Mock IteratorAggregate with Mockery to Fix foreach in Tests

📰 Dev.to · Recca Tsai

Learn to fix foreach issues in PHPUnit tests by mocking IteratorAggregate with Mockery

intermediate Published 3 Mar 2026

Action Steps

Use Mockery to mock the IteratorAggregate class
Implement the getIterator method to return an ArrayObject
Configure the ArrayObject to contain test data
Test the foreach loop with the mocked IteratorAggregate
Verify that the foreach loop iterates over the test data correctly

Who Needs to Know This

Developers working with PHPUnit and Mockery can benefit from this solution to ensure their tests run smoothly and accurately

Key Insight

💡 Return an ArrayObject from the mocked getIterator method to make foreach work correctly

Key Takeaways

Learn to fix foreach issues in PHPUnit tests by mocking IteratorAggregate with Mockery

Full Article

Mocking IteratorAggregate breaks foreach in PHPUnit. Return an ArrayObject from the mocked getIterator method to make foreach iterate over test data correctly.

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