Function TestFocusBlurMsgsAreInert

internal/tui/tui_test.go:2844–2870

TestFocusBlurMsgsAreInert: terminal focus reports arrive as tea.FocusMsg / tea.BlurMsg under tea.WithReportFocus. They must never touch the textarea (no inserted chars, no height change), else the UI slides up when another window steals focus.

(t *testing.T)

			{Role: chmctx.RoleTool, Content: "out"},
		}, true},
		{"no assistant at all", []chmctx.Message{
			{Role: chmctx.RoleUser, Content: "go"},
		}, false},
	}
	for _, tc := range cases {
		if got := newestAssistantEmpty(tc.hist); got != tc.want {
			t.Errorf("%s: newestAssistantEmpty = %v, want %v", tc.name, got, tc.want)
		}
	}
}

// TestEmptyReplyNudgeRePromptsThenRecovers: a turn whose first round comes back
// with no content and no tool call (the dominant silent death: a thinking
// model's tool call swallowed into the reasoning channel) must be reprompted
// once, not ended silently. Here the second round produces a real summary, so
// the run self heals.
func TestEmptyReplyNudgeRePromptsThenRecovers(t *testing.T) {
	var round int
	handler := func(w http.ResponseWriter, _ *http.Request) {
		w.Header().Set("Content-Type", "text/event-stream")
		round++
		if round == 1 {
			// Empty assistant message: stop with no content delta, no tool calls.
			fmt.Fprintf(w, "data: %s\n\n", `{"type":"response.completed","response":{"usage":{"output_tokens":1}}}`)
			return
		}
		fmt.Fprintf(w, "data: %s\n\n", `{"type":"response.output_text.delta","delta":"fixed and verified"}`)
		fmt.Fprintf(w, "data: %s\n\n", `{"type":"response.completed","response":{"usage":{"output_tokens":3}}}`)
	}