feat: harden concurrency scheduling and task watchdog

pkg/tools/shell_timeout_test.go

@@ -0,0 +1,48 @@
+package tools
+
+import (
+	"testing"
+	"time"
+)
+
+func TestIsHeavyCommand(t *testing.T) {
+	tests := []struct {
+		command string
+		heavy   bool
+	}{
+		{command: "docker build -t app .", heavy: true},
+		{command: "docker compose build api", heavy: true},
+		{command: "go test ./...", heavy: true},
+		{command: "npm run build", heavy: true},
+		{command: "echo hello", heavy: false},
+	}
+
+	for _, tt := range tests {
+		if got := isHeavyCommand(tt.command); got != tt.heavy {
+			t.Fatalf("isHeavyCommand(%q)=%v want %v", tt.command, got, tt.heavy)
+		}
+	}
+}
+
+func TestCommandTickBase(t *testing.T) {
+	light := (&ExecTool{}).commandTickBase("echo hello")
+	heavy := (&ExecTool{}).commandTickBase("docker build -t app .")
+	if heavy <= light {
+		t.Fatalf("expected heavy command base tick > light, got heavy=%v light=%v", heavy, light)
+	}
+}
+
+func TestNextCommandTick(t *testing.T) {
+	base := 2 * time.Second
+	t1 := nextCommandTick(base, 30*time.Second)
+	t2 := nextCommandTick(base, 5*time.Minute)
+	if t1 < base {
+		t.Fatalf("tick should not shrink below base: %v", t1)
+	}
+	if t2 <= t1 {
+		t.Fatalf("tick should grow with elapsed time: t1=%v t2=%v", t1, t2)
+	}
+	if t2 > 45*time.Second {
+		t.Fatalf("tick should be capped, got %v", t2)
+	}
+}