Method assertStartsWith

Lib/test/support/testcase.py:39–43

(self, s, prefix, msg=None)

            self.fail(self._formatMessage(msg, standardMsg))

    def assertStartsWith(self, s, prefix, msg=None):
        if s.startswith(prefix):
            return
        standardMsg = f"{s!r} doesn't start with {prefix!r}"
        self.fail(self._formatMessage(msg, standardMsg))

    def assertNotStartsWith(self, s, prefix, msg=None):
        if not s.startswith(prefix):