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1 <?php
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2 /*
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3 * This file is part of the Comparator package.
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4 *
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5 * (c) Sebastian Bergmann <sebastian@phpunit.de>
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6 *
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7 * For the full copyright and license information, please view the LICENSE
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8 * file that was distributed with this source code.
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9 */
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10
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11 namespace SebastianBergmann\Comparator;
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12
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13 /**
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14 * Compares doubles for equality.
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15 */
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16 class DoubleComparator extends NumericComparator
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17 {
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18 /**
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19 * Smallest value available in PHP.
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20 *
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21 * @var float
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22 */
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23 const EPSILON = 0.0000000001;
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24
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25 /**
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26 * Returns whether the comparator can compare two values.
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27 *
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28 * @param mixed $expected The first value to compare
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29 * @param mixed $actual The second value to compare
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30 * @return bool
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31 */
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32 public function accepts($expected, $actual)
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33 {
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34 return (is_double($expected) || is_double($actual)) && is_numeric($expected) && is_numeric($actual);
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35 }
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36
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37 /**
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38 * Asserts that two values are equal.
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39 *
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40 * @param mixed $expected First value to compare
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41 * @param mixed $actual Second value to compare
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42 * @param float $delta Allowed numerical distance between two values to consider them equal
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43 * @param bool $canonicalize Arrays are sorted before comparison when set to true
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44 * @param bool $ignoreCase Case is ignored when set to true
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45 *
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46 * @throws ComparisonFailure
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47 */
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48 public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
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49 {
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50 if ($delta == 0) {
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51 $delta = self::EPSILON;
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52 }
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53
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54 parent::assertEquals($expected, $actual, $delta, $canonicalize, $ignoreCase);
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55 }
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56 }
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