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| 1 | +// SPDX-FileCopyrightText: 2025 LiveKit, Inc. |
| 2 | +// |
| 3 | +// SPDX-License-Identifier: Apache-2.0 |
| 4 | + |
| 5 | +/** |
| 6 | + * Unit tests for interruption detection logic in AgentActivity. |
| 7 | + * |
| 8 | + * Tests the refactored minInterruptionWords check which ensures: |
| 9 | + * - Consistent word count filtering across all speech scenarios |
| 10 | + * - Proper handling of empty strings, undefined, and short speech |
| 11 | + * - Interruptions allowed only when word count meets or exceeds minInterruptionWords threshold |
| 12 | + */ |
| 13 | +import { describe, expect, it } from 'vitest'; |
| 14 | +import { splitWords } from '../tokenize/basic/word.js'; |
| 15 | + |
| 16 | +describe('Interruption Detection - Word Counting', () => { |
| 17 | + describe('Word Splitting Behavior', () => { |
| 18 | + it('should count empty string as 0 words', () => { |
| 19 | + const text = ''; |
| 20 | + const wordCount = splitWords(text, true).length; |
| 21 | + expect(wordCount).toBe(0); |
| 22 | + }); |
| 23 | + |
| 24 | + it('should count single word correctly', () => { |
| 25 | + const text = 'hello'; |
| 26 | + const wordCount = splitWords(text, true).length; |
| 27 | + expect(wordCount).toBe(1); |
| 28 | + }); |
| 29 | + |
| 30 | + it('should count two words correctly', () => { |
| 31 | + const text = 'hello world'; |
| 32 | + const wordCount = splitWords(text, true).length; |
| 33 | + expect(wordCount).toBe(2); |
| 34 | + }); |
| 35 | + |
| 36 | + it('should count multiple words correctly', () => { |
| 37 | + const text = 'hello this is a full sentence'; |
| 38 | + const wordCount = splitWords(text, true).length; |
| 39 | + expect(wordCount).toBe(6); |
| 40 | + }); |
| 41 | + |
| 42 | + it('should handle punctuation correctly', () => { |
| 43 | + const text = 'hello, world!'; |
| 44 | + const wordCount = splitWords(text, true).length; |
| 45 | + expect(wordCount).toBe(2); |
| 46 | + }); |
| 47 | + |
| 48 | + it('should handle multiple spaces between words', () => { |
| 49 | + const text = 'hello world'; |
| 50 | + const wordCount = splitWords(text, true).length; |
| 51 | + expect(wordCount).toBe(2); |
| 52 | + }); |
| 53 | + |
| 54 | + it('should count whitespace-only string as 0 words', () => { |
| 55 | + const text = ' '; |
| 56 | + const wordCount = splitWords(text, true).length; |
| 57 | + expect(wordCount).toBe(0); |
| 58 | + }); |
| 59 | + |
| 60 | + it('should handle leading and trailing whitespace', () => { |
| 61 | + const text = ' hello world '; |
| 62 | + const wordCount = splitWords(text, true).length; |
| 63 | + expect(wordCount).toBe(2); |
| 64 | + }); |
| 65 | + }); |
| 66 | + |
| 67 | + describe('Integration: Full Interruption Check Logic', () => { |
| 68 | + it('should block interruption for empty transcript with threshold 2', () => { |
| 69 | + const text = ''; |
| 70 | + const minInterruptionWords = 2; |
| 71 | + |
| 72 | + const normalizedText = text ?? ''; |
| 73 | + const wordCount = splitWords(normalizedText, true).length; |
| 74 | + const shouldBlock = wordCount < minInterruptionWords; |
| 75 | + |
| 76 | + expect(normalizedText).toBe(''); |
| 77 | + expect(wordCount).toBe(0); |
| 78 | + expect(shouldBlock).toBe(true); |
| 79 | + }); |
| 80 | + |
| 81 | + it('should block interruption for undefined transcript with threshold 2', () => { |
| 82 | + const text: string | undefined = undefined; |
| 83 | + const minInterruptionWords = 2; |
| 84 | + |
| 85 | + const normalizedText = text ?? ''; |
| 86 | + const wordCount = splitWords(normalizedText, true).length; |
| 87 | + const shouldBlock = wordCount < minInterruptionWords; |
| 88 | + |
| 89 | + expect(normalizedText).toBe(''); |
| 90 | + expect(wordCount).toBe(0); |
| 91 | + expect(shouldBlock).toBe(true); |
| 92 | + }); |
| 93 | + |
| 94 | + it('should block interruption for single word with threshold 2', () => { |
| 95 | + const text = 'hello'; |
| 96 | + const minInterruptionWords = 2; |
| 97 | + |
| 98 | + const normalizedText = text ?? ''; |
| 99 | + const wordCount = splitWords(normalizedText, true).length; |
| 100 | + const shouldBlock = wordCount < minInterruptionWords; |
| 101 | + |
| 102 | + expect(normalizedText).toBe('hello'); |
| 103 | + expect(wordCount).toBe(1); |
| 104 | + expect(shouldBlock).toBe(true); |
| 105 | + }); |
| 106 | + |
| 107 | + it('should allow interruption when word count exactly meets threshold', () => { |
| 108 | + const text = 'hello world'; |
| 109 | + const minInterruptionWords = 2; |
| 110 | + |
| 111 | + const normalizedText = text ?? ''; |
| 112 | + const wordCount = splitWords(normalizedText, true).length; |
| 113 | + const shouldBlock = wordCount < minInterruptionWords; |
| 114 | + |
| 115 | + expect(normalizedText).toBe('hello world'); |
| 116 | + expect(wordCount).toBe(2); |
| 117 | + expect(shouldBlock).toBe(false); |
| 118 | + }); |
| 119 | + |
| 120 | + it('should allow interruption when word count exceeds threshold', () => { |
| 121 | + const text = 'hello this is a full sentence'; |
| 122 | + const minInterruptionWords = 2; |
| 123 | + |
| 124 | + const normalizedText = text ?? ''; |
| 125 | + const wordCount = splitWords(normalizedText, true).length; |
| 126 | + const shouldBlock = wordCount < minInterruptionWords; |
| 127 | + |
| 128 | + expect(normalizedText).toBe('hello this is a full sentence'); |
| 129 | + expect(wordCount).toBe(6); |
| 130 | + expect(shouldBlock).toBe(false); |
| 131 | + }); |
| 132 | + |
| 133 | + it('should apply consistent word counting logic in both methods', () => { |
| 134 | + const transcripts = ['', 'hello', 'hello world', 'this is a longer sentence']; |
| 135 | + const threshold = 2; |
| 136 | + |
| 137 | + transcripts.forEach((transcript) => { |
| 138 | + const text1 = transcript; |
| 139 | + const normalizedText1 = text1 ?? ''; |
| 140 | + const wordCount1 = splitWords(normalizedText1, true).length; |
| 141 | + const shouldBlock1 = wordCount1 < threshold; |
| 142 | + |
| 143 | + const wordCount2 = splitWords(transcript, true).length; |
| 144 | + const shouldBlock2 = wordCount2 < threshold; |
| 145 | + |
| 146 | + expect(wordCount1).toBe(wordCount2); |
| 147 | + expect(shouldBlock1).toBe(shouldBlock2); |
| 148 | + }); |
| 149 | + }); |
| 150 | + }); |
| 151 | +}); |
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