Just a whole lot of crap

tests/tui/components/screens/LogViewerScreen-refresh.test.js

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+const LogReaderService = require("../../../../src/services/logReader");
+
+// Mock the LogReaderService
+jest.mock("../../../../src/services/logReader");
+
+describe("LogViewerScreen - Auto Refresh", () => {
+	let mockLogReader;
+	let mockPaginatedData;
+
+	beforeEach(() => {
+		jest.clearAllMocks();
+		jest.useFakeTimers();
+
+		// Setup mock data
+		mockPaginatedData = {
+			entries: [
+				{
+					id: "entry_1",
+					type: "operation_start",
+					timestamp: new Date("2025-08-06T20:30:00Z"),
+					level: "INFO",
+					message: "Price Update Operation Started",
+					title: "Price Update Operation",
+					details: "Target Tag: summer-sale\nPrice Adjustment: -10%",
+				},
+			],
+			pagination: {
+				currentPage: 0,
+				pageSize: 10,
+				totalEntries: 1,
+				totalPages: 1,
+				hasNextPage: false,
+				hasPreviousPage: false,
+				startIndex: 1,
+				endIndex: 1,
+			},
+			filters: {
+				levelFilter: "ALL",
+				searchTerm: "",
+			},
+		};
+
+		// Setup LogReaderService mock
+		mockLogReader = {
+			getPaginatedEntries: jest.fn().mockResolvedValue(mockPaginatedData),
+			getLogStatistics: jest.fn().mockResolvedValue({}),
+			clearCache: jest.fn(),
+			watchFile: jest.fn().mockReturnValue(() => {}),
+		};
+
+		LogReaderService.mockImplementation(() => mockLogReader);
+	});
+
+	afterEach(() => {
+		jest.useRealTimers();
+	});
+
+	describe("File Watching", () => {
+		test("sets up file watching on mount", () => {
+			const logReader = new LogReaderService();
+
+			// Simulate component mount
+			const cleanup = logReader.watchFile(() => {});
+
+			expect(mockLogReader.watchFile).toHaveBeenCalled();
+			expect(typeof cleanup).toBe("function");
+		});
+
+		test("calls refresh callback when file changes", () => {
+			const logReader = new LogReaderService();
+			const mockCallback = jest.fn();
+
+			// Set up file watching
+			logReader.watchFile(mockCallback);
+
+			// Get the callback that was passed to watchFile
+			const watchCallback = mockLogReader.watchFile.mock.calls[0][0];
+
+			// Simulate file change
+			watchCallback();
+
+			expect(mockCallback).toHaveBeenCalled();
+		});
+
+		test("cleans up file watching on unmount", () => {
+			const logReader = new LogReaderService();
+			const mockCleanup = jest.fn();
+
+			mockLogReader.watchFile.mockReturnValue(mockCleanup);
+
+			const cleanup = logReader.watchFile(() => {});
+			cleanup();
+
+			expect(mockCleanup).toHaveBeenCalled();
+		});
+	});
+
+	describe("Periodic Refresh", () => {
+		test("sets up periodic refresh timer", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate component with auto-refresh enabled
+			const refreshEnabled = true;
+
+			if (refreshEnabled) {
+				// Set up a timer (simulating the component's useEffect)
+				const timer = setInterval(() => {
+					logReader.clearCache();
+				}, 30000);
+
+				// Verify that timer was created
+				expect(jest.getTimerCount()).toBeGreaterThan(0);
+
+				// Clean up
+				clearInterval(timer);
+			}
+		});
+
+		test("respects auto-refresh toggle", () => {
+			const logReader = new LogReaderService();
+
+			// When auto-refresh is disabled, no timers should be set
+			const refreshEnabled = false;
+
+			if (!refreshEnabled) {
+				expect(jest.getTimerCount()).toBe(0);
+			}
+		});
+
+		test("prevents refresh when already loading", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate loading state
+			const isLoading = true;
+			const isRefreshing = false;
+
+			// Periodic refresh should not trigger when loading
+			if (!isLoading && !isRefreshing) {
+				logReader.clearCache();
+				await logReader.getPaginatedEntries({});
+			}
+
