PhpSpreadsheet/unitTests/custom/complexAssert.php

<?php

include_once __DIR__.'/Complex.php';


class complexAssert {

	private $_errorMessage	= '';

    public function assertComplexEquals($expected, $actual, $delta = 0)
    {
        $expectedComplex = new Complex($expected);
        $actualComplex = new Complex($actual);

		if (!is_numeric($actualComplex->getReal()) || !is_numeric($expectedComplex->getReal())) {
			if ($actualComplex->getReal() !== $expectedComplex->getReal()) {
				$this->_errorMessage = 'Mismatched String: ' .
				                       $actualComplex->getReal() . ' !== ' . $expectedComplex->getReal();
	            return FALSE;
			}
			return TRUE;
		}

        if ($actualComplex->getReal() < ($expectedComplex->getReal() - $delta) ||
            $actualComplex->getReal() > ($expectedComplex->getReal() + $delta)) {
			$this->_errorMessage = 'Mismatched Real part: ' .
			                       $actualComplex->getReal() . ' != ' . $expectedComplex->getReal();
            return FALSE;
        }

        if ($actualComplex->getImaginary() < ($expectedComplex->getImaginary() - $delta) ||
            $actualComplex->getImaginary() > ($expectedComplex->getImaginary() + $delta)) {
			$this->_errorMessage = 'Mismatched Imaginary part: ' .
			                       $actualComplex->getImaginary() . ' != ' . $expectedComplex->getImaginary();
            return FALSE;
        }

        if ($actualComplex->getSuffix() !== $actualComplex->getSuffix()) {
			$this->_errorMessage = 'Mismatched Suffix: ' .
			                       $actualComplex->getSuffix() . ' != ' . $expectedComplex->getSuffix();
            return FALSE;
		}

        return TRUE;
    }


	public function getErrorMessage() {
		return $this->_errorMessage;
	}

}