Improve combineApiRequests performance

src/shared/__tests__/combineApiRequests.test.ts

@@ -0,0 +1,323 @@
+import { combineApiRequests } from "../combineApiRequests"
+import { ClineMessage } from "../ExtensionMessage"
+
+describe("combineApiRequests", () => {
+	// Helper function to create a basic api_req_started message
+	const createStartMessage = (text: string = '{"request":"GET /api/data"}', ts: number = 1000): ClineMessage => ({
+		type: "say",
+		say: "api_req_started",
+		text,
+		ts,
+	})
+
+	// Helper function to create a basic api_req_finished message
+	const createFinishMessage = (text: string = '{"cost":0.005}', ts: number = 1001): ClineMessage => ({
+		type: "say",
+		say: "api_req_finished",
+		text,
+		ts,
+	})
+
+	// Helper function to create a non-API message
+	const createOtherMessage = (
+		say: "text" | "task" | "error" | "command" = "text",
+		text: string = "Hello world",
+		ts: number = 999,
+	): ClineMessage => ({
+		type: "say",
+		say,
+		text,
+		ts,
+	})
+
+	describe("Basic functionality", () => {
+		it("should combine a pair of api_req_started and api_req_finished messages", () => {
+			const messages: ClineMessage[] = [createStartMessage(), createFinishMessage()]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the combined one)
+			expect(result).toHaveLength(1)
+
+			// The combined message should have the properties of the start message
+			expect(result[0].type).toBe("say")
+			expect(result[0].say).toBe("api_req_started")
+			expect(result[0].ts).toBe(1000)
+
+			// The text should be a JSON string with combined properties
+			const parsedText = JSON.parse(result[0].text || "{}")
+			expect(parsedText).toEqual({
+				request: "GET /api/data",
+				cost: 0.005,
+			})
+		})
+
+		it("should handle multiple pairs of API request messages", () => {
+			const messages: ClineMessage[] = [
+				createStartMessage('{"request":"GET /api/data1"}', 1000),
+				createFinishMessage('{"cost":0.005}', 1001),
+				createStartMessage('{"request":"GET /api/data2"}', 2000),
+				createFinishMessage('{"cost":0.007}', 2001),
+			]
+
+			const result = combineApiRequests(messages)
+
+			// Should have two messages (the combined ones)
+			expect(result).toHaveLength(2)
+
+			// Check first combined message
+			const parsedText1 = JSON.parse(result[0].text || "{}")
+			expect(parsedText1).toEqual({
+				request: "GET /api/data1",
+				cost: 0.005,
+			})
+
+			// Check second combined message
+			const parsedText2 = JSON.parse(result[1].text || "{}")
+			expect(parsedText2).toEqual({
+				request: "GET /api/data2",
+				cost: 0.007,
+			})
+		})
+
+		it("should preserve non-API messages", () => {
+			const otherMessage = createOtherMessage()
+			const messages: ClineMessage[] = [otherMessage, createStartMessage(), createFinishMessage()]
+
+			const result = combineApiRequests(messages)
+
+			// Should have two messages (the other message and the combined one)
+			expect(result).toHaveLength(2)
+
+			// The first message should be unchanged
+			expect(result[0]).toEqual(otherMessage)
+		})
+
+		it("should handle interleaved API and non-API messages", () => {
+			const otherMessage1 = createOtherMessage("text", "Message 1", 999)
+			const otherMessage2 = createOtherMessage("text", "Message 2", 1500)
+
+			const messages: ClineMessage[] = [
+				otherMessage1,
+				createStartMessage('{"request":"GET /api/data1"}', 1000),
+				createFinishMessage('{"cost":0.005}', 1001),
+				otherMessage2,
+				createStartMessage('{"request":"GET /api/data2"}', 2000),
+				createFinishMessage('{"cost":0.007}', 2001),
+			]
+
+			const result = combineApiRequests(messages)
+
+			// Should have four messages (two other messages and two combined ones)
+			expect(result).toHaveLength(4)
+
+			// Check the order and content of messages
+			expect(result[0]).toEqual(otherMessage1)
+
+			const parsedText1 = JSON.parse(result[1].text || "{}")
+			expect(parsedText1).toEqual({
+				request: "GET /api/data1",
+				cost: 0.005,
+			})
+
+			expect(result[2]).toEqual(otherMessage2)
+
+			const parsedText2 = JSON.parse(result[3].text || "{}")
+			expect(parsedText2).toEqual({
+				request: "GET /api/data2",
+				cost: 0.007,
+			})
+		})
+	})
+
+	describe("Edge cases", () => {
+		it("should handle empty messages array", () => {
+			const result = combineApiRequests([])
+			expect(result).toEqual([])
+		})
+
+		it("should keep api_req_started message if no matching api_req_finished is found", () => {
+			const startMessage = createStartMessage()
+			const messages: ClineMessage[] = [startMessage]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the original start message)
+			expect(result).toHaveLength(1)
+			expect(result[0]).toEqual(startMessage)
+		})
+
+		it("should handle missing text field in api_req_started", () => {
+			const startMessage: ClineMessage = {
+				type: "say",
+				say: "api_req_started",
+				ts: 1000,
+				// text field is missing
+			}
+			const finishMessage = createFinishMessage()
+
+			const messages: ClineMessage[] = [startMessage, finishMessage]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the combined one)
+			expect(result).toHaveLength(1)
+
+			// The text should be a JSON string with only the finish message properties
