Function TestToolArgsStreamBumpsEstimateAndPhase

internal/tui/tui_test.go:1086–1097

TestToolArgsStreamBumpsEstimateAndPhase: a tool-call argument fragment (a file streaming into write_file) ticks the live token estimate AND flips the phase to "generating", so the counter doesn't freeze through a long file write: the bug where only chat content and reasoning were counted, not tool a

(t *testing.T)

// streaming into write_file) ticks the live token estimate AND flips the phase
// to "generating", so the counter doesn't freeze through a long file write: the
// bug where only chat content and reasoning were counted, not tool arguments.
func TestToolArgsStreamBumpsEstimateAndPhase(t *testing.T) {
	m := newTestModel(t, func(http.ResponseWriter, *http.Request) {})
	m.phase = phaseThinking // a tool-only round starts here, before any content
	out, _ := m.handleStream(llm.Event{Kind: llm.EventToolArgs, Content: strings.Repeat("x", 40)})
	m = out.(Model)
	if m.phase != phaseStreaming {
		t.Fatalf("EventToolArgs should flip thinking→generating, phase=%v", m.phase)
	}
	if m.streamingEstimate != 10 { // 40 chars / 4
		t.Fatalf("EventToolArgs should bump the estimate by len/4, got %d", m.streamingEstimate)
	}
}

// TestBuildToolsExposesExactlyFourTools pins the tool roster: bash, read_file,