test: hazards, ladders and one-way platforms

tests/test_oneway.py

@@ -0,0 +1,67 @@
+import pytest
+
+from game import constants
+from tests.support import makeWorld
+from game.sim.inputCommand import InputCommand
+
+
+def test_landsOnOneWayFromAbove():
+    world = makeWorld([
+        " p    ",
+        "      ",
+        "======",
+        "      ",
+        "XXXXXX",
+    ])
+    for _ in range(30):
+        world.step(InputCommand())
+    player = world.player
+    assert player.onGround
+    assert player.bottom == pytest.approx(2 * constants.tileSize)
+
+
+def test_passesThroughOneWayFromBelow():
+    world = makeWorld([
+        "      ",
+        "======",
+        "      ",
+        " p    ",
+        "XXXXXX",
+    ])
+    minY = world.player.y
+    world.step(InputCommand(jump=True, jumpHeld=True))
+    for _ in range(16):
+        world.step(InputCommand(jumpHeld=True))
+        minY = min(minY, world.player.y)
+    assert minY < constants.tileSize
+
+
+def test_dropThroughOneWay():
+    world = makeWorld([
+        " p    ",
+        "      ",
+        "======",
+        "      ",
+        "XXXXXX",
+    ])
+    for _ in range(30):
+        world.step(InputCommand())
+    assert world.player.bottom == pytest.approx(2 * constants.tileSize)
+    for _ in range(30):
+        world.step(InputCommand(down=True, jump=True))
+    assert world.player.bottom == pytest.approx(4 * constants.tileSize)
+
+
+def test_downWithoutJumpKeepsPlayerOnOneWay():
+    world = makeWorld([
+        " p    ",
+        "      ",
+        "======",
+        "      ",
+        "XXXXXX",
+    ])
+    for _ in range(30):
+        world.step(InputCommand())
+    for _ in range(20):
+        world.step(InputCommand(down=True))
+    assert world.player.bottom == pytest.approx(2 * constants.tileSize)