Initial commit, with rules 0.5 and basic bots

tests/test_grid.py

@@ -0,0 +1,59 @@
+import pytest
+
+from dojo.grid import GridFormatError, parse_grid, render_grid
+
+SMALL = """\
++---+---+
+| S | . |
++   +---+
+| 1   +
++---+---+
+"""
+
+
+def test_parse_small_grid() -> None:
+    grid = parse_grid(SMALL)
+
+    assert (grid.height, grid.width) == (2, 2)
+    assert grid.cells == (("S", "."), ("1", "+"))
+    assert grid.h_walls == ((True, True), (False, True), (True, True))
+    assert grid.v_walls == ((True, True, True), (True, False, False))
+
+
+def test_render_round_trips() -> None:
+    grid = parse_grid(SMALL)
+
+    assert parse_grid(render_grid(grid)) == grid
+
+
+def test_stripped_trailing_space_is_an_open_right_border() -> None:
+    grid = parse_grid(SMALL)
+
+    assert grid.v_walls[1][2] is False
+
+
+def test_comments_and_blank_lines_are_ignored() -> None:
+    commented = "# header\n\n" + SMALL.replace("+   +---+\n", "+   +---+\n# note\n")
+
+    assert parse_grid(commented) == parse_grid(SMALL)
+
+
+@pytest.mark.parametrize(
+    ("text", "message"),
+    [
+        ("", "no grid lines"),
+        ("+---+--+\n", "4*width+1"),
+        ("+---+\n| . |\n", "odd number of lines"),
+        ("+---+\n| . |\n----+\n", "expected '+'"),
+        ("+---+\n| . |\n+-- +\n", "expected '---' or blanks"),
+        ("+---+\n| . !\n+---+\n", "expected '|' or blank"),
+        ("+---+\n|  . |\n+---+\n", "longer than the top border"),
+        ("+---+\n|.  |\n+---+\n", "' X '"),
+        ("+---+\n|   |\n+---+\n", "' X '"),
+    ],
+)
+def test_format_errors(text: str, message: str) -> None:
+    with pytest.raises(GridFormatError) as raised:
+        parse_grid(text, source="t.txt")
+
+    assert any(message in problem for problem in raised.value.problems)