<?php
require_once 'CiviTest/CiviUnitTestCase.php';

/**
 * Class CRM_Utils_NumberTest
 */
class CRM_Utils_NumberTest extends CiviUnitTestCase {

  /**
   * @return array
   */
  public function randomDecimalCases() {
    $cases = array();
    // array(array $precision, int $expectedMinInclusive, int $expectedMaxExclusive)
    $cases[] = array(array(1, 0), 0, 10);
    $cases[] = array(array(5, 2), 0, 1000);
    $cases[] = array(array(10, 8), 0, 100);
    return $cases;
  }

  /**
   * @param array $precision
   * @param int $expectedMinInclusive
   * @param int $expectedMaxExclusive
   * @dataProvider randomDecimalCases
   */
  public function testCreateRandomDecimal($precision, $expectedMinInclusive, $expectedMaxExclusive) {
    list ($sigFigs, $decFigs) = $precision;
    for ($i = 0; $i < 10; $i++) {
      $decimal = CRM_Utils_Number::createRandomDecimal($precision);
      // print "Assert $decimal between $expectedMinInclusive and $expectedMaxExclusive\n";
      $this->assertTrue(($expectedMinInclusive <= $decimal) && ($decimal < $expectedMaxExclusive), "Assert $decimal between $expectedMinInclusive and $expectedMaxExclusive");
      if (strpos($decimal, '.') === FALSE) {
        $decimal .= '.';
      }
      list ($before, $after) = explode('.', $decimal);
      $this->assertTrue(strlen($before) + strlen($after) <= $sigFigs, "Assert $decimal [$before;$after] has <= $sigFigs sigFigs");
      $this->assertTrue(strlen($after) <= $decFigs, "Assert $decimal [$before;$after] has <= $decFigs decFigs");
    }
  }

  /**
   * @return array
   */
  public function truncDecimalCases() {
    $cases = array();
    // array($value, $precision, $expectedValue)
    $cases[] = array(523, array(1, 0), 5);
    $cases[] = array(523, array(5, 2), 523);
    $cases[] = array(523, array(10, 8), 52.3);
    $cases[] = array(12345, array(3, 3), 0.123);
    $cases[] = array(0.12345, array(10, 0), 12345);
    $cases[] = array(-123.45, array(4, 2), -12.34);
    return $cases;
  }

  /**
   * @param $value
   * @param $precision
   * @param $expectedValue
   * @dataProvider truncDecimalCases
   */
  public function testCreateTruncatedDecimal($value, $precision, $expectedValue) {
    list ($sigFigs, $decFigs) = $precision;
    $this->assertEquals($expectedValue, CRM_Utils_Number::createTruncatedDecimal($value, $precision),
      "assert createTruncatedValue($value, ($sigFigs,$decFigs)) == $expectedValue"
    );
  }

}