174 lines
3.6 KiB
Python
174 lines
3.6 KiB
Python
import pytest
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from fifth_stack import FifthStack
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# Test the functions
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def test_push_and_pop():
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stack = FifthStack()
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stack.push(10)
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stack.push(20)
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assert stack.stack == [10, 20]
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stack.pop()
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assert stack.stack == [10]
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stack.pop()
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assert stack.stack == []
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def test_push_invalid_value(capsys):
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stack = FifthStack()
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stack.push("abc")
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captured = capsys.readouterr()
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assert "ERROR: integer required" in captured.out
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assert stack.stack == []
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def test_pop_empty_stack(capsys):
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stack = FifthStack()
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stack.pop()
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captured = capsys.readouterr()
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assert "ERROR: stack empty" in captured.out
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def test_swap():
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stack = FifthStack()
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stack.push(1)
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stack.push(2)
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stack.swap()
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assert stack.stack == [2, 1]
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def test_swap_insufficient_elements(capsys):
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stack = FifthStack()
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stack.push(1)
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stack.swap()
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captured = capsys.readouterr()
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assert "ERROR: two numbers required" in captured.out
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assert stack.stack == [1]
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def test_dup():
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stack = FifthStack()
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stack.push(5)
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stack.dup()
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assert stack.stack == [5, 5]
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def test_dup_empty_stack(capsys):
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stack = FifthStack()
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stack.dup()
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captured = capsys.readouterr()
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assert "ERROR: stack empty" in captured.out
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def test_addition():
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stack = FifthStack()
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stack.push(2)
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stack.push(3)
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stack.execute("+")
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assert stack.stack == [5]
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def test_subtraction():
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stack = FifthStack()
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stack.push(5)
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stack.push(2)
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stack.execute("-")
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assert stack.stack == [3]
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def test_multiplication():
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stack = FifthStack()
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stack.push(4)
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stack.push(3)
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stack.execute("*")
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assert stack.stack == [12]
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def test_division():
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stack = FifthStack()
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stack.push(8)
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stack.push(2)
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stack.execute("/")
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assert stack.stack == [4]
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def test_division_by_zero(capsys):
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stack = FifthStack()
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stack.push(8)
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stack.push(0)
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stack.execute("/")
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captured = capsys.readouterr()
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assert "ERROR: division by zero" in captured.out
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assert stack.stack == [8, 0]
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def test_binary_op_insufficient_elements(capsys):
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stack = FifthStack()
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stack.push(1)
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stack.execute("+")
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captured = capsys.readouterr()
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assert "ERROR: two numbers required" in captured.out
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assert stack.stack == [1]
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# Test executions
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def test_execute_unknown_command(capsys):
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stack = FifthStack()
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stack.execute("foobar")
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captured = capsys.readouterr()
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assert "ERROR: unknown command" in captured.out
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def test_execute_push_command():
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stack = FifthStack()
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stack.execute("push 42")
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assert stack.stack == [42]
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def test_execute_pop_command():
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stack = FifthStack()
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stack.push(99)
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stack.execute("pop")
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assert stack.stack == []
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def test_execute_swap_command():
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stack = FifthStack()
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stack.push(1)
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stack.push(2)
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stack.execute("swap")
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assert stack.stack == [2, 1]
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def test_execute_dup_command():
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stack = FifthStack()
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stack.push(7)
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stack.execute("dup")
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assert stack.stack == [7, 7]
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# Help and edge cases
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def test_help(capsys):
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stack = FifthStack()
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stack.help()
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captured = capsys.readouterr()
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assert "Available commands:" in captured.out
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assert "Available operations:" in captured.out
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def test_execute_empty_command():
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stack = FifthStack()
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stack.execute("") # Should do nothing
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assert stack.stack == []
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def test_execute_whitespace_command():
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stack = FifthStack()
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stack.execute(" ") # Should do nothing
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assert stack.stack == []
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def test_case_insensitivity():
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stack = FifthStack()
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stack.execute("PUSH 42")
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assert stack.stack == [42]
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