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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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