What are best practices for handling exceptions in PHP setters, considering the impact on unit testing?

When handling exceptions in PHP setters, it is important to throw exceptions when invalid values are passed to the setter method. This helps enforce data validation and maintain data integrity. To ensure that exceptions are properly handled in unit tests, you can use try-catch blocks in your test cases to catch and assert the expected exceptions. 

class MyClass {
    private $value;

    public function setValue($value) {
        if (!is_numeric($value)) {
            throw new InvalidArgumentException("Value must be numeric");
        }
        $this->value = $value;
    }

    public function getValue() {
        return $this->value;
    }
}

// Unit test example
class MyClassTest extends PHPUnit_Framework_TestCase {
    public function testSetValueWithNonNumericValue() {
        $myClass = new MyClass();
        try {
            $myClass->setValue("abc");
            $this->fail("Expected exception not thrown");
        } catch (InvalidArgumentException $e) {
            $this->assertEquals("Value must be numeric", $e->getMessage());
        }
    }
}

Keywords

exceptions PHP setters unit testing error handling testing impact

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