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aiturk-hermes-ide/ui-tui/src/__tests__/reasoning.test.ts
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TypeScript

import { describe, expect, it } from 'vitest'
import { hasReasoningTag, splitReasoning } from '../lib/reasoning.js'
import { cleanThinkingText } from '../lib/text.js'
describe('splitReasoning', () => {
it('extracts <think>…</think> and strips it from text', () => {
const { reasoning, text } = splitReasoning('<think>plotting</think>\n\nhere is the answer')
expect(reasoning).toBe('plotting')
expect(text).toBe('here is the answer')
})
it('handles multiple tag shapes', () => {
const input = '<reasoning>a</reasoning> <THINKING>b</THINKING> <thought>c</thought> body'
const { reasoning, text } = splitReasoning(input)
expect(reasoning).toContain('a')
expect(reasoning).toContain('b')
expect(reasoning).toContain('c')
expect(text).toBe('body')
})
it('treats unclosed leading <think>… as reasoning (real reasoning-model stream)', () => {
const { reasoning, text } = splitReasoning('<think>still deciding')
expect(reasoning).toBe('still deciding')
expect(text).toBe('')
})
it('does not strip trailing prose after a stray mid-text <think> mention', () => {
// Regression for "TUI eats last paragraph of output": when the model
// emits a literal `<think>` somewhere in prose (quoted explanation, code
// example, partial stream-mid-tag), the trailing greedy unclosed-tag
// regex used to consume every paragraph after it. Real unclosed
// reasoning blocks always lead the message — anchor to ^ so prose
// mentions are preserved.
const { reasoning, text } = splitReasoning(
'final answer paragraph one.\n\n<think>internal note never closed\n\nfinal answer paragraph two.'
)
expect(reasoning).toBe('')
expect(text).toBe('final answer paragraph one.\n\n<think>internal note never closed\n\nfinal answer paragraph two.')
})
it('returns empty reasoning and untouched text when no tags present', () => {
const { reasoning, text } = splitReasoning('plain body with no tags')
expect(reasoning).toBe('')
expect(text).toBe('plain body with no tags')
})
it('preserves text when reasoning block is empty', () => {
const { reasoning, text } = splitReasoning('<think></think>only body')
expect(reasoning).toBe('')
expect(text).toBe('only body')
})
it('detects presence of any supported tag', () => {
expect(hasReasoningTag('pre <think>x</think> post')).toBe(true)
expect(hasReasoningTag('pre <reasoning>x</reasoning>')).toBe(true)
expect(hasReasoningTag('<REASONING_SCRATCHPAD>x</REASONING_SCRATCHPAD>')).toBe(true)
expect(hasReasoningTag('no tags at all')).toBe(false)
})
})
describe('cleanThinkingText', () => {
it('removes face/status ticker fragments while preserving real reasoning', () => {
expect(
cleanThinkingText(
'(¬_¬) synthesizing...**Resolving comments on GitHub**\n( ͡° ͜ʖ ͡°) musing...\nActual step\n٩(๑❛ᴗ❛๑)۶ contemplating...next step'
)
).toBe('**Resolving comments on GitHub**\nActual step\nnext step')
})
})