Fix incorrect validation error for animate args info array (plotly#1267)

* Added failing test cases
* Only perform 2D validation if 2D array is allowed

_plotly_utils/basevalidators.py

@@ -1808,32 +1808,29 @@ def validate_coerce(self, v):
 
         is_v_2d = v and is_array(v[0])
 
-        if is_v_2d:
-            if self.dimensions == 1:
-                self.raise_invalid_val(orig_v)
-            else:  # self.dimensions is '1-2' or 2
-                if is_array(self.items):
-                    # e.g. 2D list as parcoords.dimensions.constraintrange
-                    # check that all items are there for each nested element
-                    for i, row in enumerate(v):
-                        # Check row length
-                        if not is_array(row) or len(row) != len(self.items):
-                            self.raise_invalid_val(orig_v[i], [i])
-
-                        for j, validator in enumerate(self.item_validators):
-                            row[j] = self.validate_element_with_indexed_name(
-                                v[i][j], validator, [i, j])
-                else:
-                    # e.g. 2D list as layout.grid.subplots
-                    # check that all elements match individual validator
-                    validator = self.item_validators[0]
-                    for i, row in enumerate(v):
-                        if not is_array(row):
-                            self.raise_invalid_val(orig_v[i], [i])
-
-                        for j, el in enumerate(row):
-                            row[j] = self.validate_element_with_indexed_name(
-                                el, validator, [i, j])
+        if is_v_2d and self.dimensions in ('1-2', 2):
+            if is_array(self.items):
+                # e.g. 2D list as parcoords.dimensions.constraintrange
+                # check that all items are there for each nested element
+                for i, row in enumerate(v):
+                    # Check row length
+                    if not is_array(row) or len(row) != len(self.items):
+                        self.raise_invalid_val(orig_v[i], [i])
+
+                    for j, validator in enumerate(self.item_validators):
+                        row[j] = self.validate_element_with_indexed_name(
+                            v[i][j], validator, [i, j])
+            else:
+                # e.g. 2D list as layout.grid.subplots
+                # check that all elements match individual validator
+                validator = self.item_validators[0]
+                for i, row in enumerate(v):
+                    if not is_array(row):
+                        self.raise_invalid_val(orig_v[i], [i])
+
+                    for j, el in enumerate(row):
+                        row[j] = self.validate_element_with_indexed_name(
+                            el, validator, [i, j])
         elif v and self.dimensions == 2:
             # e.g. 1D list passed as layout.grid.subplots
             self.raise_invalid_val(orig_v[0], [0])

_plotly_utils/tests/validators/test_infoarray_validator.py

@@ -26,6 +26,14 @@ def validator_number3_free():
         {'valType': 'number', 'min': 0, 'max': 1}], free_length=True)
 
 
+@pytest.fixture()
+def validator_any3_free():
+    return InfoArrayValidator('prop', 'parent', items=[
+        {'valType': 'any'},
+        {'valType': 'any'},
+        {'valType': 'any'}], free_length=True)
+
+
 @pytest.fixture()
 def validator_number2_2d():
     return InfoArrayValidator('prop', 'parent', items=[
@@ -219,6 +227,27 @@ def test_validator_rejection_number3_free_element_value(val, first_invalid_ind,
                     first_invalid_ind=first_invalid_ind)) in str(validation_failure.value)
 
 
+# Any3 Tests (free_length=True)
+# --------------------------------
+# ### Acceptance ###
+@pytest.mark.parametrize('val', [
+    [1, 0, 'Hello'],
+    (False, 0.99),
+    np.array([0.1, 0.99]),
+    [0], [],
+    [['a', 'list']],
+    [['a', 'list'], 0],
+    [0, ['a', 'list'], 1],
+])
+def test_validator_acceptance_any3_free(val, validator_any3_free):
+    coerce_val = validator_any3_free.validate_coerce(val)
+    assert coerce_val == list(val)
+
+    # Compute expected
+    expected = tuple(tuple(el) if isinstance(el, list) else el for el in val)
+    assert validator_any3_free.present(coerce_val) == expected
+
+
 # Number2 2D
 # ----------
 # ### Acceptance ###