def must_catch_duplicate_course_by_name(previous):
return must_catch_ValueError(
'Attempt to create course with duplicate name {!r} (already exists: {})'.format(
previous.name,
previous,
),
)
def must_catch_duplicate(type_name, name, number):
return must_catch_ValueError(
"Attempt to create a {} with duplicate #{} (duplicate of: {})".format(
type_name,
number,
"<{} {!r} #{}>".format(type_name, name, number),
), )
def test_cannot_join_nonexistent_course():
alice = create_Student('Alice', 1)
stamp_collecting = 'How to collect stamps for fun & profit'
with must_catch_ValueError('Failed to find a course named {!r}'.format(stamp_collecting)):
alice.join_course(stamp_collecting)
def must_catch_duplicate(type_name, previous):
return must_catch_ValueError(
"Attempt to create a {} with duplicate #{} (duplicate of: {})".format(
type_name,
previous.number,
previous,
),
)
def test_cannot_join_same_course_twice():
alice = create_Teacher('Alice', 1)
math = create_Course('Math', 1, alice)
bob = create_Student('Bob', 2)
bob.join_course('Math')
with must_catch_ValueError('{} has already joined course {}; cannot join a second time'.format(bob, math)):
bob.join_course('Math')
def test_cannot_create_course_with_duplciate_name():
alice = create_Teacher('Alice', 1)
math_by_alice = create_Course('Math', 1, alice)
bob = create_Teacher('Bob', 2)
with must_catch_ValueError(
'Attempt to create course with duplicate name {!r} (already exists: {})'.format(
'Math',
math_by_alice
),
):
math_by_bob = create_Course('Math', 2, bob)
def test_cannot_learn_fact_with_same_name_twice():
alice = create_Student('Alice', 1)
false_fact__1_plus_1__is__1 = create_false_fact('What is 1+1?', 'One')
true_fact__1_plus_1__is__2 = create_true_fact ('What is 1+1?', 'Two')
alice.teach(false_fact__1_plus_1__is__1)
with must_catch_ValueError(
'{} already knows {}; cannot be taught {}'.format(
alice,
false_fact__1_plus_1__is__1,
true_fact__1_plus_1__is__2,
),
):
alice.teach(true_fact__1_plus_1__is__2)
def raise_wrong_exception():
with must_catch_ValueError('Correct'):
raise wrong_exception
def fail_to_raise_a_ValueError():
with must_catch_ValueError('Oops'):
pass
def test_must_catch_ValueError__positive():
with must_catch_ValueError('Oops'):
raise ValueError('Oops')
def attempt_to_load_a_set_of_people_that_includes_an_invalid_person_type(context, invalid_person_type):
with must_catch_ValueError(
'unknown person type: {!r}'.format(invalid_person_type)
) as context.caught:
for [i, [is_teacher, name, number]] in enumerate(iterate_students_and_teachers(context)):
create_student_or_teacher__and__print(i, is_teacher, name, number)