import sys
import unittest
from curtsies.formatstring import (
    FmtStr,
    fmtstr,
    Chunk,
    linesplit,
    normalize_slice,
    width_aware_slice,
)
from curtsies.fmtfuncs import (
    blue,
    red,
    green,
    on_blue,
    on_red,
    on_green,
    underline,
    blink,
    bold,
)
from curtsies.termformatconstants import FG_COLORS
from curtsies.formatstringarray import fsarray, FSArray, simple_format

from unittest import skip


def repr_without_leading_u(s: str) -> str:
    assert isinstance(s, str)
    return repr(s)


class TestFmtStrInitialization(unittest.TestCase):
    def test_bad(self) -> None:
        # Can't specify fg or bg color two ways
        self.assertRaises(ValueError, fmtstr, "hello", "blue", {"fg": 30})
        self.assertRaises(ValueError, fmtstr, "hello", "on_blue", {"bg": 40})
        # Only specific fg and bg colors are allowed
        self.assertRaises(ValueError, fmtstr, "hello", {"bg": 30})
        self.assertRaises(ValueError, fmtstr, "hello", {"fg": 40})
        # Only existing xforms can be used in kwargs
        self.assertRaises(ValueError, fmtstr, "hello", "make it big")

    def test_actual_init(self) -> None:
        FmtStr()


class TestFmtStrParsing(unittest.TestCase):
    def test_no_escapes(self) -> None:
        self.assertEqual(str(fmtstr("abc")), "abc")

    def test_simple_escapes(self) -> None:
        self.assertEqual(str(fmtstr("\x1b[33mhello\x1b[0m")), "\x1b[33mhello\x1b[39m")
        self.assertEqual(str(fmtstr("\x1b[33mhello\x1b[39m")), "\x1b[33mhello\x1b[39m")
        self.assertEqual(str(fmtstr("\x1b[33mhello")), "\x1b[33mhello\x1b[39m")
        self.assertEqual(str(fmtstr("\x1b[43mhello\x1b[49m")), "\x1b[43mhello\x1b[49m")
        self.assertEqual(str(fmtstr("\x1b[43mhello\x1b[0m")), "\x1b[43mhello\x1b[49m")
        self.assertEqual(str(fmtstr("\x1b[43mhello")), "\x1b[43mhello\x1b[49m")
        self.assertEqual(
            str(fmtstr("\x1b[32;1mhello")), "\x1b[32m\x1b[1mhello\x1b[0m\x1b[39m"
        )
        self.assertEqual(str(fmtstr("\x1b[2mhello")), "\x1b[2mhello\x1b[0m")
        self.assertEqual(
            str(fmtstr("\x1b[32;2mhello")), "\x1b[32m\x1b[2mhello\x1b[0m\x1b[39m"
        )
        self.assertEqual(
            str(fmtstr("\x1b[33m\x1b[43mhello\x1b[0m")),
            "\x1b[33m\x1b[43mhello\x1b[49m\x1b[39m",
        )

    def test_out_of_order(self) -> None:
        self.assertEqual(
            str(fmtstr("\x1b[33m\x1b[43mhello\x1b[39m\x1b[49m")),
            "\x1b[33m\x1b[43mhello\x1b[49m\x1b[39m",
        )

    def test_noncurtsies_output(self) -> None:
        fmtstr("\x1b[35mx\x1b[m")
        self.assertEqual(fmtstr("\x1b[Ahello"), "hello")
        self.assertEqual(fmtstr("\x1b[20Ahello"), "hello")
        self.assertEqual(fmtstr("\x1b[20mhello"), "hello")


class TestImmutability(unittest.TestCase):
    def test_fmt_strings_remain_unchanged_when_used_to_construct_other_ones(
        self,
    ) -> None:
        a = fmtstr("hi", "blue")
        b = fmtstr("there", "red")
        c = a + b
        green(c)
        self.assertEqual(a.shared_atts["fg"], FG_COLORS["blue"])
        self.assertEqual(b.shared_atts["fg"], FG_COLORS["red"])

