initialized exercise 20

exercises/20-Random-Colors-Loop/README.md

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+# `20` Random Colors (Loop)
+
+We have created a function that returns a color based on a number between 1 and 4 (for any different number, it will return the color black).
+
+## 📝 Instructions:
+
+Let's say that we are teachers in a 10 student classroom and we want to randomly assign ONE color, between red, yellow, blue and green, to EACH student.
+
+(only ONE color PER student)
+
+1. Change the function "**getAllStudentColors**" so it returns an array of 10 colors, with each item in the array representing the color assigned to each student.
+
+## 💡 Hint:
+
+- You have 10 students, you need to loop 10 times.
+- Each time you loop, generate a random number between 1-4 using the **Math.random()** function we saw on the last exercise.
+- Use the "**getColor**" function on this exercise to get the color name from the number you get.
+- Print the color on the console.
+
+## IMPORTANT MESSAGE:
+
+If you feel you are not understanding looping, its a good idea to complete the Arrays Exercises classroom and then come back here:
+```sh
+https://repl.it/classroom/invite/BB4WDpk
+```

exercises/20-Random-Colors-Loop/test.py

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+import io
+import sys
+sys.stdout = buffer = io.StringIO()
+
+from app import my_function
+import pytest
+
+@pytest.mark.it('Your code needs to print hello on the console')
+def test_for_file_output(capsys):
+ captured = buffer.getvalue()
+ assert captured == "hello\n" #add \n because the console jumps the line on every print
+
+@pytest.mark.it('Your function needs to print "Hello Inside Function" on the console')
+def test_for_function_output(capsys):
+ my_function()
+ captured = capsys.readouterr()
+ assert captured.out == "Hello Inside Function\n"
+
+@pytest.mark.it('Your function needs to return True')
+def test_for_function_return(capsys):
+ assert my_function() == True