def test_apply(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
leaves = tree.apply(causal_X)
assert isinstance(leaves, np.ndarray)
assert np.all(leaves > 0)
assert len(leaves) == len(causal_X)
def test_mtry(self, causal_X, causal_y, causal_w, mtry):
tree = GRFTreeInstrumentalRegressor(mtry=mtry)
tree.fit(causal_X, causal_y, causal_w, causal_w)
if mtry is not None:
assert tree.mtry_ == mtry
else:
assert tree.mtry_ == 5
def test_with_X_nan(self, causal_X, causal_y, causal_w):
causal_X_nan = causal_X.copy()
index = np.random.choice(causal_X_nan.size, 100, replace=False)
causal_X_nan.ravel()[index] = np.nan
assert np.sum(np.isnan(causal_X_nan)) == 100
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X_nan, causal_y, causal_w, causal_w)
pred = tree.predict(causal_X_nan)
assert len(pred) == causal_X_nan.shape[0]
def test_fit(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
with pytest.raises(NotFittedError):
check_is_fitted(tree)
tree.fit(causal_X, causal_y, causal_w, causal_w)
check_is_fitted(tree)
assert hasattr(tree, "grf_forest_")
assert hasattr(tree, "mtry_")
assert tree.grf_forest_["num_trees"] == 1
assert tree.criterion == "mse"
def test_equalize_cluster_weights(
self,
causal_X,
causal_y,
causal_w,
causal_cluster,
equalize_cluster_weights,
):
tree = GRFTreeInstrumentalRegressor(
equalize_cluster_weights=equalize_cluster_weights)
tree.fit(causal_X,
causal_y,
causal_w,
causal_w,
cluster=causal_cluster)
if equalize_cluster_weights:
assert tree.samples_per_cluster_ == 20
else:
assert tree.samples_per_cluster_ == causal_y.shape[0] - 20
if equalize_cluster_weights:
with pytest.raises(ValueError):
tree.fit(
causal_X,
causal_y,
causal_w,
causal_w,
cluster=causal_cluster,
sample_weight=causal_y,
)
tree.fit(causal_X, causal_y, causal_w, causal_w, cluster=None)
assert tree.samples_per_cluster_ == 0
def test_serialize(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
# not fitted
tf = tempfile.TemporaryFile()
pickle.dump(tree, tf)
tf.seek(0)
tree = pickle.load(tf)
tree.fit(causal_X, causal_y, causal_w, causal_w)
# fitted
tf = tempfile.TemporaryFile()
pickle.dump(tree, tf)
tf.seek(0)
new_tree = pickle.load(tf)
pred = new_tree.predict(causal_X)
assert len(pred) == causal_X.shape[0]
def test_tree_interface(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
# access attributes the way we would expect to in sklearn
tree_ = tree.tree_
children_left = tree_.children_left
children_right = tree_.children_right
children_default = tree_.children_default
feature = tree_.feature
threshold = tree_.threshold
max_depth = tree_.max_depth
n_node_samples = tree_.n_node_samples
weighted_n_node_samples = tree_.weighted_n_node_samples
node_count = tree_.node_count
capacity = tree_.capacity
n_outputs = tree_.n_outputs
n_classes = tree_.n_classes
value = tree_.value
def test_alpha(self, causal_X, causal_y, causal_w, alpha):
tree = GRFTreeInstrumentalRegressor(alpha=alpha)
if alpha <= 0 or alpha >= 0.25:
with pytest.raises(ValueError):
tree.fit(causal_X, causal_y, causal_w, causal_w)
else:
tree.fit(causal_X, causal_y, causal_w, causal_w)
def test_sample_fraction(self, causal_X, causal_y, causal_w,
sample_fraction):
tree = GRFTreeInstrumentalRegressor(sample_fraction=sample_fraction)
if sample_fraction <= 0 or sample_fraction > 1:
with pytest.raises(ValueError):
tree.fit(causal_X, causal_y, causal_w, causal_w)
else:
tree.fit(causal_X, causal_y, causal_w, causal_w)
def test_honesty_fraction(self, causal_X, causal_y, causal_w,
honesty_fraction):
tree = GRFTreeInstrumentalRegressor(honesty=True,
honesty_fraction=honesty_fraction,
honesty_prune_leaves=True)
if honesty_fraction <= 0 or honesty_fraction >= 1:
with pytest.raises(RuntimeError):
tree.fit(causal_X, causal_y, causal_w, causal_w)
else:
tree.fit(causal_X, causal_y, causal_w, causal_w)
def test_get_n_leaves(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
leaves = tree.get_n_leaves()
assert isinstance(leaves, int)
assert np.all(leaves > 0)
def test_clone(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
clone(tree)
def test_honesty(self, causal_X, causal_y, causal_w, honesty):
tree = GRFTreeInstrumentalRegressor(honesty=honesty)
tree.fit(causal_X, causal_y, causal_w, causal_w)
def test_predict(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
pred = tree.predict(causal_X)
assert len(pred) == causal_X.shape[0]
def test_honesty_prune_leaves(self, causal_X, causal_y, causal_w,
honesty_prune_leaves):
tree = GRFTreeInstrumentalRegressor(
honesty=True, honesty_prune_leaves=honesty_prune_leaves)
tree.fit(causal_X, causal_y, causal_w, causal_w)
def test_init(self):
_ = GRFTreeInstrumentalRegressor()
def test_decision_path(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
paths = tree.decision_path(causal_X)
assert isinstance(paths, csr_matrix)
assert paths.shape[0] == len(causal_X)
def test_from_forest(self, causal_X, causal_y, causal_w):
forest = GRFForestInstrumentalRegressor()
forest.fit(causal_X, causal_y, causal_w, causal_w)
tree = GRFTreeInstrumentalRegressor.from_forest(forest=forest, idx=0)
tree.predict(causal_X)
def test_get_depth(self, causal_X, causal_y, causal_w):
tree = GRFTreeInstrumentalRegressor()
tree.fit(causal_X, causal_y, causal_w, causal_w)
depth = tree.get_depth()
assert isinstance(depth, int)
assert depth > 0