    def test_immutibility_of_FmtStr(self) -> None:
        a = fmtstr("hi", "blue")
        b = green(a)
        self.assertEqual(a.shared_atts["fg"], FG_COLORS["blue"])
        self.assertEqual(b.shared_atts["fg"], FG_COLORS["green"])


class TestFmtStrSplice(unittest.TestCase):
    def test_simple_beginning_splice(self) -> None:
        self.assertEqual(fmtstr("abc").splice("d", 0), fmtstr("dabc"))
        self.assertEqual(fmtstr("abc").splice("d", 0), "d" + fmtstr("abc"))

    def test_various_splices(self) -> None:
        a = blue("hi")
        b = a + green("bye")
        c = b + red("!")
        self.assertEqual(
            c.splice("asdfg", 1),
            blue("h") + "asdfg" + blue("i") + green("bye") + red("!"),
        )
        self.assertEqual(
            c.splice("asdfg", 1, 4), blue("h") + "asdfg" + green("e") + red("!")
        )
        self.assertEqual(c.splice("asdfg", 1, 5), blue("h") + "asdfg" + red("!"))

    def test_splice_of_empty_fmtstr(self) -> None:
        self.assertEqual(fmtstr("ab").splice("", 1), fmtstr("ab"))

    def test_splice_with_multiple_chunks(self) -> None:
        a = fmtstr("notion")
        b = a.splice("te", 2, 6)
        c = b.splice("de", 0)

        self.assertEqual(a.s, "notion")
        self.assertEqual(b.s, "note")
        self.assertEqual(c.s, "denote")
        self.assertEqual(len(c.chunks), 3)

    def test_splice_fmtstr_with_end_without_atts(self) -> None:
        a = fmtstr("notion")
        b = a.splice("te", 2, 6)

        self.assertEqual(a.s, "notion")
        self.assertEqual(b.s, "note")
        self.assertEqual(len(b.chunks), 2)

    def test_splice_fmtstr_with_end_with_atts(self) -> None:
        # Need to test with fmtstr consisting of multiple chunks
        # and with attributes
        a = fmtstr("notion", "blue")
        b = a.splice("te", 2, 6)

        self.assertEqual(a.s, "notion")
        self.assertEqual(a.chunks[0].atts, {"fg": 34})
        self.assertEqual(len(a.chunks), 1)

        self.assertEqual(b.s, "note")
        self.assertEqual(b.chunks[0].atts, {"fg": 34})
        self.assertEqual(b.chunks[1].atts, {})
        self.assertEqual(len(b.chunks), 2)

    def test_splice_fmtstr_without_end(self) -> None:
        a = fmtstr("notion")
        b = a.splice(fmtstr("ta"), 2)
        self.assertEqual(a.s, "notion")
        self.assertEqual(b.s, "notation")
        self.assertEqual(len(b.chunks), 3)

    def test_splice_string_without_end(self) -> None:
        a = fmtstr("notion")
        b = a.splice("ta", 2)
        self.assertEqual(a.s, "notion")
        self.assertEqual(b.s, "notation")
        self.assertEqual(len(b.chunks), 3)

    def test_multiple_bfs_splice(self) -> None:
        self.assertEqual(
            fmtstr("a") + blue("b"),
            on_blue(" " * 2).splice(fmtstr("a") + blue("b"), 0, 2),
        )
        self.assertEqual(
            on_red("yo") + on_blue("   "), on_blue(" " * 5).splice(on_red("yo"), 0, 2)
        )
        self.assertEqual(
            " " + on_red("yo") + on_blue("   "),
            on_blue(" " * 6).splice(" " + on_red("yo"), 0, 3),
        )
        self.assertEqual(
            on_blue("hey") + " " + on_red("yo") + on_blue("   "),
            on_blue(" " * 9).splice(on_blue("hey") + " " + on_red("yo"), 0, 6),
        )
        self.assertEqual(
            on_blue(" " * 5) + on_blue("hey") + " " + on_red("yo") + on_blue("   "),
            on_blue(" " * 14).splice(on_blue("hey") + " " + on_red("yo"), 5, 11),
        )