+			const parsedText = JSON.parse(result[0].text || "{}")
+			expect(parsedText).toEqual({
+				cost: 0.005,
+			})
+		})
+
+		it("should handle missing text field in api_req_finished", () => {
+			const startMessage = createStartMessage()
+			const finishMessage: ClineMessage = {
+				type: "say",
+				say: "api_req_finished",
+				ts: 1001,
+				// text field is missing
+			}
+
+			const messages: ClineMessage[] = [startMessage, finishMessage]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the combined one)
+			expect(result).toHaveLength(1)
+
+			// The text should be a JSON string with only the start message properties
+			const parsedText = JSON.parse(result[0].text || "{}")
+			expect(parsedText).toEqual({
+				request: "GET /api/data",
+			})
+		})
+
+		it("should use the first api_req_finished message if multiple matches exist", () => {
+			const messages: ClineMessage[] = [
+				createStartMessage('{"request":"GET /api/data"}', 1000),
+				createFinishMessage('{"cost":0.005}', 1001),
+				createFinishMessage('{"cost":0.007}', 1002), // This should be ignored
+			]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the combined one)
+			expect(result).toHaveLength(1)
+
+			// The text should be a JSON string with combined properties from the first finish message
+			const parsedText = JSON.parse(result[0].text || "{}")
+			expect(parsedText).toEqual({
+				request: "GET /api/data",
+				cost: 0.005, // Should use the first finish message's cost
+			})
+		})
+
+		it("should handle multiple start messages with some missing finish messages", () => {
+			const messages: ClineMessage[] = [
+				createStartMessage('{"request":"GET /api/data1"}', 1000),
+				createFinishMessage('{"cost":0.005}', 1001),
+				createStartMessage('{"request":"GET /api/data2"}', 2000),
+				// No finish message for the second start message
+			]
+
+			const result = combineApiRequests(messages)
+
+			// Should have two messages (one combined and one original start message)
+			expect(result).toHaveLength(2)
+
+			// Check first combined message
+			const parsedText1 = JSON.parse(result[0].text || "{}")
+			expect(parsedText1).toEqual({
+				request: "GET /api/data1",
+				cost: 0.005,
+			})
+
+			// Check second message (should be the original start message)
+			expect(result[1].say).toBe("api_req_started")
+			const parsedText2 = JSON.parse(result[1].text || "{}")
+			expect(parsedText2).toEqual({
+				request: "GET /api/data2",
+			})
+		})
+
+		it("should preserve additional properties in the messages", () => {
+			const startMessage: ClineMessage = {
+				type: "say",
+				say: "api_req_started",
+				text: '{"request":"GET /api/data"}',
+				ts: 1000,
+				reasoning: "This is a test",
+				partial: false,
+			}
+
+			const finishMessage: ClineMessage = {
+				type: "say",
+				say: "api_req_finished",
+				text: '{"cost":0.005}',
+				ts: 1001,
+			}
+
+			const messages: ClineMessage[] = [startMessage, finishMessage]
+
+			const result = combineApiRequests(messages)
+
+			// Should have one message (the combined one)
+			expect(result).toHaveLength(1)
+
+			// The combined message should preserve additional properties from the start message
+			expect(result[0].reasoning).toBe("This is a test")
+			expect(result[0].partial).toBe(false)
+		})
+	})
+
+	describe("Bug verification", () => {
+		it("should correctly replace api_req_started messages with combined ones", () => {
+			// Create a scenario where we can verify the replacement logic
+			const otherMessage = createOtherMessage()
+			const startMessage1 = createStartMessage('{"request":"GET /api/data1"}', 1000)
+			const finishMessage1 = createFinishMessage('{"cost":0.005}', 1001)
+			const startMessage2 = createStartMessage('{"request":"GET /api/data2"}', 2000)
+			// No finish message for the second start
+
+			const messages: ClineMessage[] = [otherMessage, startMessage1, finishMessage1, startMessage2]
+
+			const result = combineApiRequests(messages)
+
+			// Should have three messages (other, combined, and the orphaned start)
+			expect(result).toHaveLength(3)
+
+			// First message should be unchanged
+			expect(result[0]).toEqual(otherMessage)
+
+			// Second message should be a combined message with the same ts as startMessage1
+			expect(result[1].ts).toBe(startMessage1.ts)
+			expect(result[1].say).toBe("api_req_started")
+			const parsedText1 = JSON.parse(result[1].text || "{}")
+			expect(parsedText1).toEqual({
+				request: "GET /api/data1",
+				cost: 0.005,
+			})
+
+			// Third message should be the original startMessage2
+			expect(result[2]).toEqual(startMessage2)
+		})
+
+		it("should filter out all api_req_finished messages", () => {
+			const messages: ClineMessage[] = [
+				createOtherMessage(),
+				createStartMessage(),
+				createFinishMessage(),
+				createFinishMessage('{"cost":0.007}', 2000), // Orphaned finish message
+			]
+
+			const result = combineApiRequests(messages)
+
+			// Should have two messages (other and combined), no finish messages
+			expect(result).toHaveLength(2)
+
+			// No message should have say="api_req_finished"
+			expect(result.some((msg) => msg.say === "api_req_finished")).toBe(false)
+		})
+	})
+})