以不同的测试方法写十个测试用生例

好的，下面是十个测试用例，分别使用了不同的测试方法：

1. 边界值分析法：

def test_divide():
    assert divide(1, 1) == 1
    assert divide(0, 1) == 0
    assert divide(1, 0) == "Error: division by zero"
    assert divide(2147483647, 1) == 2147483647
    assert divide(-2147483648, 1) == -2147483648
    assert divide(1, 2147483647) == 0
    assert divide(1, -2147483648) == 0
    assert divide(-2147483648, -1) == 2147483648
    assert divide(2147483647, -1) == -2147483647
    assert divide(2147483647, 2) == 1073741823

2. 等价类划分法：

def test_login():
    assert login("username", "password") == "Login successful"
    assert login("", "password") == "Error: invalid username or password"
    assert login("username", "") == "Error: invalid username or password"
    assert login(" ", "password") == "Error: invalid username or password"
    assert login("username", " ") == "Error: invalid username or password"
    assert login(None, "password") == "Error: invalid username or password"
    assert login("username", None) == "Error: invalid username or password"

3. 因果图法：

def test_shopping_cart():
    shopping_cart = ShoppingCart()
    assert shopping_cart.get_total_quantity() == 0
    assert shopping_cart.get_total_price() == 0
    shopping_cart.add_item("item1", 10, 2)
    assert shopping_cart.get_total_quantity() == 2
    assert shopping_cart.get_total_price() == 20
    shopping_cart.remove_item("item1")
    assert shopping_cart.get_total_quantity() == 0
    assert shopping_cart.get_total_price() == 0

4. 错误推测法：

def test_database():
    database = Database()
    assert database.get_user("username") == None
    database.add_user("username", "password")
    assert database.get_user("username") == User("username", "password")
    assert database.get_user("username2") == None
    database.delete_user("username")
    assert database.get_user("username") == None

5. 边界值和等价类组合法：

def test_triangle():
    assert get_triangle_type(1, 1, 1) == "equilateral"
    assert get_triangle_type(2, 2, 1) == "isosceles"
    assert get_triangle_type(200, 200, 1) == "isosceles"
    assert get_triangle_type(3, 4, 5) == "scalene"
    assert get_triangle_type(2147483647, 2147483647, 2147483647) == "equilateral"
    assert get_triangle_type(2147483647, 2147483647, 1) == "isosceles"
    assert get_triangle_type(2147483647, 1, 1) == "scalene"
    assert get_triangle_type(0, 1, 2) == "invalid"
    assert get_triangle_type(1, 1, -1) == "invalid"
    assert get_triangle_type(1, 1, 2147483647) == "invalid"

6. 判定覆盖法：

def test_search():
    search_engine = SearchEngine()
    search_engine.add_document("document1", "this is a test document")
    search_engine.add_document("document2", "this is another test document")
    assert search_engine.search("test") == ["document1", "document2"]
    assert search_engine.search("another") == ["document2"]
    assert search_engine.search("") == []

7. 边界值组合法：

def test_calculator():
    calculator = Calculator()
    assert calculator.add(0, 0) == 0
    assert calculator.add(2147483647, 1) == "Error: integer overflow"
    assert calculator.divide(1, 0) == "Error: division by zero"
    assert calculator.divide(2147483647, 2) == 1073741823
    assert calculator.multiply(-2147483648, 2) == "Error: integer overflow"
    assert calculator.subtract(0, 0) == 0
    assert calculator.subtract(-2147483648, 1) == 2147483647
    assert calculator.subtract(2147483647, -1) == -2147483648
    assert calculator.subtract(1, 2147483647) == -2147483646
    assert calculator.subtract(-2147483648, -1) == -2147483647

8. 边界值和误用情况组合法：

def test_filesystem():
    filesystem = Filesystem()
    assert filesystem.create_file("test.txt") == "File created"
    assert filesystem.create_file("test.txt") == "Error: file already exists"
    assert filesystem.create_file("") == "Error: invalid filename"
    assert filesystem.create_file(None) == "Error: invalid filename"
    assert filesystem.rename_file("test.txt", "new_test.txt") == "File renamed"
    assert filesystem.rename_file("test.txt", "new_test.txt") == "Error: file does not exist"
    assert filesystem.rename_file("", "new_test.txt") == "Error: invalid filename"
    assert filesystem.rename_file(None, "new_test.txt") == "Error: invalid filename"
    assert filesystem.delete_file("new_test.txt") == "File deleted"
    assert filesystem.delete_file("new_test.txt") == "Error: file does not exist"

9. 边界值和特殊值组合法：

def test_string():
    assert reverse_string("Hello, world!") == "!dlrow ,olleH"
    assert reverse_string("") == ""
    assert reverse_string(None) == None
    assert reverse_string("H") == "H"
    assert reverse_string("HH") == "HH"
    assert reverse_string("HHH") == "HHH"
    assert reverse_string("HHHH") == "HHHH"
    assert reverse_string("HHHHH") == "HHHHH"
    assert reverse_string("HHHHHH") == "HHHHHH"
    assert reverse_string("HHHHHHH") == "HHHHHHH"

10. 随机测试法：

def test_sort():
    for i in range(10):
        lst = [random.randint(-100, 100) for j in range(random.randint(0, 1000))]
        sorted_lst = sorted(lst)
        assert sort(lst) == sorted_lst