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97 lines
3.0 KiB
Python
97 lines
3.0 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for Graph validation and routing."""
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import logging
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from google.adk.workflow import Edge
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from google.adk.workflow import START
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from google.adk.workflow._graph import DEFAULT_ROUTE
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from google.adk.workflow._graph import Graph
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from .workflow_testing_utils import TestingNode
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def test_valid_graph() -> None:
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"""Tests that a valid graph passes validation."""
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node_a = TestingNode(name='NodeA')
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graph = Graph(
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edges=[
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Edge(from_node=START, to_node=node_a),
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],
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)
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graph.validate_graph() # Should not raise
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def test_get_next_pending_nodes() -> None:
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"""Tests that get_next_pending_nodes returns correct nodes based on routes."""
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node_a = TestingNode(name='NodeA')
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node_b = TestingNode(name='NodeB')
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node_c = TestingNode(name='NodeC')
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node_d = TestingNode(name='NodeD')
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graph = Graph(
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edges=[
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Edge(from_node=node_a, to_node=node_b), # Unconditional
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Edge(from_node=node_a, to_node=node_c, route='route1'), # Conditional
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Edge(
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from_node=node_a, to_node=node_d, route=DEFAULT_ROUTE
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), # Default
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],
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)
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# Test unconditional edge triggered
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next_nodes = graph.get_next_pending_nodes('NodeA', routes_to_match=None)
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assert set(next_nodes) == {'NodeB', 'NodeD'}
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# Test specific route matched
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next_nodes = graph.get_next_pending_nodes('NodeA', routes_to_match='route1')
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assert set(next_nodes) == {'NodeB', 'NodeC'}
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# Test unmatched route falls back to default
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next_nodes = graph.get_next_pending_nodes(
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'NodeA', routes_to_match='unknown_route'
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)
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assert set(next_nodes) == {'NodeB', 'NodeD'}
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# Test list of routes to match
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next_nodes = graph.get_next_pending_nodes(
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'NodeA', routes_to_match=['route1', 'unknown_route']
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)
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assert set(next_nodes) == {'NodeB', 'NodeC'}
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def test_get_next_pending_nodes_unmatched_route_warning(caplog) -> None:
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"""Tests that a warning is logged when a route is unmatched and there's no DEFAULT_ROUTE."""
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node_a = TestingNode(name='NodeA')
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node_c = TestingNode(name='NodeC')
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graph = Graph(
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edges=[
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Edge(from_node=node_a, to_node=node_c, route='route1'),
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],
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)
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with caplog.at_level(logging.WARNING):
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next_nodes = graph.get_next_pending_nodes(
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'NodeA', routes_to_match='unknown_route'
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)
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assert not next_nodes
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assert any(
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'has conditional/DEFAULT edges but none were matched' in record.message
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for record in caplog.records
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)
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