Adding all project files

venv/Lib/site-packages/sympy/strategies/tests/test_tree.py

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+from sympy.strategies.tree import treeapply, greedy, allresults, brute
+from functools import partial, reduce
+
+
+def inc(x):
+    return x + 1
+
+
+def dec(x):
+    return x - 1
+
+
+def double(x):
+    return 2 * x
+
+
+def square(x):
+    return x**2
+
+
+def add(*args):
+    return sum(args)
+
+
+def mul(*args):
+    return reduce(lambda a, b: a * b, args, 1)
+
+
+def test_treeapply():
+    tree = ([3, 3], [4, 1], 2)
+    assert treeapply(tree, {list: min, tuple: max}) == 3
+    assert treeapply(tree, {list: add, tuple: mul}) == 60
+
+
+def test_treeapply_leaf():
+    assert treeapply(3, {}, leaf=lambda x: x**2) == 9
+    tree = ([3, 3], [4, 1], 2)
+    treep1 = ([4, 4], [5, 2], 3)
+    assert treeapply(tree, {list: min, tuple: max}, leaf=lambda x: x + 1) == \
+           treeapply(treep1, {list: min, tuple: max})
+
+
+def test_treeapply_strategies():
+    from sympy.strategies import chain, minimize
+    join = {list: chain, tuple: minimize}
+
+    assert treeapply(inc, join) == inc
+    assert treeapply((inc, dec), join)(5) == minimize(inc, dec)(5)
+    assert treeapply([inc, dec], join)(5) == chain(inc, dec)(5)
+    tree = (inc, [dec, double])  # either inc or dec-then-double
+    assert treeapply(tree, join)(5) == 6
+    assert treeapply(tree, join)(1) == 0
+
+    maximize = partial(minimize, objective=lambda x: -x)
+    join = {list: chain, tuple: maximize}
+    fn = treeapply(tree, join)
+    assert fn(4) == 6  # highest value comes from the dec then double
+    assert fn(1) == 2  # highest value comes from the inc
+
+
+def test_greedy():
+    tree = [inc, (dec, double)]  # either inc or dec-then-double
+
+    fn = greedy(tree, objective=lambda x: -x)
+    assert fn(4) == 6  # highest value comes from the dec then double
+    assert fn(1) == 2  # highest value comes from the inc
+
+    tree = [inc, dec, [inc, dec, [(inc, inc), (dec, dec)]]]
+    lowest = greedy(tree)
+    assert lowest(10) == 8
+
+    highest = greedy(tree, objective=lambda x: -x)
+    assert highest(10) == 12
+
+
+def test_allresults():
+    # square = lambda x: x**2
+
+    assert set(allresults(inc)(3)) == {inc(3)}
+    assert set(allresults([inc, dec])(3)) == {2, 4}
+    assert set(allresults((inc, dec))(3)) == {3}
+    assert set(allresults([inc, (dec, double)])(4)) == {5, 6}
+
+
+def test_brute():
+    tree = ([inc, dec], square)
+    fn = brute(tree, lambda x: -x)
+
+    assert fn(2) == (2 + 1)**2
+    assert fn(-2) == (-2 - 1)**2
+
+    assert brute(inc)(1) == 2