The code should be in Python

Write unittests for search and match functions written in class.

`Empty string as a query

Empty document collection

Tests that differentiate string matching and Boolean term matching (i.e. the same inputs should return different outputs for different matching functions).

Test where string matching returns True, but you would not expect search to return the document.

More specifically, for search, you already have a test that includes both matching and non-matching documents. You should add

A test with an empty query

A test with an empty document list

For string_match, you already have a test for a match case, non-match case, and a partial word match case. You should add

A test with an empty query

A test with an empty document list

A test with a document matching a multi-word query

A test of string_match with a query-document pair where boolean_term_match function would return True, but string_match returns False

For boolean_term_match you should add tests for all the same inputs as you'll have for string_match (7 test functions).

In total you need to add 13 test cases (test functions) across all 3 functions under test (search, string_match, and boolean_term_match).