|
| 1 | +/** |
| 2 | + * Test for the specific race condition bug where command messages |
| 3 | + * with partial=true never transition to partial=false |
| 4 | + * |
| 5 | + * Bug scenario: |
| 6 | + * 1. Extension sends messageUpdated with partial=false |
| 7 | + * 2. Extension sends state update with stale partial=true version |
| 8 | + * 3. CLI should keep the partial=false version, not revert to partial=true |
| 9 | + */ |
| 10 | + |
| 11 | +import { describe, it, expect, beforeEach } from "vitest" |
| 12 | +import { createStore } from "jotai" |
| 13 | +import type { ExtensionChatMessage, ExtensionState } from "../../../types/messages.js" |
| 14 | +import { |
| 15 | + chatMessagesAtom, |
| 16 | + updateExtensionStateAtom, |
| 17 | + updateChatMessageByTsAtom, |
| 18 | + streamingMessagesSetAtom, |
| 19 | +} from "../extension.js" |
| 20 | + |
| 21 | +describe("Partial Race Condition Bug Fix", () => { |
| 22 | + let store: ReturnType<typeof createStore> |
| 23 | + |
| 24 | + beforeEach(() => { |
| 25 | + store = createStore() |
| 26 | + }) |
| 27 | + |
| 28 | + it("should not revert partial=false to partial=true when stale state arrives", () => { |
| 29 | + // Step 1: Initial state with a command message (partial=true) |
| 30 | + const initialState: ExtensionState = { |
| 31 | + version: "1.0.0", |
| 32 | + apiConfiguration: {}, |
| 33 | + chatMessages: [ |
| 34 | + { |
| 35 | + ts: 1761239614416, |
| 36 | + type: "ask", |
| 37 | + ask: "command", |
| 38 | + text: "git status", |
| 39 | + partial: true, |
| 40 | + }, |
| 41 | + ], |
| 42 | + mode: "code", |
| 43 | + customModes: [], |
| 44 | + taskHistoryFullLength: 0, |
| 45 | + taskHistoryVersion: 0, |
| 46 | + renderContext: "cli", |
| 47 | + telemetrySetting: "disabled", |
| 48 | + } |
| 49 | + |
| 50 | + store.set(updateExtensionStateAtom, initialState) |
| 51 | + |
| 52 | + // Verify message is tracked as streaming |
| 53 | + expect(store.get(streamingMessagesSetAtom).has(1761239614416)).toBe(true) |
| 54 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(true) |
| 55 | + |
| 56 | + // Step 2: Extension sends messageUpdated with partial=false (command complete) |
| 57 | + const completedMessage: ExtensionChatMessage = { |
| 58 | + ts: 1761239614416, |
| 59 | + type: "ask", |
| 60 | + ask: "command", |
| 61 | + text: "git status", |
| 62 | + partial: false, |
| 63 | + } |
| 64 | + |
| 65 | + store.set(updateChatMessageByTsAtom, completedMessage) |
| 66 | + |
| 67 | + // Verify message is now complete |
| 68 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(false) |
| 69 | + expect(store.get(streamingMessagesSetAtom).has(1761239614416)).toBe(false) |
| 70 | + |
| 71 | + // Step 3: Stale state update arrives with partial=true (race condition) |
| 72 | + const staleState: ExtensionState = { |
| 73 | + version: "1.0.0", |
| 74 | + apiConfiguration: {}, |
| 75 | + chatMessages: [ |
| 76 | + { |
| 77 | + ts: 1761239614416, |
| 78 | + type: "ask", |
| 79 | + ask: "command", |
| 80 | + text: "git status", |
| 81 | + partial: true, // Stale partial flag |
| 82 | + }, |
| 83 | + ], |
| 84 | + mode: "code", |
| 85 | + customModes: [], |
| 86 | + taskHistoryFullLength: 0, |
| 87 | + taskHistoryVersion: 0, |
| 88 | + renderContext: "cli", |
| 89 | + telemetrySetting: "disabled", |
| 90 | + } |
| 91 | + |
| 92 | + store.set(updateExtensionStateAtom, staleState) |
| 93 | + |
