Method assertTrue

Lib/unittest/case.py:756–760

Check that the expression is true.

(self, expr, msg=None)

            raise self.failureException(msg)

    def assertTrue(self, expr, msg=None):
        """Check that the expression is true."""
        if not expr:
            msg = self._formatMessage(msg, "%s is not true" % safe_repr(expr))
            raise self.failureException(msg)

    def _formatMessage(self, msg, standardMsg):
        """Honour the longMessage attribute when generating failure messages.