# -*- encoding: utf-8 -*-

class AppTestBuilders(object):
    spaceconfig = dict(usemodules=['__pypy__'])

    def test_simple(self):
        from __pypy__.builders import StringBuilder
        b = StringBuilder()
        b.append(u"abcä")
        b.append(u"123")
        b.append(u"1")
        s = b.build()
        assert s == u"abcä1231"
        assert b.build() == s
        b.append(u"123")
        assert b.build() == s + u"123"

    def test_preallocate(self):
        from __pypy__.builders import StringBuilder
        b = StringBuilder(10)
        b.append(u"abc")
        b.append(u"123")
        s = b.build()
        assert s == u"abc123"

    def test_append_slice(self):
        from __pypy__.builders import StringBuilder
        b = StringBuilder()
        b.append_slice(u"abcdefgh", 2, 5)
        raises(ValueError, b.append_slice, u"1", 2, 1)
        s = b.build()
        assert s == u"cde"
        b.append_slice(u"abc", 1, 2)
        assert b.build() == u"cdeb"
        b.append_slice(b'\xc3\xa4\xc4\x83\xc3\xa7'.decode("utf-8"), 1, 2)
        s = b.build()
        assert s.encode("utf-8") == b"cdeb\xc4\x83"

    def test_stringbuilder(self):
        from __pypy__.builders import BytesBuilder
        b = BytesBuilder()
        b.append(b"abc")
        b.append(b"123")
        assert len(b) == 6
        b.append(b"you and me")
        s = b.build()
        assert len(b) == 16
        assert s == b"abc123you and me"
        assert b.build() == s