test: add unit tests for diagnostics with the scenario we fixed included

Author: daniel-lxs

src/integrations/diagnostics/__tests__/diagnostics.test.ts

@@ -0,0 +1,369 @@
+import * as vscode from "vscode"
+import { diagnosticsToProblemsString } from ".."
+
+// Mock vscode module
+jest.mock("vscode", () => ({
+	Uri: {
+		file: jest.fn((path) => ({
+			fsPath: path,
+			toString: jest.fn(() => path),
+		})),
+	},
+	Diagnostic: jest.fn().mockImplementation((range, message, severity) => ({
+		range,
+		message,
+		severity,
+		source: "test",
+	})),
+	Range: jest.fn().mockImplementation((startLine, startChar, endLine, endChar) => ({
+		start: { line: startLine, character: startChar },
+		end: { line: endLine, character: endChar },
+	})),
+	DiagnosticSeverity: {
+		Error: 0,
+		Warning: 1,
+		Information: 2,
+		Hint: 3,
+	},
+	FileType: {
+		Unknown: 0,
+		File: 1,
+		Directory: 2,
+		SymbolicLink: 64,
+	},
+	workspace: {
+		fs: {
+			stat: jest.fn(),
+		},
+		openTextDocument: jest.fn(),
+	},
+}))
+
+describe("diagnosticsToProblemsString", () => {
+	beforeEach(() => {
+		jest.clearAllMocks()
+	})
+
+	it("should filter diagnostics by severity and include correct labels", async () => {
+		// Mock file URI
+		const fileUri = vscode.Uri.file("/path/to/file.ts")
+
+		// Create diagnostics with different severities
+		const diagnostics = [
+			new vscode.Diagnostic(new vscode.Range(0, 0, 0, 10), "Error message", vscode.DiagnosticSeverity.Error),
+			new vscode.Diagnostic(new vscode.Range(1, 0, 1, 10), "Warning message", vscode.DiagnosticSeverity.Warning),
+			new vscode.Diagnostic(new vscode.Range(2, 0, 2, 10), "Info message", vscode.DiagnosticSeverity.Information),
+			new vscode.Diagnostic(new vscode.Range(3, 0, 3, 10), "Hint message", vscode.DiagnosticSeverity.Hint),
+		]
+
+		// Mock fs.stat to return file type
+		const mockStat = {
+			type: vscode.FileType.File,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock document content
+		const mockDocument = {
+			lineAt: jest.fn((line) => ({
+				text: `Line ${line + 1} content`,
+			})),
+		}
+		vscode.workspace.openTextDocument = jest.fn().mockResolvedValue(mockDocument)
+
+		// Test with Error and Warning severities only
+		const result = await diagnosticsToProblemsString(
+			[[fileUri, diagnostics]],
+			[vscode.DiagnosticSeverity.Error, vscode.DiagnosticSeverity.Warning],
+			"/path/to",
+		)
+
+		// Verify only Error and Warning diagnostics are included
+		expect(result).toContain("Error message")
+		expect(result).toContain("Warning message")
+		expect(result).not.toContain("Info message")
+		expect(result).not.toContain("Hint message")
+
+		// Verify correct severity labels are used
+		expect(result).toContain("[test Error]")
+		expect(result).toContain("[test Warning]")
+		expect(result).not.toContain("[test Information]")
+		expect(result).not.toContain("[test Hint]")
+
+		// Verify line content is included
+		expect(result).toContain("Line 1 content")
+		expect(result).toContain("Line 2 content")
+	})
+
+	it("should handle directory URIs correctly without attempting to open as document", async () => {
+		// Mock directory URI
+		const dirUri = vscode.Uri.file("/path/to/directory/")
+
+		// Mock diagnostic for directory
+		const diagnostic = new vscode.Diagnostic(
+			new vscode.Range(0, 0, 0, 10),
+			"Directory diagnostic message",
+			vscode.DiagnosticSeverity.Error,
+		)
+
+		// Mock fs.stat to return directory type
+		const mockStat = {
+			type: vscode.FileType.Directory,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock openTextDocument to ensure it's not called
+		vscode.workspace.openTextDocument = jest.fn()
+
+		// Call the function
+		const result = await diagnosticsToProblemsString(
+			[[dirUri, [diagnostic]]],
+			[vscode.DiagnosticSeverity.Error],
+			"/path/to",
+		)
+
+		// Verify fs.stat was called with the directory URI
+		expect(vscode.workspace.fs.stat).toHaveBeenCalledWith(dirUri)
+
+		// Verify openTextDocument was not called
+		expect(vscode.workspace.openTextDocument).not.toHaveBeenCalled()
+
+		// Verify the output contains the expected directory indicator
+		expect(result).toContain("(directory)")
+		expect(result).toContain("Directory diagnostic message")
