FrameBridge 0.3.1 community source release
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import copy
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from datetime import datetime, timezone, timedelta
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import hashlib
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import os
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from pathlib import Path
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import tempfile
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import unittest
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from unittest.mock import patch
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from framebridge_expanded.real_screen import screen_control as m
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class ScreenControlTests(unittest.TestCase):
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def setUp(self):
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self.temp = tempfile.TemporaryDirectory()
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self.path = Path(self.temp.name) / "screen.png"
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self.path.write_bytes(b"immutable-observed-frame-fixture")
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self.binding = {"version": 1, "backend": "visible-tmux", "node": "TESTNODE",
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"uid": os.getuid(), "active_vt": "tty1", "client_tty": "/dev/tty1",
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"socket": {"path": "/run/user/1000/console.sock", "inode": 12},
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"server": {"pid": 100, "start_ticks": 20},
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"client": {"pid": 101, "start_ticks": 21},
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"session_id": "$0", "window_id": "@0", "pane_id": "%1",
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"pane": {"pid": 102, "start_ticks": 22},
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"pane_geometry": [120, 0, 120, 66], "pane_in_mode": False}
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self.manifest = {"capture_id": "a" * 32, "source": "linux-framebuffer",
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"screen_type": "tty", "active_vt": "tty1", "node": "TESTNODE",
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"uid": os.getuid(), "synthetic": False, "pixel_source_verified": True,
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"path": str(self.path), "sha256": hashlib.sha256(self.path.read_bytes()).hexdigest(),
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"completed_at": datetime.now(timezone.utc).isoformat(),
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"binding": copy.deepcopy(self.binding)}
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def tearDown(self):
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self.temp.cleanup()
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def refused(self, change, code="SCREEN_BINDING_CHANGED"):
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different = copy.deepcopy(self.binding)
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change(different)
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with patch.object(m, "snapshot_binding", return_value=different), patch.object(m, "_tmux") as send:
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "key.send", key="ENTER")
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self.assertEqual(e.exception.code, code)
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send.assert_not_called()
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def test_bind_returns_copy(self):
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with patch.object(m, "snapshot_binding", return_value=self.binding):
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result = m.bind_screen(self.manifest)
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self.assertIsNot(result, self.manifest)
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self.assertEqual(result["binding"], self.binding)
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def test_bind_vt_mismatch(self):
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self.manifest["active_vt"] = "tty2"
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with patch.object(m, "snapshot_binding", return_value=self.binding):
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with self.assertRaises(m.ControlError) as e:
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m.bind_screen(self.manifest)
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self.assertEqual(e.exception.code, "SCREEN_CAPTURE_VT_MISMATCH")
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def test_bind_node_mismatch(self):
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self.manifest["node"] = "OTHER"
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with patch.object(m, "snapshot_binding", return_value=self.binding):
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with self.assertRaises(m.ControlError) as e:
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m.bind_screen(self.manifest)
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self.assertEqual(e.exception.code, "SCREEN_CAPTURE_NODE_MISMATCH")
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def test_wrong_source(self):
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self.manifest["source"] = "rendered-text"
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with self.assertRaises(m.ControlError) as e:
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m.bind_screen(self.manifest)
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self.assertEqual(e.exception.code, "SCREEN_CONTROL_MODE_UNSUPPORTED")
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def test_literal_text_no_shell_or_enter(self):
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text = "printf '%s' '$(touch never)'"
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with patch.object(m, "snapshot_binding", return_value=self.binding), patch.object(m, "_tmux", return_value="") as send:
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result = m.act(self.manifest, "text.type", text=text)
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self.assertTrue(result["performed"])
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send.assert_called_once_with(self.binding["socket"]["path"], "send-keys", "-t", "%1", "-l", "--", text)
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def test_explicit_key(self):
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with patch.object(m, "snapshot_binding", return_value=self.binding), patch.object(m, "_tmux", return_value="") as send:
