yessir

book_stuff/test_book.py

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+import pytest
+
+from book import Book
+
+_default_title = 'My Boke'
+_default_authors = ['Eliott Wootton', 'John Smith']
+_default_isbn = '1234567890123'
+_default_cost = 14.99
+
+@pytest.fixture
+def valid_book():
+    return Book(_default_title, _default_authors, _default_isbn, _default_cost)
+
+# test if book setter works
+def test_create_valid_book(valid_book: Book):
+    assert valid_book.get_title() == _default_title
+    assert valid_book.get_authors() == _default_authors
+    assert valid_book.get_isbn() == _default_isbn
+    assert valid_book.get_cost() == _default_cost
+
+# test if title setter works
+def test_update_title(valid_book: Book):
+    valid_book.set_title('My Book')
+    assert valid_book.get_title() == 'My Book'
+
+# test if authors setter works
+def test_update_authors(valid_book: Book):
+    valid_book.set_authors(['John Smith', 'Jane Smith'])
+    assert valid_book.get_authors() == ['John Smith', 'Jane Smith']
+
+# test if isbn setter works
+def test_update_isbn(valid_book: Book):
+    valid_book.set_isbn('3210987654321')
+    assert valid_book.get_isbn() == '3210987654321'
+
+# test is cost setter works
+def test_update_cost(valid_book: Book):
+    valid_book.set_cost(9.99)
+    assert valid_book.get_cost() == 9.99
+
+# test if repr works
+def test_repr_str(valid_book):
+    rep = str(valid_book)
+    assert _default_title in rep
+    assert ', '.join(_default_authors) in rep
+    assert _default_isbn in rep
+    assert str(_default_cost) in rep
+
+"""
+- Title must not be blank, and cannot be longer than 255 characters.
+- Authors is a list of names.  None of the names should be blank or over 255 characters.
+  Names should not have any characters except for alphabetical ones.
+- ISBN is a string, but it can only contain numbers and there must be 13 of them.
+- Cost cannot be negative.
+"""
+
+# test if empty, length > 255, and if string
+@pytest.mark.parametrize("invalid_title", [
+    "",
+    "A" * 256,
+    6.7
+])
+def test_invalid_title_raises(invalid_title: str):
+    with pytest.raises((ValueError, TypeError)):
+        Book(invalid_title, _default_authors, _default_isbn, _default_cost)
+
+# test if empty, is array, each author's name is str, each author's name > 255 and each author's name alpha
+@pytest.mark.parametrize("invalid_authors", [
+    [],
+    'Eliott Wootton',
+    [41, 'Charleston White'],
+    ['LeBron James', 'A'*256],
+    ['3liott W00tt0n', 'hello world']
+])
+def test_invalid_authors_raised(invalid_authors: str):
+    with pytest.raises((ValueError, TypeError)):
+        Book(_default_title, invalid_authors, _default_isbn, _default_cost)
+
+# test if string, only contains numbers and length is 13
+@pytest.mark.parametrize("invalid_isbn", [
+    127,
+    '123456789o123',
+    '12345678901234'
+])
+def test_invalid_isbn_raises(invalid_isbn: str):
+    with pytest.raises((ValueError, TypeError)):
+        Book(_default_title, _default_authors, invalid_isbn, _default_cost)
+
+# test if float and not negative
+@pytest.mark.parametrize("invalid_cost", [
+    '14.99',
+    -14.99
+])
+def test_invalid_cost_raises(invalid_cost: str):
+    with pytest.raises((ValueError, TypeError)):
+        Book(_default_title, _default_authors, _default_isbn, invalid_cost)