old_contents: from latex import build_pdf
  from latex.exc import LatexBuildError
  
  import pytest
  
  
  def test_generates_something():
      min_latex = r"""
  \documentclass{article}
  \begin{document}
  Hello, world!
  \end{document}
  """
  
      pdf = build_pdf(min_latex)
  
      assert pdf
  
  
  def test_raises_correct_exception_on_fail():
      broken_latex = r"""foo"""
  
      with pytest.raises(LatexBuildError):
          build_pdf(broken_latex)
  
new_contents: from latex import build_pdf, LatexBuildError
  from latex.errors import parse_log
  
  import pytest
  
  
  def test_generates_something():
      min_latex = r"""
  \documentclass{article}
  \begin{document}
  Hello, world!
  \end{document}
  """
  
      pdf = build_pdf(min_latex)
  
      assert pdf
  
  
  def test_raises_correct_exception_on_fail():
      broken_latex = r"""foo"""
  
      with pytest.raises(LatexBuildError):
          build_pdf(broken_latex)
  
  
  def test_finds_errors_correctly():
      broken_latex = r"""
  \documentclass{article}
  \begin{document}
  All good
  \undefinedcontrolsequencehere
  \end{document}
  """
  
      try:
          build_pdf(broken_latex)
      except LatexBuildError as e:
          assert parse_log(e.log) == e.get_errors()
      else:
          assert False, 'no exception raised'
  
subject: Test get_errors() method of LatexBuildError.