def test_pretty_unicode_defaults():
    use_unicode = pprint_use_unicode(True)
    assert xpretty(Symbol('alpha')) == u'\u03b1'
    pprint_use_unicode(False)
    assert xpretty(Symbol('alpha')) == 'alpha'

    pprint_use_unicode(use_unicode)

def test_full_prec():
    assert xpretty(S("0.3"), full_prec=True) == "0.300000000000000"
    assert xpretty(S("0.3"), full_prec="auto") == "0.300000000000000"
    assert xpretty(S("0.3"), full_prec=False) == "0.3"
    assert xpretty(S("0.3") * x, full_prec=True, use_unicode=False) in ["0.300000000000000*x", "x*0.300000000000000"]
    assert xpretty(S("0.3") * x, full_prec="auto", use_unicode=False) in ["0.3*x", "x*0.3"]
    assert xpretty(S("0.3") * x, full_prec=False, use_unicode=False) in ["0.3*x", "x*0.3"]

def test_pretty_unicode():
    assert xpretty(oo, use_unicode=True) == u"\u221e"
    assert xpretty(pi, use_unicode=True) == u"\u03c0"
    assert xpretty(pi + 2 * x, use_unicode=True) in [u"\u03c0 + 2⋅x", u"2⋅x + \u03c0"]
    assert xpretty(pi ** 2 + exp(x), use_unicode=True) in [u" 2    x\n\u03c0  + \u212f ", u" x    2\n\u212f  + \u03c0 "]
    assert xpretty(Ne(x, y), use_unicode=True) == u"x \u2260 y"
    assert xpretty(gamma(x), use_unicode=True) == u"\u0393(x)"

def test_pretty_unicode():
    assert xpretty( oo, use_unicode=True ) == u'\u221e'
    assert xpretty( pi, use_unicode=True ) == u'\u03c0'
    assert xpretty( pi+2*x, use_unicode=True ) in [u'\u03c0 + 2⋅x', u'2⋅x + \u03c0']
    assert xpretty( pi**2+exp(x), use_unicode=True ) in [
            u' 2    x\n\u03c0  + \u212f ',
            u' x    2\n\u212f  + \u03c0 ']
    assert xpretty( Ne(x, y), use_unicode=True ) == u'x \u2260 y'
    assert xpretty( gamma(x), use_unicode=True ) == u'\u0393(x)'

def test_pretty_str():
    assert xpretty('a\nb') == 'a\nb'

def test_pretty_no_wrap_line():
    huge_expr = 0
    for i in range(20):
        huge_expr += i*sin(i+x)
    assert xpretty(huge_expr            ).find('\n') != -1
    assert xpretty(huge_expr, wrap_line=False).find('\n') == -1

def pretty(expr):
    # ascii-pretty by default
    return xpretty(expr, use_unicode=False)

def upretty(expr):
    """Unicode pretty-printing"""
    return xpretty(expr, use_unicode=True, wrap_line=False)

def pretty(expr):
    """ASCII pretty-printing"""
    return xpretty(expr, use_unicode=False, wrap_line=False)

def upretty(expr, order=None):
    """Unicode pretty-printing"""
    return xpretty(expr, order=order, use_unicode=True)

def pretty(expr, order=None):
    """ASCII pretty-printing"""
    return xpretty(expr, order=order, use_unicode=False)

def upretty(expr):
    """Unicode pretty-printing"""
    return xpretty(expr, use_unicode=True)

def pretty(expr):
    # ascii-pretty by default
    return xpretty(expr, False)

def pretty(expr, order=None):
    # ascii-pretty by default
    return xpretty(expr, order=order, use_unicode=False)