def test_simple():
rl = rewriterule(Basic(p, 1), Basic(p, 2), variables=(p,))
assert list(rl(Basic(3, 1))) == [Basic(3, 2)]
p1 = p**2
p2 = p**3
rl = rewriterule(p1, p2, variables=(p,))
expr = x**2
assert list(rl(expr)) == [x**3]
def test_simple():
rl = rewriterule(Basic(p, 1), Basic(p, 2), variables=(p, ))
assert list(rl(Basic(3, 1))) == [Basic(3, 2)]
p1 = p**2
p2 = p**3
rl = rewriterule(p1, p2, variables=(p, ))
expr = x**2
assert list(rl(expr)) == [x**3]
def test_moderate():
p1 = p**2 + q**3
p2 = (p * q)**4
rl = rewriterule(p1, p2, (p, q))
expr = x**2 + y**3
assert list(rl(expr)) == [(x * y)**4]
def test_sincos():
p1 = sin(p)**2 + sin(p)**2
p2 = 1
rl = rewriterule(p1, p2, (p, q))
assert list(rl(sin(x)**2 + sin(x)**2)) == [1]
assert list(rl(sin(y)**2 + sin(y)**2)) == [1]
def test_moderate():
p1 = p**2 + q**3
p2 = (p*q)**4
rl = rewriterule(p1, p2, (p, q))
expr = x**2 + y**3
assert list(rl(expr)) == [(x*y)**4]
def test_sincos():
p1 = sin(p)**2 + sin(p)**2
p2 = 1
rl = rewriterule(p1, p2, (p, q))
assert list(rl(sin(x)**2 + sin(x)**2)) == [1]
assert list(rl(sin(y)**2 + sin(y)**2)) == [1]
def test_simple():
p1 = p**2
p2 = p**3
rl = rewriterule(p1, p2)
expr = x**2
assert list(rl(expr)) == [x**3]
def test_simple():
p1 = p ** 2
p2 = p ** 3
rl = rewriterule(p1, p2)
expr = x ** 2
assert list(rl(expr)) == [x ** 3]
def test_condition_multiple():
rl = rewriterule(x + y, x**y, [x, y], lambda x, y: x.is_integer)
a = Symbol('a')
b = Symbol('b', integer=True)
expr = a + b
assert list(rl(expr)) == [b**a]
c = Symbol('c', integer=True)
d = Symbol('d', integer=True)
assert set(rl(c + d)) == set([c**d, d**c])
def test_condition_multiple():
rl = rewriterule(x + y, x**y, [x, y], lambda x, y: x.is_integer)
a = Symbol("a")
b = Symbol("b", integer=True)
expr = a + b
assert list(rl(expr)) == [b**a]
c = Symbol("c", integer=True)
d = Symbol("d", integer=True)
assert set(rl(c + d)) == {c**d, d**c}
def test_condition_multiple():
rl = rewriterule(x + y, x**y, [x,y], lambda x, y: x.is_integer)
a = Symbol('a')
b = Symbol('b', integer=True)
expr = a + b
assert list(rl(expr)) == [b**a]
c = Symbol('c', integer=True)
d = Symbol('d', integer=True)
assert set(rl(c + d)) == set([c**d, d**c])
def test_condition_simple():
rl = rewriterule(x, x + 1, [x], lambda x: x < 10)
assert not list(rl(S(15)))
assert rebuild(next(rl(S(5)))) == 6
def test_Exprs_ok():
rl = rewriterule(p + q, q + p, (p, q))
next(rl(x + y)).is_commutative
str(next(rl(x + y)))
def test_simple_variables():
rl = rewriterule(Basic(x, 1), Basic(x, 2), variables=(x,))
assert list(rl(Basic(3, 1))) == [Basic(3, 2)]
rl = rewriterule(x**2, x**3, variables=(x,))
assert list(rl(y**2)) == [y**3]
def test_Exprs_ok():
rl = rewriterule(p+q, q+p, (p, q))
next(rl(x+y)).is_commutative
str(next(rl(x+y)))
def test_simple_variables():
rl = rewriterule(Basic(x, 1), Basic(x, 2), variables=(x, ))
assert list(rl(Basic(3, 1))) == [Basic(3, 2)]
rl = rewriterule(x**2, x**3, variables=(x, ))
assert list(rl(y**2)) == [y**3]
def test_condition_simple():
rl = rewriterule(x, x+1, [x], lambda x: x < 10)
assert not list(rl(S(15)))
assert rebuild(next(rl(S(5)))) == 6
def test_assumptions():
rl = rewriterule(x + y, x**y, [x, y], assume=Q.integer(x))
a, b = map(Symbol, 'ab')
expr = a + b
assert list(rl(expr, Q.integer(b))) == [b**a]
def test_assumptions():
rl = rewriterule(x + y, x**y, [x, y], assume=Q.integer(x))
a, b = map(Symbol, 'ab')
expr = a + b
assert list(rl(expr, Q.integer(b))) == [b**a]
def test_simple_variables():
rl = rewriterule(Basic(x, S(1)), Basic(x, S(2)), variables=(x,))
assert list(rl(Basic(S(3), S(1)))) == [Basic(S(3), S(2))]
rl = rewriterule(x**2, x**3, variables=(x,))
assert list(rl(y**2)) == [y**3]