+		expect(result).toMatch(/directory\n- \[test Error\] 1 \| \(directory\) : Directory diagnostic message/)
+	})
+
+	it("should correctly handle multiple diagnostics for the same file", async () => {
+		// Mock file URI
+		const fileUri = vscode.Uri.file("/path/to/file.ts")
+
+		// Create multiple diagnostics for the same file
+		const diagnostics = [
+			new vscode.Diagnostic(new vscode.Range(4, 0, 4, 10), "Later line error", vscode.DiagnosticSeverity.Error),
+			new vscode.Diagnostic(
+				new vscode.Range(0, 0, 0, 10),
+				"First line warning",
+				vscode.DiagnosticSeverity.Warning,
+			),
+			new vscode.Diagnostic(
+				new vscode.Range(2, 0, 2, 10),
+				"Middle line info",
+				vscode.DiagnosticSeverity.Information,
+			),
+		]
+
+		// Mock fs.stat to return file type
+		const mockStat = {
+			type: vscode.FileType.File,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock document content with specific line texts for each test case
+		const mockDocument = {
+			lineAt: jest.fn((line: number) => {
+				const lineTexts: Record<number, string> = {
+					0: "Line 0 content for warning",
+					2: "Line 2 content for info",
+					4: "Line 4 content for error",
+				}
+				return { text: lineTexts[line] }
+			}),
+		}
+		vscode.workspace.openTextDocument = jest.fn().mockResolvedValue(mockDocument)
+
+		// Call the function with all severities
+		const result = await diagnosticsToProblemsString(
+			[[fileUri, diagnostics]],
+			[vscode.DiagnosticSeverity.Error, vscode.DiagnosticSeverity.Warning, vscode.DiagnosticSeverity.Information],
+			"/path/to",
+		)
+
+		// Verify all diagnostics are included in the output
+		expect(result).toContain("First line warning")
+		expect(result).toContain("Middle line info")
+		expect(result).toContain("Later line error")
+
+		// Verify line content is included for each diagnostic and matches the test case
+		expect(result).toContain("Line 0 content for warning")
+		expect(result).toContain("Line 2 content for info")
+		expect(result).toContain("Line 4 content for error")
+
+		// Verify the output contains all severity labels
+		expect(result).toContain("[test Warning]")
+		expect(result).toContain("[test Information]")
+		expect(result).toContain("[test Error]")
+
+		// Verify diagnostics appear in line number order (even though input wasn't sorted)
+		// Verify exact output format
+		expect(result).toBe(
+			"file.ts\n" +
+				"- [test Warning] 1 | Line 0 content for warning : First line warning\n" +
+				"- [test Information] 3 | Line 2 content for info : Middle line info\n" +
+				"- [test Error] 5 | Line 4 content for error : Later line error",
+		)
+	})
+
+	it("should correctly handle diagnostics from multiple files", async () => {
+		// Mock URIs for different files
+		const fileUri1 = vscode.Uri.file("/path/to/file1.ts")
+		const fileUri2 = vscode.Uri.file("/path/to/subdir/file2.ts")
+
+		// Create diagnostics for each file
+		const diagnostics1 = [
+			new vscode.Diagnostic(new vscode.Range(0, 0, 0, 10), "File1 error", vscode.DiagnosticSeverity.Error),
+		]
+
+		const diagnostics2 = [
+			new vscode.Diagnostic(new vscode.Range(1, 0, 1, 10), "File2 warning", vscode.DiagnosticSeverity.Warning),
+			new vscode.Diagnostic(new vscode.Range(2, 0, 2, 10), "File2 info", vscode.DiagnosticSeverity.Information),
+		]
+
+		// Mock fs.stat to return file type for both files
+		const mockStat = {
+			type: vscode.FileType.File,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock document content with specific line texts for each test case
+		const mockDocument1 = {
+			lineAt: jest.fn((_line) => ({
+				text: "Line 1 content for error",
+			})),
+		}
+		const mockDocument2 = {
+			lineAt: jest.fn((line) => {
+				const lineTexts = ["Line 1 content", "Line 2 content for warning", "Line 3 content for info"]
+				return { text: lineTexts[line] }
+			}),
+		}
+		vscode.workspace.openTextDocument = jest
+			.fn()
+			.mockResolvedValueOnce(mockDocument1)
+			.mockResolvedValueOnce(mockDocument2)
+
+		// Call the function with all severities
+		const result = await diagnosticsToProblemsString(
+			[
+				[fileUri1, diagnostics1],
+				[fileUri2, diagnostics2],
+			],
