tui: add dashboard processes table tab

1 files changed, 61 insertions, 0 deletions

diff --git a/internal/tui/dashboard/processes_test.go b/internal/tui/dashboard/processes_test.go
new file mode 100644
index 0000000..4db490d
--- /dev/null
+++ b/internal/tui/dashboard/processes_test.go
@@ -0,0 +1,61 @@
+package dashboard
+
+import (
+	"strings"
+	"testing"
+
+	"ior/internal/flags"
+	"ior/internal/statsengine"
+)
+
+func TestRenderProcessesIncludesHeaders(t *testing.T) {
+	flags.SetPidFilter(-1)
+
+	snap := statsengine.NewSnapshot(
+		nil, nil, nil,
+		nil, nil,
+		[]statsengine.ProcessSnapshot{
+			{PID: 200, Comm: "proc-b", Syscalls: 10, RatePerSec: 2.3, Bytes: 2048, AvgLatencyNs: 1500},
+			{PID: 100, Comm: "proc-a", Syscalls: 20, RatePerSec: 4.6, Bytes: 4096, AvgLatencyNs: 2500},
+		},
+		statsengine.HistogramSnapshot{},
+		statsengine.HistogramSnapshot{},
+	)
+
+	out := renderProcesses(&snap, 120, 30)
+	for _, token := range []string{"PID", "Comm", "Syscalls", "Total Bytes", "Avg Latency"} {
+		if !strings.Contains(out, token) {
+			t.Fatalf("expected header token %q", token)
+		}
+	}
+	if !strings.Contains(out, "100") || !strings.Contains(out, "proc-a") {
+		t.Fatalf("expected process row in output")
+	}
+}
+
+func TestRenderProcessesShowsSinglePIDNote(t *testing.T) {
+	flags.SetPidFilter(77)
+	t.Cleanup(func() { flags.SetPidFilter(-1) })
+
+	snap := statsengine.NewSnapshot(
+		nil, nil, nil,
+		nil, nil,
+		[]statsengine.ProcessSnapshot{
+			{PID: 77, Comm: "proc", Syscalls: 1},
+		},
+		statsengine.HistogramSnapshot{},
+		statsengine.HistogramSnapshot{},
+	)
+
+	out := renderProcesses(&snap, 100, 20)
+	if !strings.Contains(out, "most useful with All PIDs") {
+		t.Fatalf("expected single-pid guidance note")
+	}
+}
+
+func TestTruncateText(t *testing.T) {
+	got := truncateText("very-long-process-name", 10)
+	if got != "very-lo..." {
+		t.Fatalf("unexpected truncation result: %q", got)
+	}
+}