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20 lines
634 B
Python
20 lines
634 B
Python
import re
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def get_first_line(output):
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match = re.search("^(.*)$", output, flags=re.MULTILINE)
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if match is None:
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return None
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else:
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return match.group(1)
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def assert_has_n_columns(output, n, sep='\t'):
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""" Asserts the tabular output contains n columns. The optional
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sep argument specifies the column seperator used to determine the
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number of columns."""
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n = int(n)
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first_line = get_first_line(output)
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assert first_line is not None, "Was expecting output with %d columns, but output was empty." % n
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assert len(first_line.split(sep)) == n, "Output does not have %d columns." % n
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