Phpunit check a function that writes to a file and check the contents in the generated file

I contribute to sonata / exportorter , the library used to export data in many formats (CSV, JSON, XML, XLS, ...).

I am working on a Writer that converts boolean values ​​to strings (e.g. yes / no), encapsulating another Writer (e.g. CsvWriter or XlsWriter).

This is my first experience with phpunit.

All unit tests made on existing writers use this logic:
- Create a file.
- Writing data to a file using the appropriate format.
- Make assertEquals on file_get_contents(filename).

So, I wrote this test:

public function setUp()
{
    $this->filename = 'formatedbool.xls';
    $this->sampleWriter = new XlsWriter($this->filename, false);
    $this->trueLabel = 'oui';
    $this->falseLabel = 'non';

    if (is_file($this->filename)) {
        unlink($this->filename);
    }
}

public function testValidDataFormat()
{
    $writer = new FormatedBoolWriter($this->sampleWriter, $this->trueLabel, $this->falseLabel);
    $writer->open();
    $writer->write(array('john', 'doe', false, true));
    $writer->close();

    $expected = '<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name=ProgId content=Excel.Sheet><meta name=Generator content="https://github.com/sonata-project/exporter"></head><body><table><tr><td>john</td><td>doe</td><td>non</td><td>oui</td></tr></table></body></html>';
    $this->assertEquals($expected, trim(file_get_contents($this->filename)));
}

When sending my PR, the owner tells me:

mock , . . https://phpunit.de/manual/current/en/test-doubles.html#test-doubles.mock-objects.examples.with-consecutive.php

Mock, file_get_contents, .

"write" .

, , bools, , . ? $ ?

EDIT @Cerad, , :

public function testValidDataFormat()
{
    $data = array('john', 'doe', false, true);
    $expected =  array('john', 'doe', 'no', 'yes');
    $mock = $this->getMockBuilder('Exporter\Writer\XlsWriter')
                   ->setConstructorArgs(array('formattedbool.xls', false))
                   ->getMock();
    $mock->expects($this->any())
           ->method('write')
           ->with($this->equalTo($expected));
    $writer = new FormattedBoolWriter($mock, $this->trueLabel, $this->falseLabel);
    $writer->open();
    $writer->write($data);
    $writer->close();
}

.

EDIT PR https://github.com/sonata-project/exporter/pull/56

+4

Source: https://habr.com/ru/post/1616558/


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