Add: test for different calculator value equivalencies

tests/integration/UnitConverter/CalculatorResults.spec.php

@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * This file is part of the jordanbrauer/unit-converter PHP package.
+ *
+ * @copyright 2017 Jordan Brauer <[email protected]>
+ * @license MIT
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare (strict_types = 1);
+
+namespace UnitConverter\Tests\Integration;
+
+use PHPUnit\Framework\TestCase;
+use UnitConverter\UnitConverter;
+use UnitConverter\Calculator\SimpleCalculator;
+use UnitConverter\Calculator\BinaryCalculator;
+use UnitConverter\Registry\UnitRegistry;
+use UnitConverter\Unit\Length\Centimetre;
+use UnitConverter\Unit\Length\Inch;
+
+/**
+ * Tests that both the Simlpe and Binary calculator implementations
+ * generate the same results, regardless of typing (int/float, or string).
+ */
+class CalculatorResultsSpec extends TestCase
+{
+    protected function setUp ()
+    {
+        $registry = new UnitRegistry([
+            new Centimetre,
+            new Inch,
+        ]);
+
+        $this->simpleConverter = new UnitConverter(
+            $registry, new SimpleCalculator
+        );
+
+        $this->binaryConverter = new UnitConverter(
+            $registry, new BinaryCalculator
+        );
+    }
+
+    protected function tearDown ()
+    {
+        unset($this->simpleConverter);
+        unset($this->binaryConverter);
+    }
+
+    /**
+     * @test
+     */
+    public function assertSimpleAndBinaryCalculatorsProduceSameResult ()
+    {
+        $value = 1;
+        $expectedSimpleResult = 2.54;
+        $expectedBinaryResult = "2.54";
+        $simpleResult = $this->simpleConverter->convert($value)->from("in")->to("cm");
+        $binaryResult = $this->binaryConverter->convert("{$value}")->from("in")->to("cm");
+
+        $this->assertEquals($simpleResult, $binaryResult);
+        $this->assertSame($expectedSimpleResult, $simpleResult);
+        $this->assertSame($expectedBinaryResult, $binaryResult);
+    }
+}