Add test for setflags command (#2056)

tests/gdb-tests/tests/test_command_flags.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import gdb
+
+import pwndbg.gdblib.regs
+import tests
+
+REFERENCE_BINARY = tests.binaries.get("reference-binary.out")
+
+
+def test_flags_command(start_binary):
+    start_binary(REFERENCE_BINARY)
+
+    old_eflags = pwndbg.gdblib.regs.eflags
+
+    # Verify CF is not set
+    assert old_eflags & 0x1 == 0
+
+    gdb.execute("setflag cf 1")
+
+    # Verify CF is set and no other flags have changed
+    assert (old_eflags | 1) == pwndbg.gdblib.regs.eflags
+
+    gdb.execute("setflag cf 0")
+
+    # Verify CF is not set and no other flags have changed
+    assert old_eflags == pwndbg.gdblib.regs.eflags
+
+    # Test setting an invalid value
+    gdb.execute("setflag cf 2")
+
+    # Verify no flags have changed
+    assert old_eflags == pwndbg.gdblib.regs.eflags