def test_delete_task_does_nothing_if_no_tasks():
""" delete_task() does nothing if there are no tasks """
# Given
plan = ResearchPlan()
# When
plan.delete_task(1)
# Then
assert len(plan.tasks) == 0
def test_delete_task_does_nothing_if_index_out_of_bounds():
""" delete_task() does nothing if the index is too large """
# Given
plan = ResearchPlan()
task_one = ResearchTask()
task_two = ResearchTask()
task_three = ResearchTask()
plan.tasks.append(task_one)
plan.tasks.append(task_two)
plan.tasks.append(task_three)
# When
plan.delete_task(5)
# Then
assert len(plan.tasks) == 3
def test_delete_task_deletes_the_specified_task():
""" delete_task() does nothing if there are no tasks """
# Given
plan = ResearchPlan()
task_one = ResearchTask()
task_two = ResearchTask()
task_three = ResearchTask()
plan.tasks.append(task_one)
plan.tasks.append(task_two)
plan.tasks.append(task_three)
# When
plan.delete_task(1)
# Then
assert len(plan.tasks) == 2
assert plan.tasks[0] == task_one
assert plan.tasks[1] == task_three