class TestFmtStr(unittest.TestCase):
    def test_copy_with_new_atts(self) -> None:
        a = fmtstr("hello")
        b = a.copy_with_new_atts(bold=True)
        self.assertEqual(a.shared_atts, {})
        self.assertEqual(b.shared_atts, {"bold": True})

    def test_copy_with_new_str(self) -> None:
        # Change string but not attributes
        a = fmtstr("hello", "blue")
        b = a.copy_with_new_str("bye")
        self.assertEqual(a.s, "hello")
        self.assertEqual(b.s, "bye")
        self.assertEqual(a.chunks[0].atts, b.chunks[0].atts)

    def test_append_without_atts(self) -> None:
        a = fmtstr("no")
        b = a.append("te")
        self.assertEqual(a.s, "no")
        self.assertEqual(b.s, "note")
        self.assertEqual(len(b.chunks), 2)

    def test_shared_atts(self) -> None:
        a = fmtstr("hi", "blue")
        b = fmtstr("there", "blue")
        c = a + b
        self.assertTrue("fg" in a.shared_atts)
        self.assertTrue("fg" in c.shared_atts)

    def test_new_with_atts_removed(self) -> None:
        a = fmtstr("hi", "blue", "on_green")
        b = fmtstr("there", "blue", "on_red")
        c = a + b
        self.assertEqual(
            c.new_with_atts_removed("fg"), on_green("hi") + on_red("there")
        )

    def setUp(self) -> None:
        self.s = fmtstr("hello!", "on_blue", fg="red")

    def test_length(self) -> None:
        self.assertEqual(len(self.s), len(self.s.s))

    def test_split(self) -> None:
        self.assertEqual(blue("hello there").split(" "), [blue("hello"), blue("there")])
        s = blue("hello there")
        self.assertEqual(s.split(" "), [s[:5], s[6:]])

        # split shouldn't create fmtstrs without chunks
        self.assertEqual(fmtstr("a").split("a")[0].chunks, fmtstr("").chunks)
        self.assertEqual(fmtstr("a").split("a")[1].chunks, fmtstr("").chunks)

        self.assertEqual(
            (fmtstr("imp") + " ").split("i"), [fmtstr(""), fmtstr("mp") + " "]
        )
        self.assertEqual(blue("abcbd").split("b"), [blue("a"), blue("c"), blue("d")])

    def test_split_with_spaces(self) -> None:
        self.assertEqual(blue("a\nb").split(), [blue("a"), blue("b")])
        self.assertEqual(blue("a   \t\n\nb").split(), [blue("a"), blue("b")])
        self.assertEqual(
            blue("hello   \t\n\nthere").split(), [blue("hello"), blue("there")]
        )

    def test_ljust_rjust(self) -> None:
        b = fmtstr("ab", "blue", "on_red", "bold")
        g = fmtstr("cd", "green", "on_red", "bold")
        s = b + g
        self.assertEqual(s.ljust(6), b + g + on_red("  "))
        self.assertEqual(s.rjust(6), on_red("  ") + b + g)

        # doesn't add empties to end
        self.assertEqual(s.ljust(4), b + g)
        self.assertEqual(s.rjust(4), b + g)

        # behavior if background different
        s = on_blue("a") + on_green("b")
        self.assertEqual(s.ljust(3), fmtstr("ab "))
        self.assertEqual(s.rjust(3), fmtstr(" ab"))
        s = blue(on_blue("a")) + green(on_green("b"))
        self.assertEqual(s.ljust(3), blue("a") + green("b") + fmtstr(" "))
        self.assertEqual(s.rjust(3), fmtstr(" ") + blue("a") + green("b"))

        # using fillchar
        self.assertEqual(s.ljust(3, "*"), fmtstr("ab*"))
        self.assertEqual(s.rjust(3, "*"), fmtstr("*ab"))

