Test(data): add test coverage for getEvents utility (#989)

test(data): add test coverage for getEvents utility

re #986

packages/data/tests/getEvents.test.ts

@@ -0,0 +1,108 @@
+import { Contract, EventLog } from "ethers/contract"
+import getEvents from "../src/getEvents"
+
+jest.mock("ethers/contract", () => ({
+    __esModule: true,
+    Contract: jest.fn(),
+    EventLog: jest.fn()
+}))
+
+describe("getEvents", () => {
+    let mockContract: jest.Mocked<Contract>
+
+    beforeEach(() => {
+        mockContract = {
+            filters: {
+                TestEvent: jest.fn()
+            },
+            queryFilter: jest.fn()
+        } as any
+    })
+
+    describe("# getEvents", () => {
+        it("should fetch events with basic parameters", async () => {
+            const mockEvents = [
+                {
+                    args: ["arg1", "arg2"],
+                    blockNumber: 123
+                },
+                {
+                    args: ["arg3", "arg4"],
+                    blockNumber: 124
+                }
+            ] as EventLog[]
+
+            mockContract.queryFilter.mockResolvedValueOnce(mockEvents)
+
+            const result = await getEvents(mockContract, "TestEvent")
+
+            expect(mockContract.filters.TestEvent).toHaveBeenCalled()
+            expect(mockContract.queryFilter).toHaveBeenCalled()
+            expect(result).toEqual([
+                ["arg1", "arg2", 123],
+                ["arg3", "arg4", 124]
+            ])
+        })
+
+        it("should handle filter arguments", async () => {
+            const filterArgs = ["arg1", "arg2"]
+            const mockEvents = [
+                {
+                    args: ["arg1", "arg2"],
+                    blockNumber: 123
+                }
+            ] as EventLog[]
+
+            mockContract.queryFilter.mockResolvedValueOnce(mockEvents)
+
+            await getEvents(mockContract, "TestEvent", filterArgs)
+
+            expect(mockContract.filters.TestEvent).toHaveBeenCalledWith(...filterArgs)
+        })
+
+        it("should use startBlock parameter", async () => {
+            const startBlock = 1000
+            const mockEvents = [
+                {
+                    args: ["arg1"],
+                    blockNumber: 1001
+                }
+            ] as EventLog[]
+
+            mockContract.queryFilter.mockResolvedValueOnce(mockEvents)
+
+            await getEvents(mockContract, "TestEvent", [], startBlock)
+
+            expect(mockContract.queryFilter).toHaveBeenCalledWith(undefined, startBlock)
+        })
+
+        it("should handle empty events array", async () => {
+            mockContract.queryFilter.mockResolvedValueOnce([])
+
+            const result = await getEvents(mockContract, "TestEvent")
+
+            expect(result).toEqual([])
+        })
+
+        it("should handle undefined filterArgs gracefully", async () => {
+            const mockEvents = [
+                {
+                    args: ["arg1"],
+                    blockNumber: 101
+                }
+            ] as EventLog[]
+
+            mockContract.queryFilter.mockResolvedValueOnce(mockEvents)
+
+            await getEvents(mockContract, "TestEvent", undefined)
+
+            expect(mockContract.filters.TestEvent).toHaveBeenCalledWith()
+        })
+
+        it("should handle contract errors", async () => {
+            mockContract.queryFilter.mockRejectedValue(new Error("Contract error"))
+
+            await expect(getEvents(mockContract, "TestEvent")).rejects.toThrow("Contract error")
+        })
+    })
+})