# Return Function Tests

Each example assumes the students file name is `example#.py` replacing # with the actual example number.  You can call the functions by importing the student file name of your choice. 

## Example 1 - Add Five

Students write an function named `add_five()` that takes an integer as a parameter and returns 5 plus the parameter value. 

#### **Grading Tests:**

```java
import unittest

class CodingRoomsUnitTests(unittest.TestCase):

    def test_default_case(self):
        import example1
        self.assertEqual(10, example1.add_five(5))
        self.assertEqual(5, example1.add_five(0))
        self.assertEqual(11, example1.add_five(6))
```

#### Sample Solution:

{% code title="example1.py" %}

```python
def add_five(number):
    number += 5
    return number
```

{% endcode %}

## Example 2 - Average

Students write a function that takes 5 values as parameters and returns the average value of the 5 values.  The function must be named `average()` and it must have 5 parameters. 

Example: Calling `average(1, 5, 7, 4, 10)` would return `5.4`.

Note: Almost Equal assertion is used with a delta value as tolerance when comparing values.

#### **Grading Tests:**

```python
import unittest
import sys, io

class CodingRoomsUnitTests(unittest.TestCase):

    def test_default_case(self):
        import example2
        self.assertAlmostEqual(5.4, example2.average(1, 5, 7, 4, 10), delta=0.001)
        self.assertAlmostEqual(9.6, example2.average(5, 9, 24, 6, 4), delta=0.001)
       
if __name__ == '__main__':
    unittest.main()
```

#### Sample Solution:

{% code title="example2.py" %}

```python
def average(a, b, c, d, e):
    sum = a + b + c + d + e
    return sum / 5
```

{% endcode %}

## Example 3 - Repeats

Students write a function that takes a parameter. If the String parameter has a double letter (i.e. contains the same letter twice in a row) then it should return true. Otherwise, it should return false.

This function must be named `has_repeat()` and have a parameter. This function must return a `boolean`.

#### **Grading Tests:**

```python
import unittest
import sys, io

class CodingRoomsUnitTests(unittest.TestCase):

    def test_default_case(self):
        import example3
        self.assertTrue(example3.has_repeat("mississippi"))
        self.assertFalse(example3.has_repeat("capsized"))
        self.assertTrue(example3.has_repeat("mazzone"))
        self.assertFalse(example3.has_repeat("this"))
       
if __name__ == '__main__':
    unittest.main()
```

#### Sample Solution:

{% code title="example3.py" %}

```python
def has_repeat(word):
    count = 0
    for letter in word:
        if letter == word[count-1]:
            return True
        count += 1
    return False
```

{% endcode %}