81 lines
2.0 KiB
Python
81 lines
2.0 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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""" Testing Expression """
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from pymath.calculus.expression import Expression
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from pymath.calculus.fraction import Fraction
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from pymath.calculus.generic import first_elem
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from pymath.calculus.render import txt, tex
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def test_init_from_str():
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exp = Expression("2 + 3")
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assert exp.postfix_tokens == [2, 3, "+"]
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def test_init_from_exp():
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pass
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def test_init_list():
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exp = Expression([2, 3, "+"])
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assert exp.postfix_tokens == [2, 3, "+"]
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def test_init_one_element_int_from_str():
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exp = Expression("1")
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def test_init_one_element_int_from_list():
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exp = Expression([1])
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#def test_init_one_element_str_from_str():
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# exp = Expression("x")
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#
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#def test_init_one_element_str_from_list():
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# exp = Expression(["x"])
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def test_simplify_exp():
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exp = Expression("1 + 2 * 3")
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simplified = exp.simplify()
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ans = Expression("7")
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assert ans == simplified
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#def test_simplify_frac():
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# exp = Expression("1/2 - 4")
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# simplified = exp.simplify()
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# ans = Expression("-7/2")
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# assert simplified == ans
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#
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#def test_explain_frac():
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# exp = Expression("1/2 - 4")
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# simplified = exp.simplify()
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#
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# steps = ['\\frac{ 1 }{ 2 } - 4', \
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# '\\frac{ 1 \\times 1 }{ 2 \\times 1 } - \\frac{ 4 \\times 2 }{ 1 \\times 2 }',\
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# '\\frac{ 1 }{ 2 } - \\frac{ 8 }{ 2 }',\
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# '\\frac{ 1 - 8 }{ 2 }',\
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# '\\frac{ -7 }{ 2 }']
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# assert simplified.steps == list(exp.simplify())
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def test_add_exp():
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e = Expression("12- 4")
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f = Expression("4 + 1")
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g = e + f
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assert g.postfix_tokens == [12, 4, '-', 4, 1, "+", "+"]
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def test_mul_exp():
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e = Expression("12- 4")
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f = Expression("4 + 1")
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g = e * f
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assert g.postfix_tokens == [12, 4, '-', 4, 1, "+", "*"]
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def test_neg_exp():
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e = Expression("12- 4")
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g = -e
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assert g.postfix_tokens == [12, 4, '-', '-']
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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