1 files changed, 143 insertions, 0 deletions
diff --git a/Lib/test/test_pyrepl/test_eventqueue.py b/Lib/test/test_pyrepl/test_eventqueue.py
new file mode 100644
index 00000000000..a1bac38fbd4
--- /dev/null
+++ b/Lib/test/test_pyrepl/test_eventqueue.py
@@ -0,0 +1,143 @@
+import tempfile
+import unittest
+import sys
+from unittest.mock import patch
+from test import support
+
+try:
+    from _pyrepl.console import Event
+    from _pyrepl import base_eventqueue
+except ImportError:
+    pass
+
+try:
+    from _pyrepl import unix_eventqueue
+except ImportError:
+    pass
+
+try:
+    from _pyrepl import windows_eventqueue
+except ImportError:
+    pass
+
+class EventQueueTestBase:
+    """OS-independent mixin"""
+    def make_eventqueue(self) -> base_eventqueue.BaseEventQueue:
+        raise NotImplementedError()
+
+    def test_get(self):
+        eq = self.make_eventqueue()
+        event = Event("key", "a", b"a")
+        eq.insert(event)
+        self.assertEqual(eq.get(), event)
+
+    def test_empty(self):
+        eq = self.make_eventqueue()
+        self.assertTrue(eq.empty())
+        eq.insert(Event("key", "a", b"a"))
+        self.assertFalse(eq.empty())
+
+    def test_flush_buf(self):
+        eq = self.make_eventqueue()
+        eq.buf.extend(b"test")
+        self.assertEqual(eq.flush_buf(), b"test")
+        self.assertEqual(eq.buf, bytearray())
+
+    def test_insert(self):
+        eq = self.make_eventqueue()
+        event = Event("key", "a", b"a")
+        eq.insert(event)
+        self.assertEqual(eq.events[0], event)
+
+    @patch("_pyrepl.base_eventqueue.keymap")
+    def test_push_with_key_in_keymap(self, mock_keymap):
+        mock_keymap.compile_keymap.return_value = {"a": "b"}
+        eq = self.make_eventqueue()
+        eq.keymap = {b"a": "b"}
+        eq.push("a")
+        mock_keymap.compile_keymap.assert_called()
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "b")
+
+    @patch("_pyrepl.base_eventqueue.keymap")
+    def test_push_without_key_in_keymap(self, mock_keymap):
+        mock_keymap.compile_keymap.return_value = {"a": "b"}
+        eq = self.make_eventqueue()
+        eq.keymap = {b"c": "d"}
+        eq.push("a")
+        mock_keymap.compile_keymap.assert_called()
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "a")
+
+    @patch("_pyrepl.base_eventqueue.keymap")
+    def test_push_with_keymap_in_keymap(self, mock_keymap):
+        mock_keymap.compile_keymap.return_value = {"a": "b"}
+        eq = self.make_eventqueue()
+        eq.keymap = {b"a": {b"b": "c"}}
+        eq.push("a")
+        mock_keymap.compile_keymap.assert_called()
+        self.assertTrue(eq.empty())
+        eq.push("b")
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "c")
+        eq.push("d")
+        self.assertEqual(eq.events[1].evt, "key")
+        self.assertEqual(eq.events[1].data, "d")
+
+    @patch("_pyrepl.base_eventqueue.keymap")
+    def test_push_with_keymap_in_keymap_and_escape(self, mock_keymap):
+        mock_keymap.compile_keymap.return_value = {"a": "b"}
+        eq = self.make_eventqueue()
+        eq.keymap = {b"a": {b"b": "c"}}
+        eq.push("a")
+        mock_keymap.compile_keymap.assert_called()
+        self.assertTrue(eq.empty())
+        eq.flush_buf()
+        eq.push("\033")
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "\033")
+        eq.push("b")
+        self.assertEqual(eq.events[1].evt, "key")
+        self.assertEqual(eq.events[1].data, "b")
+
+    def test_push_special_key(self):
+        eq = self.make_eventqueue()
+        eq.keymap = {}
+        eq.push("\x1b")
+        eq.push("[")
+        eq.push("A")
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "\x1b")
+
+    def test_push_unrecognized_escape_sequence(self):
+        eq = self.make_eventqueue()
+        eq.keymap = {}
+        eq.push("\x1b")
+        eq.push("[")
+        eq.push("Z")
+        self.assertEqual(len(eq.events), 3)
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "\x1b")
+        self.assertEqual(eq.events[1].evt, "key")
+        self.assertEqual(eq.events[1].data, "[")
+        self.assertEqual(eq.events[2].evt, "key")
+        self.assertEqual(eq.events[2].data, "Z")
+
+
+@unittest.skipIf(support.MS_WINDOWS, "No Unix event queue on Windows")
+class TestUnixEventQueue(EventQueueTestBase, unittest.TestCase):
+    def setUp(self):
+        self.enterContext(patch("_pyrepl.curses.tigetstr", lambda x: b""))
+        self.file = tempfile.TemporaryFile()
+
+    def tearDown(self) -> None:
+        self.file.close()
+
+    def make_eventqueue(self) -> base_eventqueue.BaseEventQueue:
+        return unix_eventqueue.EventQueue(self.file.fileno(), "utf-8")
+
+
+@unittest.skipUnless(support.MS_WINDOWS, "No Windows event queue on Unix")
+class TestWindowsEventQueue(EventQueueTestBase, unittest.TestCase):
+    def make_eventqueue(self) -> base_eventqueue.BaseEventQueue:
+        return windows_eventqueue.EventQueue("utf-8")