacySandboxAPI = {
+    sandbox: {
+        create: deprecated.wrap(
+            createSandbox,
+            // eslint-disable-next-line max-len
+            "`sandbox.create()` is deprecated. Use default sandbox at `sinon.sandbox` or create new sandboxes with `sinon.createSandbox()`"
+        )
+    }
+};
+
+var sandbox = new Sandbox();
+
+var api = extend(sandbox, legacySandboxAPI, apiMethods);
+
+module.exports = api;