+			// If loading, clearCache should not be called
+			if (isLoading) {
+				expect(mockLogReader.clearCache).not.toHaveBeenCalled();
+			}
+		});
+
+		test("prevents refresh when already refreshing", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate refreshing state
+			const isLoading = false;
+			const isRefreshing = true;
+
+			// Periodic refresh should not trigger when already refreshing
+			if (!isLoading && !isRefreshing) {
+				logReader.clearCache();
+				await logReader.getPaginatedEntries({});
+			}
+
+			// If refreshing, clearCache should not be called
+			if (isRefreshing) {
+				expect(mockLogReader.clearCache).not.toHaveBeenCalled();
+			}
+		});
+	});
+
+	describe("Cache Management", () => {
+		test("clears cache before refresh", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate manual refresh
+			logReader.clearCache();
+			await logReader.getPaginatedEntries({});
+
+			expect(mockLogReader.clearCache).toHaveBeenCalled();
+			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalled();
+		});
+
+		test("maintains cache for regular navigation", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate regular pagination (no cache clear)
+			await logReader.getPaginatedEntries({ page: 1 });
+
+			expect(mockLogReader.clearCache).not.toHaveBeenCalled();
+			expect(mockLogReader.getPaginatedEntries).toHaveBeenCalledWith(
+				expect.objectContaining({ page: 1 })
+			);
+		});
+	});
+
+	describe("Refresh State Management", () => {
+		test("distinguishes between loading and refreshing states", async () => {
+			const logReader = new LogReaderService();
+
+			// Initial load should be "loading"
+			const isInitialLoad = true;
+			const isAutoRefresh = false;
+
+			if (isInitialLoad && !isAutoRefresh) {
+				// This would set loading state
+				expect(true).toBe(true); // Placeholder for state check
+			}
+
+			// Auto refresh should be "refreshing"
+			if (!isInitialLoad && isAutoRefresh) {
+				// This would set refreshing state
+				expect(true).toBe(true); // Placeholder for state check
+			}
+		});
+
+		test("updates last refresh timestamp", async () => {
+			const logReader = new LogReaderService();
+			const beforeRefresh = new Date();
+
+			// Simulate refresh
+			await logReader.getPaginatedEntries({});
+
+			const afterRefresh = new Date();
+
+			// Last refresh should be between before and after
+			expect(afterRefresh.getTime()).toBeGreaterThanOrEqual(
+				beforeRefresh.getTime()
+			);
+		});
+	});
+
+	describe("Performance Optimization", () => {
+		test("avoids unnecessary refreshes", () => {
+			const logReader = new LogReaderService();
+
+			// Multiple rapid file change events should be handled efficiently
+			const watchCallback = mockLogReader.watchFile.mock.calls[0]?.[0];
+
+			if (watchCallback) {
+				// Simulate rapid file changes
+				watchCallback();
+				watchCallback();
+				watchCallback();
+
+				// Should handle gracefully without excessive API calls
+				expect(mockLogReader.watchFile).toHaveBeenCalledTimes(1);
+			}
+		});
+
+		test("handles refresh errors gracefully", async () => {
+			const logReader = new LogReaderService();
+
+			// Mock refresh failure
+			mockLogReader.getPaginatedEntries.mockRejectedValueOnce(
+				new Error("Refresh failed")
+			);
+
+			try {
+				await logReader.getPaginatedEntries({});
+			} catch (error) {
+				expect(error.message).toBe("Refresh failed");
+			}
+
+			// Should still be able to retry
+			mockLogReader.getPaginatedEntries.mockResolvedValueOnce(
+				mockPaginatedData
+			);
+			const result = await logReader.getPaginatedEntries({});
+			expect(result).toEqual(mockPaginatedData);
+		});
+
+		test("maintains selection during refresh", async () => {
+			const logReader = new LogReaderService();
+
+			// Simulate refresh with current selection
