Eris\Generator\StringGeneratorTest::testRandomlyPicksLengthAndCharacters PHP Method

    public function testRandomlyPicksLengthAndCharacters()
    {
        $size = 10;
        $generator = new StringGenerator();
        $lengths = [];
        $usedChars = [];
        for ($i = 0; $i < 1000; $i++) {
            $value = $generator($size, $this->rand)->unbox();
            $length = strlen($value);
            $this->assertLessThanOrEqual(10, $length);
            $lengths = $this->accumulateLengths($lengths, $length);
            $usedChars = $this->accumulateUsedChars($usedChars, $value);
        }
        $this->assertSame(11, count($lengths));
        // only readable characters
        $this->assertEquals(126 - 32, count($usedChars));
    }