        # TODO:  (not tested or implemented)
        # formatted string passed in
        # preserve some non-uniform styles (bold, dark, blink) but not others (underline, invert)

    def test_linessplit(self) -> None:
        text = blue("the sum of the squares of the sideways")
        result = [
            blue("the") + blue(" ") + blue("sum"),
            blue("of") + blue(" ") + blue("the"),
            blue("squares"),
            blue("of") + blue(" ") + blue("the"),
            blue("sideway"),
            blue("s"),
        ]
        self.assertEqual(linesplit(text, 7), result)

    def test_mul(self) -> None:
        self.assertEqual(fmtstr("heyhey"), fmtstr("hey") * 2)
        pass
        # TODO raise common attributes when doing equality or when
        # doing multiplication, addition etc. to make these pass
        # self.assertEqual(blue('hellohellohello'), blue('hello')*3)
        # self.assertEqual(
        #        bold(blue('hey')+green('there')+blue('hey')+green('there')),
        #        bold(blue('hey')+green('there'))*2)

    def test_change_color(self) -> None:
        a = blue(red("hello"))
        self.assertEqual(a, blue("hello"))

    def test_repr(self) -> None:
        self.assertEqual(fmtstr("hello", "red", bold=False), red("hello"))
        self.assertEqual(fmtstr("hello", "red", bold=True), bold(red("hello")))


class TestDoubleUnders(unittest.TestCase):
    def test_equality(self) -> None:
        x = fmtstr("adfs")
        self.assertEqual(x, x)
        self.assertTrue(fmtstr("adfs"), fmtstr("adfs"))
        self.assertTrue(fmtstr("adfs", "blue"), fmtstr("adfs", fg="blue"))


class TestConvenience(unittest.TestCase):
    def test_fg(self) -> None:
        red("asdf")
        blue("asdf")
        self.assertTrue(True)

    def test_bg(self) -> None:
        on_red("asdf")
        on_blue("asdf")
        self.assertTrue(True)

    def test_styles(self) -> None:
        underline("asdf")
        blink("asdf")
        self.assertTrue(True)


class TestSlicing(unittest.TestCase):
    def test_index(self) -> None:
        self.assertEqual(fmtstr("Hi!", "blue")[0], fmtstr("H", "blue"))
        self.assertRaises(IndexError, fmtstr("Hi!", "blue").__getitem__, 5)

    def test_slice(self) -> None:
        self.assertEqual(fmtstr("Hi!", "blue")[1:2], fmtstr("i", "blue"))
        self.assertEqual(fmtstr("Hi!", "blue")[1:], fmtstr("i!", "blue"))
        s = fmtstr("imp") + " "
        self.assertEqual(s[1:], fmtstr("mp") + " ")
        self.assertEqual(blue("a\nb")[0:1], blue("a"))

        # considering changing behavior so that this doesn't work
        # self.assertEqual(fmtstr('Hi!', 'blue')[15:18], fmtstr('', 'blue'))


class TestComposition(unittest.TestCase):
    def test_simple_composition(self) -> None:
        a = fmtstr("hello ", "underline", "on_blue")
        b = fmtstr("there", "red", "on_blue")
        c = a + b
        fmtstr(c, bg="red")
        self.assertTrue(True)


class TestUnicode(unittest.TestCase):
    def test_output_type(self) -> None:
        self.assertEqual(type(str(fmtstr("hello", "blue"))), str)

    def test_normal_chars(self) -> None:
        fmtstr("a", "blue")
        str(fmtstr("a", "blue"))
        self.assertTrue(True)

    def test_funny_chars(self) -> None:
        fmtstr("⁇", "blue")
        str(Chunk("⁇", {"fg": "blue"}))
        str(fmtstr("⁇", "blue"))
        self.assertTrue(True)

