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Delete ag4masses/alphageometry/geometry_test.py
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ag4masses/alphageometry/geometry_test.py
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# Copyright 2023 DeepMind Technologies Limited
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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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# ==============================================================================
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"""Unit tests for geometry.py."""
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import unittest
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from absl.testing import absltest
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import geometry as gm
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class GeometryTest(unittest.TestCase):
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def _setup_equality_example(self):
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# Create 4 nodes a, b, c, d
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# and their lengths
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a = gm.Segment('a')
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la = gm.Length('l(a)')
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a.connect_to(la)
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la.connect_to(a)
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b = gm.Segment('b')
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lb = gm.Length('l(b)')
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b.connect_to(lb)
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lb.connect_to(b)
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c = gm.Segment('c')
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lc = gm.Length('l(c)')
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c.connect_to(lc)
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lc.connect_to(c)
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d = gm.Segment('d')
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ld = gm.Length('l(d)')
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d.connect_to(ld)
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ld.connect_to(d)
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# Now let a=b, b=c, a=c, c=d
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la.merge([lb], 'fact1')
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lb.merge([lc], 'fact2')
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la.merge([lc], 'fact3')
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lc.merge([ld], 'fact4')
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return a, b, c, d, la, lb, lc, ld
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def test_merged_node_representative(self):
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_, _, _, _, la, lb, lc, ld = self._setup_equality_example()
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# all nodes are now represented by la.
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self.assertEqual(la.rep(), la)
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self.assertEqual(lb.rep(), la)
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self.assertEqual(lc.rep(), la)
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self.assertEqual(ld.rep(), la)
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def test_merged_node_equivalence(self):
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_, _, _, _, la, lb, lc, ld = self._setup_equality_example()
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# all la, lb, lc, ld are equivalent
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self.assertCountEqual(la.equivs(), [la, lb, lc, ld])
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self.assertCountEqual(lb.equivs(), [la, lb, lc, ld])
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self.assertCountEqual(lc.equivs(), [la, lb, lc, ld])
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self.assertCountEqual(ld.equivs(), [la, lb, lc, ld])
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def test_bfs_for_equality_transitivity(self):
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a, _, _, d, _, _, _, _ = self._setup_equality_example()
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# check that a==d because fact3 & fact4, not fact1 & fact2
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self.assertCountEqual(gm.why_equal(a, d), ['fact3', 'fact4'])
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if __name__ == '__main__':
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absltest.main()
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