def test_metric_invalid_step():
with pytest.raises(ValueError) as e:
Metric('key', 100, step='One')
assert "Step can only be an integer >= 0" in str(e.value)
with pytest.raises(ValueError) as e:
Metric('key', 100, step=-1)
assert "Step can only be an integer >= 0" in str(e.value)
with pytest.raises(ValueError) as e:
Metric('key', 100, step=2.3)
assert "Step can only be an integer >= 0" in str(e.value)
def test_metric_invalid_changing_step():
metric = Metric('key', 100, step=1)
with pytest.raises(ValueError) as e:
metric.step = 'One'
assert "Step can only be an integer >= 0" in str(e.value)
def test_metric_valid_step():
metric = Metric('key', 100, step=1)
assert 1 == metric.step
metric.step = 0
assert 0 == metric.step
def test_metric_invalid_reassign_value():
metric = Metric('key', 100)
with pytest.raises(ValueError) as e:
metric.value = 'value'
assert "Value of a metric can only be a number" in str(e.value)
def test_metric_invalid_reassign_key():
metric = Metric('key', 100)
with pytest.raises(ValueError) as e:
metric.key = 1999
assert "Key of a metric can only be a string" in str(e.value)
def test_metric_invalid_value():
with pytest.raises(ValueError) as e:
Metric('key', 'value')
assert "Value of a metric can only be a number" in str(e.value)
def test_metric_invalid_key():
with pytest.raises(ValueError) as e:
Metric(100, 100)
assert "Key of a metric can only be a string" in str(e.value)
def test_metric_creates_object():
metric = Metric('key', 100)
assert 'key' == metric.key
assert 100 == metric.value
assert None is metric.step