    def test_right_sequence_in_py3(self) -> None:
        red_on_blue = fmtstr("hello", "red", "on_blue")
        blue_on_red = fmtstr("there", fg="blue", bg="red")
        green_s = fmtstr("!", "green")
        full = red_on_blue + " " + blue_on_red + green_s
        self.assertEqual(
            full, on_blue(red("hello")) + " " + on_red(blue("there")) + green("!")
        )
        self.assertEqual(
            str(full),
            "\x1b[31m\x1b[44mhello\x1b[49m\x1b[39m \x1b[34m\x1b[41mthere\x1b[49m\x1b[39m\x1b[32m!\x1b[39m",
        )

    def test_len_of_unicode(self) -> None:
        self.assertEqual(len(fmtstr("┌─")), 2)
        lines = ["┌─", "an", "┌─"]
        r = fsarray(lines)
        self.assertEqual(r.shape, (3, 2))
        self.assertEqual(len(fmtstr(fmtstr("┌─"))), len(fmtstr("┌─")))
        self.assertEqual(fmtstr(fmtstr("┌─")), fmtstr("┌─"))
        # TODO should we make this one work?
        # always coerce everything to unicode?
        # self.assertEqual(len(fmtstr('┌─')), 2)

    def test_len_of_unicode_in_fsarray(self) -> None:

        fsa = FSArray(3, 2)
        fsa.rows[0] = fsa.rows[0].setslice_with_length(0, 2, "┌─", 2)
        self.assertEqual(fsa.shape, (3, 2))
        fsa.rows[0] = fsa.rows[0].setslice_with_length(0, 2, fmtstr("┌─", "blue"), 2)
        self.assertEqual(fsa.shape, (3, 2))

    def test_add_unicode_to_byte(self) -> None:
        fmtstr("┌") + fmtstr("a")
        fmtstr("a") + fmtstr("┌")
        "┌" + fmtstr("┌")
        "┌" + fmtstr("a")
        fmtstr("┌") + "┌"
        fmtstr("a") + "┌"

    def test_unicode_slicing(self) -> None:
        self.assertEqual(fmtstr("┌adfs", "blue")[:2], fmtstr("┌a", "blue"))
        self.assertEqual(
            type(fmtstr("┌adfs", "blue")[:2].s), type(fmtstr("┌a", "blue").s)
        )
        self.assertEqual(len(fmtstr("┌adfs", "blue")[:2]), 2)

    def test_unicode_repr(self) -> None:
        repr(Chunk("–"))
        self.assertEqual(repr(fmtstr("–")), repr_without_leading_u("–"))


class TestCharacterWidth(unittest.TestCase):
    def test_doublewide_width(self) -> None:
        self.assertEqual(len(fmtstr("Ｅ", "blue")), 1)
        self.assertEqual(fmtstr("Ｅ", "blue").width, 2)
        self.assertEqual(len(fmtstr("ｈｉ")), 2)
        self.assertEqual(fmtstr("ｈｉ").width, 4)

    def test_multi_width(self) -> None:
        self.assertEqual(len(fmtstr("a\u0300")), 2)
        self.assertEqual(fmtstr("a\u0300").width, 1)

    def test_width_aware_slice(self) -> None:
        self.assertEqual(fmtstr("Ｅ").width_aware_slice(slice(None, 1, None)).s, " ")
        self.assertEqual(fmtstr("Ｅ").width_aware_slice(slice(None, 2, None)).s, "Ｅ")
        self.assertEqual(
            fmtstr("HＥ!", "blue").width_aware_slice(slice(1, 2, None)),
            fmtstr(" ", "blue"),
        )
        self.assertEqual(
            fmtstr("HＥ!", "blue").width_aware_slice(slice(1, 3, None)),
            fmtstr("Ｅ", "blue"),
        )

    def test_width_aware_splitlines(self) -> None:
        s = fmtstr("abcd")
        self.assertEqual(
            list(s.width_aware_splitlines(2)), [fmtstr("ab"), fmtstr("cd")]
        )

        s = fmtstr("HＥ!")
        self.assertEqual(
            list(s.width_aware_splitlines(2)), [fmtstr("H "), fmtstr("Ｅ"), fmtstr("!")]
        )

