Added Tests to mirror .NET port

Author: Lewiscowles1986

tests/BaseTest.php

@@ -0,0 +1,64 @@
+<?php
+
+require_once __DIR__.'/../vendor/autoload.php';
+require_once __DIR__.'/../src/ulid.php';
+
+use lewiscowles\core\Ulid;
+
+use PHPUnit\Framework\TestCase;
+
+class BaseTest extends TestCase
+{
+
+    const TIME = 1469918176385;
+
+    public function setup()
+    {
+        $this->ulid = new Ulid();
+    }
+
+    public function testRandIsBetween1and0()
+    {
+        $rand = $this->invokeMethod($this->ulid, 'getRand');
+        $this->assertTrue( $rand > 0 && $rand < 1 );
+    }
+
+    public function testEncodeTimeShouldReturnExpectedEncodedResult()
+    {
+        $hash = $this->invokeMethod($this->ulid, 'encodeTime', [self::TIME, 10]);
+        $this->assertEquals("01ARYZ6S41", $hash);
+    }
+
+    public function testEncodeTimeShouldChangeLengthProperly()
+    {
+        $hash = $this->invokeMethod($this->ulid, 'encodeTime', [self::TIME, 12]);
+        $this->assertEquals("0001ARYZ6S41", $hash);
+    }
+
+    public function testEncodeTimeShouldTruncateTimeIfNotLongEnough()
+    {
+        $hash = $this->invokeMethod($this->ulid, 'encodeTime', [self::TIME, 8]);
+        $this->assertEquals("ARYZ6S41", $hash);
+    }
+
+    public function testEncodeRandomShouldReturnCorrectLength()
+    {
+        $length = 12;
+        $hash = $this->invokeMethod($this->ulid, 'encodeRandom', [$length]);
+        $this->assertEquals($length, strlen($hash));
+    }
+
+    public function testNewUlidShouldReturnCorrectLength()
+    {
+        $hash = $this->ulid->get();
+        $this->assertEquals(26, strlen($hash));
+    }
+
+    protected function invokeMethod(&$object, $methodName, array $parameters = array())
+    {
+        $reflection = new \ReflectionClass(get_class($object));
+        $method = $reflection->getMethod($methodName);
+        $method->setAccessible(true);
+        return $method->invokeArgs($object, $parameters);
+    }
+}