Add negative integration tests for unlink syscalls (task 348)

Add three negative test scenarios for unlink syscall family:
- unlink-enoent: SYS_UNLINK on nonexistent file (ENOENT)
- unlink-rmdir-notempty: SYS_RMDIR on non-empty directory (ENOTEMPTY)
- unlink-unlinkat-enoent: SYS_UNLINKAT on nonexistent file (ENOENT)

All scenarios use raw syscalls to hit exact tracepoints and verify
ior captures them on entry even when the kernel returns an error.

Amp-Thread-ID: https://ampcode.com/threads/T-019c81a6-6612-7247-9d54-6da5b63a38b4
Co-authored-by: Amp <amp@ampcode.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/integrationtests/unlink_test.go b/integrationtests/unlink_test.go
index 942f43d..3e61991 100644
--- a/integrationtests/unlink_test.go
+++ b/integrationtests/unlink_test.go
@@ -34,3 +34,36 @@ func TestUnlinkRmdir(t *testing.T) {
 		},
 	})
 }
+
+func TestUnlinkEnoent(t *testing.T) {
+	runScenario(t, "unlink-enoent", []ExpectedEvent{
+		{
+			PathContains: "unlink-enoent-missing.txt",
+			Tracepoint:   "enter_unlink",
+			Comm:         "ioworkload",
+			MinCount:     1,
+		},
+	})
+}
+
+func TestUnlinkRmdirNotempty(t *testing.T) {
+	runScenario(t, "unlink-rmdir-notempty", []ExpectedEvent{
+		{
+			PathContains: "rmdir-notempty",
+			Tracepoint:   "enter_rmdir",
+			Comm:         "ioworkload",
+			MinCount:     1,
+		},
+	})
+}
+
+func TestUnlinkUnlinkatEnoent(t *testing.T) {
+	runScenario(t, "unlink-unlinkat-enoent", []ExpectedEvent{
+		{
+			PathContains: "unlinkat-enoent-missing.txt",
+			Tracepoint:   "enter_unlinkat",
+			Comm:         "ioworkload",
+			MinCount:     1,
+		},
+	})
+}