test for alternate buffer

1 files changed, 10 insertions, 0 deletions

diff --git a/t/mode_test.py b/t/mode_test.py
index cfc50cb..7332b1e 100644
--- a/t/mode_test.py
+++ b/t/mode_test.py
@@ -186,3 +186,13 @@ class ModeTest(VT100Test):
         assert not self.vt.mouse_reporting_button_motion()
         assert not self.vt.mouse_reporting_sgr_mode()
         assert not self.vt.bracketed_paste()
+
+    def test_alternate_buffer(self):
+        self.process("\033[m\033[2J\033[H1\r\n2\r\n3\r\n4\r\n5\r\n6\r\n7\r\n8\r\n9\r\n10\r\n11\r\n12\r\n13\r\n14\r\n15\r\n16\r\n17\r\n18\r\n19\r\n20\r\n21\r\n22\r\n23\r\n24")
+        assert self.vt.window_contents() == "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n21\n22\n23\n24\n"
+        self.process("\033[?1049h")
+        assert self.vt.window_contents() == ('\n' * 24)
+        self.process("foobar")
+        assert self.vt.window_contents() == 'foobar' + ('\n' * 24)
+        self.process("\033[?1049l")
+        assert self.vt.window_contents() == "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n21\n22\n23\n24\n"