tui: add fd trace drilldown and fd column in stream

1 files changed, 22 insertions, 2 deletions

diff --git a/internal/tui/eventstream/render_test.go b/internal/tui/eventstream/render_test.go
index 8c2d39a..33e5b38 100644
--- a/internal/tui/eventstream/render_test.go
+++ b/internal/tui/eventstream/render_test.go
@@ -34,6 +34,14 @@ func TestRenderPausedAndErrorRow(t *testing.T) {
 	}
 }
 
+func TestRenderShowsFDWhenPresent(t *testing.T) {
+	events := []StreamEvent{{Syscall: "read", Comm: "worker", PID: 1, TID: 2, FD: 9, DurationNs: 10, GapNs: 1, Bytes: 8, FileName: "/tmp/b", RetVal: 8}}
+	out := RenderStreamTable(120, false, 1, 1, 1, 10000, Filter{}, events, -1)
+	if !strings.Contains(out, "FD") || !strings.Contains(out, " 9 ") {
+		t.Fatalf("expected FD column/value in output\n%s", out)
+	}
+}
+
 func TestRenderHeaderAndTruncate(t *testing.T) {
 	events := []StreamEvent{{
 		Syscall:    "very_long_syscall_name",
@@ -48,7 +56,7 @@ func TestRenderHeaderAndTruncate(t *testing.T) {
 	}}
 	out := RenderStreamTable(80, false, 1, 1, 1, 10000, Filter{}, events, -1)
 
-	for _, col := range []string{"Gap", "Latency", "Comm", "PID.TID", "Syscall", "Ret", "Bytes", "File"} {
+	for _, col := range []string{"Gap", "Latency", "Comm", "PID.TID", "Syscall", "FD", "Ret", "Bytes", "File"} {
 		if !strings.Contains(out, col) {
 			t.Fatalf("missing column %q\n%s", col, out)
 		}
@@ -98,7 +106,7 @@ func TestRenderEventRowIsSingleLineWithControlCharsAndLongValues(t *testing.T) {
 
 func TestComputeColumnLayoutGivesFileMoreSpace(t *testing.T) {
 	cols := computeColumnLayout(120)
-	if cols.file < 55 {
+	if cols.file < 50 {
 		t.Fatalf("expected file column to get most width, got %d", cols.file)
 	}
 }
@@ -124,3 +132,15 @@ func TestRenderStreamTableFitsRequestedWidth(t *testing.T) {
 		}
 	}
 }
+
+func TestRenderFDTraceTableShowsHeaderAndScope(t *testing.T) {
+	out := RenderFDTraceTable(100, 123, 7, 2, []StreamEvent{
+		{Syscall: "read", PID: 123, TID: 1, FD: 7, FileName: "/tmp/a"},
+		{Syscall: "write", PID: 123, TID: 2, FD: 7, FileName: "/tmp/a"},
+	})
+	for _, want := range []string{"FD Trace (ring snapshot)", "PID:123 FD:7 matched:2", "read", "write"} {
+		if !strings.Contains(out, want) {
+			t.Fatalf("output missing %q\n%s", want, out)
+		}
+	}
+}