tests for sinus

Author: Stefan Majoor

tests/Decimal/DecimalSinTest.php

@@ -0,0 +1,29 @@
+<?php
+
+use Litipk\BigNumbers\Decimal as Decimal;
+
+/**
+ * @group sin
+ */
+class DecimalSinTest extends PHPUnit_Framework_TestCase
+{
+    public function sinProvider() {
+        // Some values providede by mathematica
+        return array(
+            array('1', '0.84147098480790', '14'),
+            array('123.123', '-0.56537391969733569', '17'),
+            array('15000000000', '0.69170450164193502844', '20')
+
+        );
+    }
+
+    /**
+     * @dataProvider sinProvider
+     */
+    public function testSimple($nr, $answer, $digits)
+    {
+        $x = Decimal::fromString($nr);
+        $sinX = $x->sin($digits);
+        $this->assertTrue(Decimal::fromString($answer)->equals($sinX));
+    }
+}