| 94 | + // BUG FIX: Message should remain partial=false, not revert to partial=true |
| 95 | + const messages = store.get(chatMessagesAtom) |
| 96 | + expect(messages).toHaveLength(1) |
| 97 | + expect(messages[0]?.partial).toBe(false) // Should stay false! |
| 98 | + expect(messages[0]?.text).toBe("git status") |
| 99 | + }) |
| 100 | + |
| 101 | + it("should auto-complete orphaned partial ask when subsequent messages arrive (CLI workaround)", () => { |
| 102 | + // Simulate the extension bug: partial ask message followed by other messages |
| 103 | + // without ever sending a partial=false update |
| 104 | + const stateWithOrphanedPartial: ExtensionState = { |
| 105 | + version: "1.0.0", |
| 106 | + apiConfiguration: {}, |
| 107 | + chatMessages: [ |
| 108 | + { |
| 109 | + ts: 1000, |
| 110 | + type: "ask", |
| 111 | + ask: "command", |
| 112 | + text: "git status", |
| 113 | + partial: true, // Orphaned - never completed by extension |
| 114 | + }, |
| 115 | + { |
| 116 | + ts: 2000, |
| 117 | + type: "say", |
| 118 | + say: "checkpoint_saved", |
| 119 | + text: "abc123", |
| 120 | + }, |
| 121 | + { |
| 122 | + ts: 3000, |
| 123 | + type: "say", |
| 124 | + say: "text", |
| 125 | + text: "Command executed", |
| 126 | + }, |
| 127 | + ], |
| 128 | + mode: "code", |
| 129 | + customModes: [], |
| 130 | + taskHistoryFullLength: 0, |
| 131 | + taskHistoryVersion: 0, |
| 132 | + renderContext: "cli", |
| 133 | + telemetrySetting: "disabled", |
| 134 | + } |
| 135 | + |
| 136 | + store.set(updateExtensionStateAtom, stateWithOrphanedPartial) |
| 137 | + |
| 138 | + // CLI should auto-complete the orphaned partial ask |
| 139 | + const messages = store.get(chatMessagesAtom) |
| 140 | + expect(messages).toHaveLength(3) |
| 141 | + expect(messages[0]?.partial).toBe(false) // Auto-completed! |
| 142 | + expect(messages[0]?.ask).toBe("command") |
| 143 | + }) |
| 144 | + |
| 145 | + it("should handle the race condition for any ask message type", () => { |
| 146 | + // Test with followup message |
| 147 | + const initialState: ExtensionState = { |
| 148 | + version: "1.0.0", |
| 149 | + apiConfiguration: {}, |
| 150 | + chatMessages: [ |
| 151 | + { |
| 152 | + ts: 2000, |
| 153 | + type: "ask", |
| 154 | + ask: "followup", |
| 155 | + text: '{"question":"What should I do?"}', |
| 156 | + partial: true, |
| 157 | + }, |
| 158 | + ], |
| 159 | + mode: "code", |
| 160 | + customModes: [], |
| 161 | + taskHistoryFullLength: 0, |
| 162 | + taskHistoryVersion: 0, |
| 163 | + renderContext: "cli", |
| 164 | + telemetrySetting: "disabled", |
| 165 | + } |
| 166 | + |
| 167 | + store.set(updateExtensionStateAtom, initialState) |
| 168 | + |
| 169 | + // Complete the message via messageUpdated |
| 170 | + const completedMessage: ExtensionChatMessage = { |
| 171 | + ts: 2000, |
| 172 | + type: "ask", |
| 173 | + ask: "followup", |
| 174 | + text: '{"question":"What should I do?","suggest":[{"answer":"Option 1"},{"answer":"Option 2"}]}', |
| 175 | + partial: false, |
| 176 | + } |
| 177 | + |
| 178 | + store.set(updateChatMessageByTsAtom, completedMessage) |
| 179 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(false) |
| 180 | + |
| 181 | + // Stale state arrives |
| 182 | + const staleState: ExtensionState = { |
| 183 | + version: "1.0.0", |
| 184 | + apiConfiguration: {}, |
| 185 | + chatMessages: [ |
| 186 | + { |
| 187 | + ts: 2000, |
| 188 | + type: "ask", |
| 189 | + ask: "followup", |
