| def test_finalization(): |
| g = new_graph() |
| k1 = g.key('t1', 'id1') |
| k2 = g.key('t1', 'id2') |
| k3 = g.key('t1', 'id3') |
| |
| # Before the finalization the graph can be modified. |
| g.add_node(k1) |
| g.add_node(k2) |
| g.add_edge(k1, k2) |
| |
| # But not queried. |
| assert.fails(lambda: g.node(k1), 'cannot query a graph under construction') |
| assert.fails(lambda: g.children(k1), 'cannot query a graph under construction') |
| assert.fails(lambda: g.descendants(k1), 'cannot query a graph under construction') |
| |
| # Can be finalized. Refinalizing is noop. |
| assert.eq(g.finalize(), []) |
| assert.eq(g.finalize(), []) |
| |
| # The graph is no longer mutable. |
| assert.fails(lambda: g.add_node(k3), 'cannot modify a finalized graph') |
| assert.fails(lambda: g.add_edge(k1, k3), 'cannot modify a finalized graph') |
| |
| # But is it queryable now. |
| assert.true(g.node(k1) != None) |
| assert.eq(g.children(k1), [g.node(k2)]) |
| assert.eq(g.descendants(k1), [g.node(k1), g.node(k2)]) |
| |
| test_finalization() |
