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1 <?php
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2 /*
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3 * This file is part of sebastian/comparator.
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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 numerical values for equality.
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15 */
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16 class NumericComparator extends ScalarComparator
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17 {
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18 /**
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19 * Returns whether the comparator can compare two values.
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20 *
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21 * @param mixed $expected The first value to compare
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22 * @param mixed $actual The second value to compare
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23 *
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24 * @return bool
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25 */
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26 public function accepts($expected, $actual)
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27 {
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28 // all numerical values, but not if one of them is a double
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29 // or both of them are strings
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30 return \is_numeric($expected) && \is_numeric($actual) &&
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31 !(\is_float($expected) || \is_float($actual)) &&
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32 !(\is_string($expected) && \is_string($actual));
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33 }
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34
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35 /**
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36 * Asserts that two values are equal.
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37 *
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38 * @param mixed $expected First value to compare
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39 * @param mixed $actual Second value to compare
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40 * @param float $delta Allowed numerical distance between two values to consider them equal
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41 * @param bool $canonicalize Arrays are sorted before comparison when set to true
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42 * @param bool $ignoreCase Case is ignored when set to true
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43 *
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44 * @throws ComparisonFailure
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45 */
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46 public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
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47 {
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48 if (\is_infinite($actual) && \is_infinite($expected)) {
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49 return;
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50 }
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51
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52 if ((\is_infinite($actual) xor \is_infinite($expected)) ||
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53 (\is_nan($actual) or \is_nan($expected)) ||
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54 \abs($actual - $expected) > $delta) {
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55 throw new ComparisonFailure(
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56 $expected,
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57 $actual,
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58 '',
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59 '',
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60 false,
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61 \sprintf(
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62 'Failed asserting that %s matches expected %s.',
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63 $this->exporter->export($actual),
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64 $this->exporter->export($expected)
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65 )
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66 );
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67 }
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68 }
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69 }
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