        s = fmtstr("He\u0300llo")
        self.assertEqual(
            list(s.width_aware_splitlines(2)),
            [fmtstr("He\u0300"), fmtstr("ll"), fmtstr("o")],
        )

        with self.assertRaises(ValueError):
            s.width_aware_splitlines(1)

    def test_width_at_offset(self) -> None:
        self.assertEqual(fmtstr("abＥcdef").width_at_offset(0), 0)
        self.assertEqual(fmtstr("abＥcdef").width_at_offset(2), 2)
        self.assertEqual(fmtstr("abＥcdef").width_at_offset(3), 4)
        self.assertEqual(fmtstr("a\u0300b\u3000c").width_at_offset(0), 0)
        self.assertEqual(fmtstr("a\u0300b\u3000c").width_at_offset(1), 1)
        self.assertEqual(fmtstr("a\u0300b\u3000c").width_at_offset(2), 1)
        self.assertEqual(fmtstr("a\u0300b\u3000c").width_at_offset(3), 2)
        self.assertEqual(len(fmtstr("a\u0300")), 2)
        self.assertEqual(fmtstr("a\u0300").width, 1)


class TestWidthHelpers(unittest.TestCase):
    def test_combining_char_aware_slice(self) -> None:
        self.assertEqual(width_aware_slice("abc", 0, 2), "ab")
        self.assertEqual(width_aware_slice("abc", 1, 3), "bc")
        self.assertEqual(width_aware_slice("abc", 0, 3), "abc")
        self.assertEqual(width_aware_slice("ab\u0300c", 0, 3), "ab\u0300c")
        self.assertEqual(width_aware_slice("ab\u0300c", 0, 2), "ab\u0300")
        self.assertEqual(width_aware_slice("ab\u0300c", 1, 3), "b\u0300c")
        self.assertEqual(width_aware_slice("ab\u0300\u0300c", 1, 3), "b\u0300\u0300c")
        self.assertEqual(width_aware_slice("ab\u0300\u0300c", 0, 2), "ab\u0300\u0300")
        self.assertEqual(width_aware_slice("ab\u0300\u0300c", 2, 3), "c")

    def test_char_width_aware_slice(self) -> None:
        self.assertEqual(width_aware_slice("abc", 1, 2), "b")
        self.assertEqual(width_aware_slice("aＥbc", 0, 4), "aＥb")
        self.assertEqual(width_aware_slice("aＥbc", 1, 4), "Ｅb")
        self.assertEqual(width_aware_slice("aＥbc", 2, 4), " b")
        self.assertEqual(width_aware_slice("aＥbc", 0, 2), "a ")


class TestChunk(unittest.TestCase):
    def test_repr(self) -> None:
        c = Chunk("a", {"fg": 32})
        self.assertEqual(repr(c), """Chunk('a', {'fg': 32})""")


class TestChunkSplitter(unittest.TestCase):
    def test_chunk_splitter(self) -> None:
        splitter = Chunk("asdf", {"fg": 32}).splitter()
        self.assertEqual(splitter.request(1), (1, Chunk("a", {"fg": 32})))
        self.assertEqual(splitter.request(4), (3, Chunk("sdf", {"fg": 32})))
        self.assertEqual(splitter.request(4), None)

    def test_reusing_same_splitter(self) -> None:
        c = Chunk("asdf", {"fg": 32})
        s1 = c.splitter()
        self.assertEqual(s1.request(3), (3, Chunk("asd", {"fg": 32})))
        s1.reinit(c)
        self.assertEqual(s1.request(3), (3, Chunk("asd", {"fg": 32})))
        s1.reinit(c)
        self.assertEqual(s1.request(3), (3, Chunk("asd", {"fg": 32})))

        c2 = Chunk("abcdef", {})
        s1.reinit(c2)
        self.assertEqual(s1.request(3), (3, Chunk("abc")))

    def test_width_awareness(self) -> None:
        Chunk("asdf")
        self.assertEqual(
            Chunk("ab\u0300c").splitter().request(3), (3, Chunk("ab\u0300c"))
        )
        self.assertEqual(
            Chunk("ab\u0300c").splitter().request(2), (2, Chunk("ab\u0300"))
        )

