Function TestToolCallLeakWarningDetectsStrandedXML

internal/tui/tui_test.go:2233–2268

TestToolCallLeakWarningDetectsStrandedXML: a turn ending with leaked tool-call XML stranded in the newest assistant message warns the user; clean text doesn't, and only the NEWEST assistant message is inspected.

(t *testing.T)

		if msg.Role == chmctx.RoleSystem && strings.Contains(msg.Content, "acceptance criteria") {
			nudges++
		}
	}
	if nudges != 1 {
		t.Fatalf("expected exactly one finish re-grounding note in history, got %d", nudges)
	}
	if final.phase != phaseIdle {
		t.Fatalf("turn must end idle after the re-grounded finish, phase=%v", final.phase)
	}
}

// TestEndTurnResetsVerifyNudged: the latch is per-turn, so endTurn must clear it
// or a later turn never re-grounds.
func TestEndTurnResetsVerifyNudged(t *testing.T) {
	m := newTestModel(t, func(http.ResponseWriter, *http.Request) {})
	m.installTurnContext()
	m.verifyNudged = true
	m.endTurn()
	if m.verifyNudged {
		t.Fatal("endTurn must reset verifyNudged")
	}
}

// TestToolCallLeakWarningDetectsStrandedXML: a turn ending with leaked
// tool-call XML stranded in the newest assistant message warns the user; clean
// text doesn't, and only the NEWEST assistant message is inspected.
func TestToolCallLeakWarningDetectsStrandedXML(t *testing.T) {
	// XML tool-call body.
	coderLeak := "Let me search.\n<tool_call>\n<function=bash>\n<parameter=cmd>ls</parameter>\n</function>\n</tool_call>"
	// General JSON tool-call body, the target model class, NO `<function=`.
	denseLeak := "Let me search.\n<tool_call>\n{\"name\": \"bash\", \"arguments\": {\"cmd\": \"ls\"}}\n</tool_call>"
	clean := "Done - built and tested, all green."

	for name, leak := range map[string]string{"coder-xml": coderLeak, "dense-json": denseLeak} {
		if w := toolCallLeakWarning([]chmctx.Message{{Role: chmctx.RoleAssistant, Content: leak}}); w == "" {
			t.Fatalf("%s: leaked tool call must produce a warning", name)
		}
	}
	if w := toolCallLeakWarning([]chmctx.Message{{Role: chmctx.RoleAssistant, Content: clean}}); w != "" {
		t.Fatalf("clean reply must not warn, got %q", w)