Test enhancement

tests/BigIntegerTest.php

@@ -1905,4 +1905,13 @@ public function testDirectCallToUnserialize()
     {
         BigInteger::zero()->unserialize('123');
     }
+
+    public function testJsonSerialize()
+    {
+        $value = '-1234567890987654321012345678909876543210123456789';
+
+        $number = BigInteger::of($value);
+
+        $this->assertSame($value, $number->jsonSerialize());
+    }
 }

tests/Internal/Calculator/NativeCalculatorTest.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace Brick\Math\Tests\Internal\Calculator;
+
+use Brick\Math\Internal\Calculator\NativeCalculator;
+use Brick\Math\Tests\AbstractTestCase;
+
+/**
+ * Unit tests for class NativeCalculator.
+ */
+class NativeCalculatorTest extends AbstractTestCase
+{
+    /**
+     * @dataProvider providerAdd
+     *
+     * @param string $a
+     * @param string $b
+     * @param string $expectedValue
+     */
+    public function testAdd($a, $b, $expectedValue)
+    {
+        $nativeCalculator = new NativeCalculator();
+        $this->assertSame($expectedValue, $nativeCalculator->add($a, $b));
+    }
+
+    /**
+     * @return array
+     */
+    public function providerAdd()
+    {
+        return [
+            ['0', '1234567891234567889999999', '1234567891234567889999999'],
+            ['1234567891234567889999999', '0', '1234567891234567889999999'],
+
+            ['1234567891234567889999999', '-1234567891234567889999999', '0'],
+            ['-1234567891234567889999999', '1234567891234567889999999', '0'],
+
+            ['1234567891234567889999999', '1234567891234567889999999', '2469135782469135779999998'],
+        ];
+    }
+
+    /**
+     * @dataProvider providerMul
+     *
+     * @param string $a
+     * @param string $b
+     * @param string $expectedValue
+     */
+    public function testMul($a, $b, $expectedValue)
+    {
+        $nativeCalculator = new NativeCalculator();
+        $this->assertSame($expectedValue, $nativeCalculator->mul($a, $b));
+    }
+
+    /**
+     * @return array
+     */
+    public function providerMul()
+    {
+        return [
+            ['0', '0', '0'],
+
+            ['1', '1234567891234567889999999', '1234567891234567889999999'],
+            ['1234567891234567889999999', '1', '1234567891234567889999999'],
+
+            ['1234567891234567889999999', '-1234567891234567889999999', '-1524157878067367851562259605883269630864220000001'],
+            ['-1234567891234567889999999', '1234567891234567889999999', '-1524157878067367851562259605883269630864220000001'],
+
+            ['1234567891234567889999999', '1234567891234567889999999', '1524157878067367851562259605883269630864220000001'],
+        ];
+    }
+
+    /**
+     * @dataProvider providerPow
+     *
+     * @param string $a
+     * @param string $b
+     * @param string $expectedValue
+     */
+    public function testPow($a, $b, $expectedValue)
+    {
+        $nativeCalculator = new NativeCalculator();
+        $this->assertSame($expectedValue, $nativeCalculator->pow($a, $b));
+    }
+
+    /**
+     * @return array
+     */
+    public function providerPow()
+    {
+        return [
+            ['123456789012345678901234567890', 0, '1'],
+
+            ['1', 2, '1'],
+            ['1234567891234567889999999', 1, '1234567891234567889999999'],
+
+            ['1234567891234567889999999', -2, '1'],
+            ['-1234567891234567889999999', 2, '1524157878067367851562259605883269630864220000001'],
+
+            ['1234567891234567889999999', 3, '1881676377434183981909558127466713752376807174114547646517403703669999999'],
+        ];
+    }
+}