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# Print Function Tests

This is an example of how you can test the output stream of a student defined function. 

This test makes sure the student's function named `print_hello()` prints `"Hello World"`.  It assumes the student's file name is `example.py`.  Replace the import with whatever you student's file name is. 

*Note:  This code converts the output to all lowercase and removes spaces to compare against the correct value.*

#### **Grading Tests:**

```python
import unittest
import sys, io

class CodingRoomsUnitTests(unittest.TestCase):

    def test_default_case(self):
        stdout = sys.stdout
        sys.stdout = io.StringIO()
        import example
        example.print_hello()
        output = sys.stdout.getvalue().strip("\n")
        sys.stdout = stdout
        answer = "Hello World".casefold().replace(" ", "")
        student = output.casefold().replace(" ", "")
        self.assertEqual(answer, student)

if __name__ == '__main__':
    unittest.main()
```

#### Sample Solution:

{% code title="example.py" %}

```python
def print_hello():
    print("Hello World")
```

{% endcode %}