phpunitHow to use an inline dataprovider in PHPUnit?

Inline dataproviders are used to provide data to a test method in PHPUnit. It is a simple way to pass multiple sets of data to a test method.

Example code

public function provider()
{
    return [
        [1, 2, 3],
        [4, 5, 9],
        [7, 8, 15]
    ];
}

/**
 * @dataProvider provider
 */
public function testAdd($a, $b, $expected)
{
    $this->assertEquals($expected, $a + $b);
}

Output example

OK (3 tests, 3 assertions)

Code explanation

• public function provider(): This is the function that returns the data to be used in the test method.
• @dataProvider provider: This is the annotation that tells PHPUnit which function to use as the data provider.
• $this->assertEquals($expected, $a + $b): This is the assertion that is used to check the result of the test.

Helpful links

• PHPUnit Documentation - Data Providers

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