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result = m.act(self.manifest, "key.send", key="ENTER")
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self.assertTrue(result["performed"])
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send.assert_called_once_with(self.binding["socket"]["path"], "send-keys", "-t", "%1", "Enter")
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def test_text_newline_rejected(self):
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with patch.object(m, "_tmux") as send:
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "text.type", text="pwd\n")
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self.assertEqual(e.exception.code, "SCREEN_TEXT_CONTROL_CHARACTER")
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send.assert_not_called()
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def test_unknown_key_rejected(self):
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with patch.object(m, "_tmux") as send:
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with self.assertRaises(m.ControlError):
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m.act(self.manifest, "key.send", key="ALT_F2")
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send.assert_not_called()
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def test_changed_vt_no_input(self):
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self.refused(lambda b: b.update(active_vt="tty2"))
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def test_changed_pane_no_input(self):
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self.refused(lambda b: b["pane"].update(pid=222))
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def test_pid_reuse_no_input(self):
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self.refused(lambda b: b["pane"].update(start_ticks=23))
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def test_changed_socket_no_input(self):
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self.refused(lambda b: b["socket"].update(inode=13))
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def test_changed_geometry_no_input(self):
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self.refused(lambda b: b.update(pane_geometry=[0, 0, 240, 66]))
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def test_hidden_client_no_fallback(self):
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identity = {"path": "/run/user/1000/console.sock", "inode": 12}
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client_row = "101|/dev/tty2|$0|240|67|0\n"
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with patch.object(m, "_active_vt", return_value="tty1"), patch.object(m, "_server_sockets", return_value=[(identity, {"pid": 100})]), patch.object(m, "_tmux", return_value=client_row) as run:
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with self.assertRaises(m.ControlError) as e:
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m.snapshot_binding()
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self.assertEqual(e.exception.code, "SCREEN_VISIBLE_TMUX_NOT_FOUND")
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self.assertEqual(run.call_count, 1)
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def test_postflight_change_reports_performed(self):
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other = copy.deepcopy(self.binding)
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other["pane_id"] = "%2"
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with patch.object(m, "snapshot_binding", side_effect=[self.binding, self.binding, other]), patch.object(m, "_tmux", return_value="") as send:
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "key.send", key="ENTER")
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self.assertEqual(e.exception.code, "SCREEN_CHANGED_AFTER_INPUT")
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self.assertTrue(e.exception.details["performed"])
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send.assert_called_once()
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def test_tampered_capture_no_input(self):
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self.path.write_bytes(b"changed")
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with patch.object(m, "_tmux") as send:
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "key.send", key="ENTER")
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self.assertEqual(e.exception.code, "SCREEN_CAPTURE_SHA256_MISMATCH")
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send.assert_not_called()
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def test_capture_id_required(self):
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self.manifest.pop("capture_id")
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "key.send", key="ENTER")
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self.assertEqual(e.exception.code, "SCREEN_CAPTURE_ID_REQUIRED")
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def test_copy_mode_does_not_type_into_hidden_application(self):
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self.binding["pane_in_mode"] = True
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self.manifest["binding"] = copy.deepcopy(self.binding)
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self.refused(lambda b: None, "SCREEN_TMUX_MODE_INPUT_UNSUPPORTED")
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def test_optional_explicit_age_limit(self):
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self.manifest["completed_at"] = (datetime.now(timezone.utc) - timedelta(hours=1)).isoformat()
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with self.assertRaises(m.ControlError) as e:
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m.act(self.manifest, "key.send", key="ENTER", max_age_s=30)
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self.assertEqual(e.exception.code, "SCREEN_CAPTURE_EXPIRED")
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def test_no_arbitrary_age_expiry_by_default(self):
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self.manifest["completed_at"] = (datetime.now(timezone.utc) - timedelta(hours=1)).isoformat()
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with patch.object(m, "snapshot_binding", return_value=self.binding), patch.object(m, "_tmux", return_value=""):
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self.assertTrue(m.act(self.manifest, "key.send", key="ENTER")["performed"])
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if __name__ == "__main__":
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unittest.main()
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