| 190 | + text: '{"question":"What should I do?"}', |
| 191 | + partial: true, |
| 192 | + }, |
| 193 | + ], |
| 194 | + mode: "code", |
| 195 | + customModes: [], |
| 196 | + taskHistoryFullLength: 0, |
| 197 | + taskHistoryVersion: 0, |
| 198 | + renderContext: "cli", |
| 199 | + telemetrySetting: "disabled", |
| 200 | + } |
| 201 | + |
| 202 | + store.set(updateExtensionStateAtom, staleState) |
| 203 | + |
| 204 | + // Should keep the completed version |
| 205 | + const messages = store.get(chatMessagesAtom) |
| 206 | + expect(messages[0]?.partial).toBe(false) |
| 207 | + expect(messages[0]?.text).toContain("suggest") |
| 208 | + }) |
| 209 | + |
| 210 | + it("should still allow legitimate partial updates during active streaming", () => { |
| 211 | + // Initial state |
| 212 | + const initialState: ExtensionState = { |
| 213 | + version: "1.0.0", |
| 214 | + apiConfiguration: {}, |
| 215 | + chatMessages: [ |
| 216 | + { |
| 217 | + ts: 3000, |
| 218 | + type: "ask", |
| 219 | + ask: "command", |
| 220 | + text: "npm", |
| 221 | + partial: true, |
| 222 | + }, |
| 223 | + ], |
| 224 | + mode: "code", |
| 225 | + customModes: [], |
| 226 | + taskHistoryFullLength: 0, |
| 227 | + taskHistoryVersion: 0, |
| 228 | + renderContext: "cli", |
| 229 | + telemetrySetting: "disabled", |
| 230 | + } |
| 231 | + |
| 232 | + store.set(updateExtensionStateAtom, initialState) |
| 233 | + |
| 234 | + // Streaming update with more content |
| 235 | + const streamingUpdate: ExtensionChatMessage = { |
| 236 | + ts: 3000, |
| 237 | + type: "ask", |
| 238 | + ask: "command", |
| 239 | + text: "npm install", |
| 240 | + partial: true, |
| 241 | + } |
| 242 | + |
| 243 | + store.set(updateChatMessageByTsAtom, streamingUpdate) |
| 244 | + expect(store.get(chatMessagesAtom)[0]?.text).toBe("npm install") |
| 245 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(true) |
| 246 | + |
| 247 | + // Another streaming update with even more content |
| 248 | + const streamingUpdate2: ExtensionChatMessage = { |
| 249 | + ts: 3000, |
| 250 | + type: "ask", |
| 251 | + ask: "command", |
| 252 | + text: "npm install express", |
| 253 | + partial: true, |
| 254 | + } |
| 255 | + |
| 256 | + store.set(updateChatMessageByTsAtom, streamingUpdate2) |
| 257 | + expect(store.get(chatMessagesAtom)[0]?.text).toBe("npm install express") |
| 258 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(true) |
| 259 | + |
| 260 | + // State update with shorter content should be rejected (streaming protection) |
| 261 | + const staleState: ExtensionState = { |
| 262 | + version: "1.0.0", |
| 263 | + apiConfiguration: {}, |
| 264 | + chatMessages: [ |
| 265 | + { |
| 266 | + ts: 3000, |
| 267 | + type: "ask", |
| 268 | + ask: "command", |
| 269 | + text: "npm", |
| 270 | + partial: false, |
| 271 | + }, |
| 272 | + ], |
| 273 | + mode: "code", |
| 274 | + customModes: [], |
| 275 | + taskHistoryFullLength: 0, |
| 276 | + taskHistoryVersion: 0, |
| 277 | + renderContext: "cli", |
| 278 | + telemetrySetting: "disabled", |
| 279 | + } |
| 280 | + |
| 281 | + store.set(updateExtensionStateAtom, staleState) |
| 282 | + |
| 283 | + // Should keep the longer streaming version |
| 284 | + expect(store.get(chatMessagesAtom)[0]?.text).toBe("npm install express") |
| 285 | + expect(store.get(chatMessagesAtom)[0]?.partial).toBe(true) |
| 286 | + }) |
| 287 | +}) |
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