113 lines
2.5 KiB
Python
113 lines
2.5 KiB
Python
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from typing import Union
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import pytest
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from guardrails.classes.generic.stack import Stack
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@pytest.mark.parametrize(
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"stack,expected_value", [(Stack(1, 2, 3), False), (Stack(), True)]
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)
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def test_empty(stack: Stack, expected_value: bool):
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result = stack.empty()
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assert result == expected_value
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@pytest.mark.parametrize("stack,expected_value", [(Stack(1, 2, 3), 3), (Stack(), None)])
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def test_peek(stack: Stack, expected_value: Union[int, None]):
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elem = stack.peek()
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assert elem == expected_value
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@pytest.mark.parametrize(
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"stack,expected_value,expected_stack",
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[(Stack(1, 2, 3), 3, Stack(1, 2)), (Stack(), None, Stack())],
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)
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def test_pop(stack: Stack, expected_value: Union[int, None], expected_stack: Stack):
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elem = stack.pop()
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assert elem == expected_value
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assert stack == expected_stack
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def test_push():
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stack = Stack()
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stack.push(1)
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assert stack[0] == 1
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assert stack[-1] == 1
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stack.push(2)
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assert stack[0] == 1
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assert stack[-1] == 2
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def test_push_truncates():
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stack = Stack(max_length=1)
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stack.push(1)
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assert stack[0] == 1
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assert stack[-1] == 1
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stack.push(2)
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assert stack[0] == 2
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assert stack[-1] == 2
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@pytest.mark.parametrize(
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"search_value,expected_index", [(1, 0), (2, 4), (3, 5), (5, None)]
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)
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def test_search(search_value: int, expected_index: int):
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stack = Stack(1, 2, 3, 4, 2, 3)
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index = stack.search(search_value)
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assert index == expected_index
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@pytest.mark.parametrize("index,expected_value", [(1, 2), (3, None)])
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def test_at(index: int, expected_value: int):
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stack = Stack(1, 2, 3)
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elem = stack.at(index)
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assert elem == expected_value
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@pytest.mark.parametrize("stack,expected_value", [(Stack(1, 2, 3), 1), (Stack(), None)])
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def test_first(stack: Stack, expected_value: int):
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elem = stack.first
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assert elem == expected_value
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@pytest.mark.parametrize("stack,expected_value", [(Stack(1, 2, 3), 3), (Stack(), None)])
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def test_last(stack: Stack, expected_value: int):
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elem = stack.last
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assert elem == expected_value
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@pytest.mark.parametrize("stack,expected_value", [(Stack(1, 2, 3), 1), (Stack(), None)])
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def test_bottom(stack: Stack, expected_value: int):
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elem = stack.bottom
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assert elem == expected_value
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@pytest.mark.parametrize("stack,expected_value", [(Stack(1, 2, 3), 3), (Stack(), None)])
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def test_top(stack: Stack, expected_value: int):
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elem = stack.top
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assert elem == expected_value
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def test_length():
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stack = Stack()
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assert stack.length == 0
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stack.push(1)
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assert stack.length == 1
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