Add unit tests for PairApp

Author: igorw

tests/React/Chatroulette/CallableStub.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace React\Chatroulette;
+
+class CallableStub
+{
+    public function __invoke()
+    {
+    }
+}

tests/React/Chatroulette/PairAppTest.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace React\Chatroulette;
+
+use React\Socket\ConnectionInterface;
+
+class PairAppTest extends \PHPUnit_Framework_TestCase
+{
+    private $app;
+
+    public function setUp()
+    {
+        $this->app = new PairApp();
+    }
+
+    /** @test */
+    public function connectingOneUserShouldMakeHimWait()
+    {
+        $alice = new ConnectionStub();
+        $alice->id = 'Alice';
+        $alice->on('wait', $this->expectCallableOnce());
+
+        $this->app->connect($alice);
+    }
+
+    /** @test */
+    public function connectingTwoUsersShouldPairThemUp()
+    {
+        $alice = new ConnectionStub();
+        $alice->id = 'Alice';
+        $alice->on('pipe', $this->expectCallableOnce());
+
+        $bob = new ConnectionStub();
+        $bob->id = 'Bob';
+        $bob->on('pipe', $this->expectCallableOnce());
+
+        $this->app->connect($alice);
+        $this->app->connect($bob);
+    }
+
+    /** @test */
+    public function connectingThreeUsersShouldMakeTheThirdOneWait()
+    {
+        $alice = new ConnectionStub();
+        $alice->id = 'Alice';
+
+        $bob = new ConnectionStub();
+        $bob->id = 'Bob';
+
+        $carol = new ConnectionStub();
+        $carol->id = 'Carol';
+        $carol->on('wait', $this->expectCallableOnce());
+
+        $this->app->connect($alice);
+        $this->app->connect($bob);
+        $this->app->connect($carol);
+    }
+
+    /** @test */
+    public function connectingFourUsersShouldPairThemUpInPairs()
+    {
+        $alice = new ConnectionStub();
+        $alice->id = 'Alice';
+
+        $bob = new ConnectionStub();
+        $bob->id = 'Bob';
+
+        $carol = new ConnectionStub();
+        $carol->id = 'Carol';
+        $carol->on('pipe', $this->expectCallableOnce());
+
+        $dan = new ConnectionStub();
+        $dan->id = 'Dan';
+        $dan->on('pipe', $this->expectCallableOnce());
+
+        $this->app->connect($alice);
+        $this->app->connect($bob);
+        $this->app->connect($carol);
+        $this->app->connect($dan);
+    }
+
+    protected function expectCallableOnce()
+    {
+        $mock = $this->createCallableMock();
+        $mock
+            ->expects($this->once())
+            ->method('__invoke');
+
+        return $mock;
+    }
+
+    protected function createCallableMock()
+    {
+        return $this->getMock('React\Chatroulette\CallableStub');
+    }
+}