        s = Chunk("ab\u0300c").splitter()
        self.assertEqual(s.request(1), (1, Chunk("a")))
        self.assertEqual(s.request(2), (2, Chunk("b\u0300c")))

        c = Chunk("aＥbc")
        self.assertEqual(c.splitter().request(4), (4, Chunk("aＥb")))
        s = c.splitter()
        self.assertEqual(s.request(2), (2, Chunk("a ")))
        self.assertEqual(s.request(2), (2, Chunk("Ｅ")))
        self.assertEqual(s.request(2), (2, Chunk("bc")))
        self.assertEqual(s.request(2), None)


class TestFSArray(unittest.TestCase):
    def test_no_hanging_space(self) -> None:
        a = FSArray(4, 2)
        self.assertEqual(len(a.rows[0]), 0)

    def test_assignment_working(self) -> None:
        t = FSArray(10, 10)
        t[2, 2] = "a"
        # TODO: is this supposed to check something?
        t[2, 2] == "a"

    def test_normalize_slice(self) -> None:
        class SliceBuilder:
            def __getitem__(self, slice: slice) -> slice:
                return slice

        Slice = SliceBuilder()

        self.assertEqual(normalize_slice(10, Slice[:3]), slice(0, 3, None))
        self.assertEqual(normalize_slice(11, Slice[3:]), slice(3, 11, None))

    @skip("TODO")
    def test_oomerror(self) -> None:
        a = FSArray(10, 40)
        a[2:-2, 2:-2] = fsarray(["asdf", "zxcv"])


class FormatStringTest(unittest.TestCase):
    def assertFSArraysEqual(self, a: FSArray, b: FSArray) -> None:
        self.assertIsInstance(a, FSArray)
        self.assertIsInstance(b, FSArray)
        self.assertEqual(
            (a.width, a.height),
            (b.width, b.height),
            f"fsarray dimensions do not match: {a.shape} {b.shape}",
        )
        for i, (a_row, b_row) in enumerate(zip(a, b)):
            self.assertEqual(
                a_row,
                b_row,
                "FSArrays differ first on line {}:\n{}".format(i, FSArray.diff(a, b)),
            )

    def assertFSArraysEqualIgnoringFormatting(self, a: FSArray, b: FSArray) -> None:
        """Also accepts arrays of strings"""
        self.assertEqual(
            len(a),
            len(b),
            "fsarray heights do not match: %s %s \n%s \n%s"
            % (len(a), len(b), simple_format(a), simple_format(b)),
        )
        for i, (a_row, b_row) in enumerate(zip(a, b)):
            a_row = a_row.s if isinstance(a_row, FmtStr) else a_row
            b_row = b_row.s if isinstance(b_row, FmtStr) else b_row
            self.assertEqual(
                a_row,
                b_row,
                "FSArrays differ first on line %s:\n%s"
                % (i, FSArray.diff(a, b, ignore_formatting=True)),
            )


class TestFSArrayWithDiff(FormatStringTest):
    def test_diff_testing(self) -> None:
        a = fsarray(["abc", "def"])
        b = fsarray(["abc", "dqf"])
        self.assertRaises(AssertionError, self.assertFSArraysEqual, a, b)
        a = fsarray([blue("abc"), red("def")])
        b = fsarray([blue("abc"), red("dqf")])
        self.assertRaises(AssertionError, self.assertFSArraysEqual, a, b)
        a = fsarray([blue("abc"), red("def")])
        b = fsarray([blue("abc"), red("d") + blue("e") + red("f")])
        self.assertRaises(AssertionError, self.assertFSArraysEqual, a, b)
        a = fsarray(["abc", "def"])
        b = fsarray(["abc", "def"])
        self.assertFSArraysEqual(a, b)
        a = fsarray([blue("abc"), red("def")])
        b = fsarray([blue("abc"), red("def")])
        self.assertFSArraysEqual(a, b)


if __name__ == "__main__":
    unittest.main()