from hypothesis import given, strategies as st

class Probe:
    def __init__(self, value):
        self.value = value
        self.count = 0

    def __hash__(self):
        return hash(self.value)

    def __eq__(self, other):
        self.count += 1
        return other is self

@given(st.text())
def test_str(value):
    probe = Probe(value)
    assert value not in {probe}
    assert probe.count == 1

@given(st.integers())
def test_int(value):
    probe = Probe(value)
    assert value not in {probe}
    assert probe.count == 1