PHPUnit "linking" functions

Question

I'm writing unit tests for a project I'm working on and I'm trying to figure out how to effectively write tests to test this.

I currently have the following methods:

Object::createNew()
Object->delete()

My concern is how do I write unit tests to properly test this effectively because I'm having a hard time thinking about how to "tie" these functions together. So for example,

<?php

public function testObjectCreation() {
    $object = Object::createNew("my parameters");

    // ... asserts

    // I don't want to keep the object so I delete it
    // but I don't want test that deleting works here too, I want to separate it
    $object->delete();
}

// Where would I get an object to test that deleting works?
public function testObjectDeletion() {
    // ...stuff
    $object->delete();
}

public function testUnrelatedObjectFunctions () {}

So my question is, how could I feed one object to the other function. Would I have to make testObjectCreation() be static and then feed it to testObjectDeletion() with @dataProvider or would I have to store $object in a private/protected variable that would only be used in these two functions? If I make it static, wouldn't I lose access to the assert functions provided by PHPUnit?

Chris · Accepted Answer · 2015-10-30 18:50:02Z

1

This looks like a good case for the @depends annotation. This allows you to return something in one test and use it as a parameter in another.

Here is an example from the phpunit docs:

public function testEmpty()
{
    $stack = array();
    $this->assertEmpty($stack);

    return $stack;
}

/**
 * @depends testEmpty
 */
public function testPush(array $stack)
{
    array_push($stack, 'foo');
    $this->assertEquals('foo', $stack[count($stack)-1]);
    $this->assertNotEmpty($stack);

    return $stack;
}

answered Oct 30, 2015 at 18:50

Chris

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1 Comment

allejo Over a year ago

This is exactly what I was looking for! Thank you so much

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