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