Tests-test-the-code-R.md

layout	topic	title	language
exercise	Tests	Test the Code	R

This is a follow up to [Debug the Code]({{ site.baseurl }}/exercises/Debugging-debug-the-code-R).

Write tests for your 'Debug the Code' code for the following cases and save it in a file called Tests-R.R. Make corrections/improvements to the 'Debug the Code' code so that all of your tests pass.

test_that("get_gc_content() works",

1. on a sequence represented by upper case string.
2. on a sequence represented by lower case string.
3. on a sequence represented by mixed case string.
4. on a sequence represented by multiline string.

In an email accompanying your "updated" code, Dr. Morales indicated that the specifications for the earlength size classes were:

1. extralarge: earlength >= 15
2. large: 10 <= earlength < 15
3. medium: 8 <= earlength < 10
4. small: earlength < 8

test_that("get_size_class() works",

1. for each case when the numbers are in the range,
2. for the edgecases of 8, 10, and 15,
3. but the function fails if non-numerical values are input as an argument (e.g., a string from a header row that didn't get removed).