+			[vscode.DiagnosticSeverity.Error, vscode.DiagnosticSeverity.Warning, vscode.DiagnosticSeverity.Information],
+			"/path/to",
+		)
+
+		// Verify file paths are correctly shown with relative paths
+		expect(result).toContain("file1.ts")
+		expect(result).toContain("subdir/file2.ts")
+
+		// Verify diagnostics are grouped under their respective files
+		const file1Section = result.split("file1.ts")[1]
+		expect(file1Section).toContain("File1 error")
+		expect(file1Section).toContain("Line 1 content for error")
+
+		const file2Section = result.split("subdir/file2.ts")[1]
+		expect(file2Section).toContain("File2 warning")
+		expect(file2Section).toContain("Line 2 content for warning")
+		expect(file2Section).toContain("File2 info")
+		expect(file2Section).toContain("Line 3 content for info")
+
+		// Verify exact output format
+		expect(result).toBe(
+			"file1.ts\n" +
+				"- [test Error] 1 | Line 1 content for error : File1 error\n\n" +
+				"subdir/file2.ts\n" +
+				"- [test Warning] 2 | Line 2 content for warning : File2 warning\n" +
+				"- [test Information] 3 | Line 3 content for info : File2 info",
+		)
+	})
+
+	it("should return empty string when no diagnostics match the severity filter", async () => {
+		// Mock file URI
+		const fileUri = vscode.Uri.file("/path/to/file.ts")
+
+		// Create diagnostics with Error and Warning severities
+		const diagnostics = [
+			new vscode.Diagnostic(new vscode.Range(0, 0, 0, 10), "Error message", vscode.DiagnosticSeverity.Error),
+			new vscode.Diagnostic(new vscode.Range(1, 0, 1, 10), "Warning message", vscode.DiagnosticSeverity.Warning),
+		]
+
+		// Mock fs.stat to return file type
+		const mockStat = {
+			type: vscode.FileType.File,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock document content (though it shouldn't be accessed in this case)
+		const mockDocument = {
+			lineAt: jest.fn((line) => ({
+				text: `Line ${line + 1} content`,
+			})),
+		}
+		vscode.workspace.openTextDocument = jest.fn().mockResolvedValue(mockDocument)
+
+		// Test with Information and Hint severities only (which don't match our diagnostics)
+		const result = await diagnosticsToProblemsString(
+			[[fileUri, diagnostics]],
+			[vscode.DiagnosticSeverity.Information, vscode.DiagnosticSeverity.Hint],
+			"/path/to",
+		)
+
+		// Verify empty string is returned
+		expect(result).toBe("")
+
+		// Verify no unnecessary calls were made
+		expect(vscode.workspace.fs.stat).not.toHaveBeenCalled()
+		expect(vscode.workspace.openTextDocument).not.toHaveBeenCalled()
+	})
+
+	it("should correctly handle cwd parameter for relative file paths", async () => {
+		// Mock file URI in a subdirectory
+		const fileUri = vscode.Uri.file("/project/root/src/utils/file.ts")
+
+		// Create a diagnostic for the file
+		const diagnostic = new vscode.Diagnostic(
+			new vscode.Range(4, 0, 4, 10),
+			"Relative path test error",
+			vscode.DiagnosticSeverity.Error,
+		)
+
+		// Mock fs.stat to return file type
+		const mockStat = {
+			type: vscode.FileType.File,
+		}
+		vscode.workspace.fs.stat = jest.fn().mockResolvedValue(mockStat)
+
+		// Mock document content matching test assertion
+		const mockDocument = {
+			lineAt: jest.fn((line) => ({
+				text: `Line ${line + 1} content for error`,
+			})),
+		}
+		vscode.workspace.openTextDocument = jest.fn().mockResolvedValue(mockDocument)
+
+		// Mock path.relative to return the expected relative path
+		jest.mock("path", () => ({
+			relative: jest.fn((cwd, fullPath) => {
+				if (cwd === "/project/root" && fullPath === "/project/root/src/utils/file.ts") {
+					return "src/utils/file.ts"
+				}
+				return fullPath
+			}),
+		}))
+
+		// Call the function with cwd set to the project root
+		const result = await diagnosticsToProblemsString(
+			[[fileUri, [diagnostic]]],
+			[vscode.DiagnosticSeverity.Error],
+			"/project/root",
+		)
+
+		// Verify exact output format
+		expect(result).toBe(
+			"src/utils/file.ts\n" + "- [test Error] 5 | Line 5 content for error : Relative path test error",
+		)
+
+		// Verify fs.stat and openTextDocument were called
+		expect(vscode.workspace.fs.stat).toHaveBeenCalledWith(fileUri)
+		expect(vscode.workspace.openTextDocument).toHaveBeenCalledWith(fileUri)
+	})
+})