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# -*- coding: utf-8 -*-
from sympy.core.relational import Eq
from sympy.core.symbol import Symbol
from sympy.functions.elementary.piecewise import Piecewise
from sympy.printing.preview import preview
from io import BytesIO
def test_preview():
x = Symbol('x')
obj = BytesIO()
try:
preview(x, output='png', viewer='BytesIO', outputbuffer=obj)
except RuntimeError:
pass # latex not installed on CI server
def test_preview_unicode_symbol():
# issue 9107
a = Symbol('α')
obj = BytesIO()
try:
preview(a, output='png', viewer='BytesIO', outputbuffer=obj)
except RuntimeError:
pass # latex not installed on CI server
def test_preview_latex_construct_in_expr():
# see PR 9801
x = Symbol('x')
pw = Piecewise((1, Eq(x, 0)), (0, True))
obj = BytesIO()
try:
preview(pw, output='png', viewer='BytesIO', outputbuffer=obj)
except RuntimeError:
pass # latex not installed on CI server
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