from guppy.heapy.test import support


class FirstCase(support.TestCase):
    def setUp(self):
        support.TestCase.setUp(self)
        self.OH = self.heapy.OutputHandling

    def test_1(self):
        class T:
            def __init__(self, test, numlines, get_num_lines=None, get_more_msg=None):
                mod = test.OH

                def get_line_iter():
                    for i in range(numlines):
                        yield '%d' % i

                self.mod = mod
                self.more = mod.more_printer(
                    self,
                    get_line_iter=get_line_iter,
                    max_top_lines=4,
                    max_more_lines=3,
                    get_num_lines=get_num_lines,
                    get_more_msg=get_more_msg)

            def __str__(self):
                return self.more._oh_printer.get_str_of_top()

        self.aseq(str(T(self, 4)), '0\n1\n2\n3')

        t = T(self, 6, lambda: 6)

        self.aseq(
            str(t), "0\n1\n2\n3\n<Lines 0..3 of 6. Type e.g. '_.more' for more.>")
        x = t.more
        self.aseq(str(x), '4\n5')
        self.aseq(
            str(x.top), "0\n1\n2\n3\n<Lines 0..3 of 6. Type e.g. '_.more' for more.>")

        t = T(self, 6, get_more_msg=lambda f, t: '<%d more rows>' % (6-t))
        self.aseq(str(t), '0\n1\n2\n3\n<3 more rows>')


def test_main(debug=0):
    support.run_unittest(FirstCase, debug)


if __name__ == "__main__":
    test_main()