+			const currentSelection = 0;
+			const result = await logReader.getPaginatedEntries({});
+
+			// Selection should be maintained if still valid
+			if (currentSelection < result.entries.length) {
+				expect(currentSelection).toBeLessThan(result.entries.length);
+			}
+		});
+	});
+
+	describe("Auto-refresh Toggle", () => {
+		test("enables auto-refresh by default", () => {
+			// Auto-refresh should be enabled by default
+			const defaultAutoRefresh = true;
+			expect(defaultAutoRefresh).toBe(true);
+		});
+
+		test("allows toggling auto-refresh", () => {
+			let autoRefresh = true;
+
+			// Toggle off
+			autoRefresh = !autoRefresh;
+			expect(autoRefresh).toBe(false);
+
+			// Toggle on
+			autoRefresh = !autoRefresh;
+			expect(autoRefresh).toBe(true);
+		});
+
+		test("stops file watching when auto-refresh is disabled", () => {
+			const logReader = new LogReaderService();
+			const autoRefresh = false;
+
+			// When auto-refresh is disabled, file watching should not be set up
+			if (autoRefresh) {
+				logReader.watchFile(() => {});
+				expect(mockLogReader.watchFile).toHaveBeenCalled();
+			} else {
+				expect(mockLogReader.watchFile).not.toHaveBeenCalled();
+			}
+		});
+
+		test("stops periodic refresh when auto-refresh is disabled", () => {
+			const autoRefresh = false;
+
+			// When auto-refresh is disabled, no periodic timers should be active
+			if (!autoRefresh) {
+				expect(jest.getTimerCount()).toBe(0);
+			}
+		});
+	});
+
+	describe("Visual Indicators", () => {
+		test("shows different states in status bar", () => {
+			// Test different status messages
+			const states = [
+				{ loading: true, refreshing: false, expected: "Loading..." },
+				{ loading: false, refreshing: true, expected: "Refreshing..." },
+				{ loading: false, refreshing: false, expected: "Filter status" },
+			];
+
+			states.forEach(({ loading, refreshing, expected }) => {
+				let statusMessage;
+				if (loading) {
+					statusMessage = "Loading...";
+				} else if (refreshing) {
+					statusMessage = "Refreshing...";
+				} else {
+					statusMessage = "Filter status";
+				}
+
+				expect(statusMessage).toContain(expected.split(" ")[0]);
+			});
+		});
+
+		test("displays auto-refresh status", () => {
+			const autoRefresh = true;
+			const statusText = `Auto: ${autoRefresh ? "ON" : "OFF"}`;
+
+			expect(statusText).toBe("Auto: ON");
+		});
+
+		test("displays last refresh time", () => {
+			const lastRefresh = new Date();
+			const timeString = lastRefresh.toLocaleTimeString();
+
+			expect(timeString).toMatch(/\d{1,2}:\d{2}:\d{2}/);
+		});
+	});
+
+	describe("Error Handling", () => {
+		test("handles file watching errors gracefully", () => {
+			const logReader = new LogReaderService();
+
+			// Mock file watching error
+			mockLogReader.watchFile.mockImplementation(() => {
+				throw new Error("File watching failed");
+			});
+
+			// Should not crash the application
+			expect(() => {
+				try {
+					logReader.watchFile(() => {});
+				} catch (error) {
+					// Error should be handled gracefully
+					expect(error.message).toBe("File watching failed");
+				}
+			}).not.toThrow();
+		});
+
+		test("continues working after refresh errors", async () => {
+			const logReader = new LogReaderService();
+
+			// Mock temporary error
+			mockLogReader.getPaginatedEntries
+				.mockRejectedValueOnce(new Error("Temporary error"))
+				.mockResolvedValueOnce(mockPaginatedData);
+
+			// First call fails
+			try {
+				await logReader.getPaginatedEntries({});
+			} catch (error) {
+				expect(error.message).toBe("Temporary error");
+			}
+
+			// Second call succeeds
+			const result = await logReader.getPaginatedEntries({});
+			expect(result).toEqual(mockPaginatedData);
+		});
+	});
+});