WIP: Implement more of File

This commit is contained in:
Sami Samhuri 2025-08-26 08:55:28 -07:00
parent e59a68901a
commit ab21045498
No known key found for this signature in database
4 changed files with 155 additions and 34 deletions

View file

@ -320,7 +320,8 @@ public extension File {
}
static func isEmpty(_ url: URL) throws -> Bool {
fatalError("Not implemented")
let size = try self.size(url)
return size == 0
}
// Ruby aliases
@ -397,15 +398,16 @@ public extension File {
}
static func symlink(source: URL, destination: URL) throws {
fatalError("Not implemented")
try FileManager.default.createSymbolicLink(at: destination, withDestinationURL: source)
}
static func readlink(_ url: URL) throws -> URL {
fatalError("Not implemented")
let path = try FileManager.default.destinationOfSymbolicLink(atPath: url.path)
return URL(fileURLWithPath: path)
}
static func unlink(_ url: URL) throws {
fatalError("Not implemented")
try FileManager.default.removeItem(at: url)
}
static func delete(_ url: URL) throws {
@ -413,7 +415,11 @@ public extension File {
}
static func rename(source: URL, destination: URL) throws {
fatalError("Not implemented")
// Use replaceItem - it works whether destination exists or not
// and provides atomic replacement when it does exist
_ = try FileManager.default.replaceItem(
at: destination, withItemAt: source, backupItemName: nil, resultingItemURL: nil
)
}
static func truncate(_ url: URL, to size: Int) throws {
@ -421,7 +427,15 @@ public extension File {
}
static func touch(_ url: URL) throws {
fatalError("Not implemented")
let fm = FileManager.default
if fm.fileExists(atPath: url.path) {
// Update modification time to current time
try fm.setAttributes([.modificationDate: Date()], ofItemAtPath: url.path)
} else {
// Create empty file
fm.createFile(atPath: url.path, contents: nil, attributes: nil)
}
}
static func utime(_ url: URL, atime: Date, mtime: Date) throws {

View file

@ -43,53 +43,129 @@ final class FileOperationTests: XCTestCase {
}
func testSymlink() throws {
// TODO: Implement
// File.symlink(source, destination) creates symbolic link
// Create a file to link to
let target = tempDir.appendingPathComponent("target.txt")
try "Target content".write(to: target, atomically: true, encoding: .utf8)
// Create symlink
let link = tempDir.appendingPathComponent("symlink.txt")
try File.symlink(source: target, destination: link)
// Verify symlink exists and points to target
XCTAssertTrue(FileManager.default.fileExists(atPath: link.path))
// Reading through symlink should get target's content
XCTAssertEqual(try String(contentsOf: link), "Target content")
}
func testSymlinkThrowsIfDestExists() throws {
// TODO: Implement
let target = tempDir.appendingPathComponent("target.txt")
try "Target".write(to: target, atomically: true, encoding: .utf8)
let existingFile = tempDir.appendingPathComponent("existing.txt")
try "Existing".write(to: existingFile, atomically: true, encoding: .utf8)
// Should throw because destination exists
XCTAssertThrowsError(try File.symlink(source: target, destination: existingFile))
}
func testReadlink() throws {
// TODO: Implement
// File.readlink(url) returns target of symlink
// Create target and symlink
let target = tempDir.appendingPathComponent("readlink-target.txt")
try "Content".write(to: target, atomically: true, encoding: .utf8)
let link = tempDir.appendingPathComponent("readlink-symlink.txt")
try File.symlink(source: target, destination: link)
// readlink should return the target path
let readTarget = try File.readlink(link)
XCTAssertEqual(readTarget.lastPathComponent, "readlink-target.txt")
}
func testReadlinkThrowsForNonSymlink() throws {
// TODO: Implement
// Regular file, not a symlink
XCTAssertThrowsError(try File.readlink(sourceFile))
}
// MARK: - Delete Tests
func testUnlink() throws {
// TODO: Implement
// File.unlink(url) deletes file
// Create a file to delete
let fileToDelete = tempDir.appendingPathComponent("delete-me.txt")
try "Delete this file".write(to: fileToDelete, atomically: true, encoding: .utf8)
XCTAssertTrue(FileManager.default.fileExists(atPath: fileToDelete.path))
// Delete it
try File.unlink(fileToDelete)
XCTAssertFalse(FileManager.default.fileExists(atPath: fileToDelete.path))
}
func testUnlinkThrowsForNonExistent() throws {
// TODO: Implement
let nonExistent = tempDir.appendingPathComponent("does-not-exist.txt")
XCTAssertThrowsError(try File.unlink(nonExistent))
}
func testDelete() throws {
// TODO: Implement
// File.delete(url) is alias for unlink
// Create a file to delete
let fileToDelete = tempDir.appendingPathComponent("delete-me-too.txt")
try "Delete this too".write(to: fileToDelete, atomically: true, encoding: .utf8)
XCTAssertTrue(FileManager.default.fileExists(atPath: fileToDelete.path))
// Delete is an alias for unlink
try File.delete(fileToDelete)
XCTAssertFalse(FileManager.default.fileExists(atPath: fileToDelete.path))
}
// MARK: - Rename Tests
func testRename() throws {
// TODO: Implement
// File.rename(source, destination) moves/renames file
// Create source file
let source = tempDir.appendingPathComponent("original.txt")
let dest = tempDir.appendingPathComponent("renamed.txt")
let content = "Original content"
try content.write(to: source, atomically: true, encoding: .utf8)
// Rename it
try File.rename(source: source, destination: dest)
// Source should not exist, dest should exist with same content
XCTAssertFalse(FileManager.default.fileExists(atPath: source.path))
XCTAssertTrue(FileManager.default.fileExists(atPath: dest.path))
XCTAssertEqual(try String(contentsOf: dest), content)
}
func testRenameOverwritesExisting() throws {
// TODO: Implement
// rename should overwrite if dest exists
// Create source and destination files
let source = tempDir.appendingPathComponent("source.txt")
let dest = tempDir.appendingPathComponent("existing.txt")
try "Source content".write(to: source, atomically: true, encoding: .utf8)
try "Old content".write(to: dest, atomically: true, encoding: .utf8)
// Rename should overwrite destination
try File.rename(source: source, destination: dest)
XCTAssertFalse(FileManager.default.fileExists(atPath: source.path))
XCTAssertEqual(try String(contentsOf: dest), "Source content")
}
func testRenameThrowsForNonExistent() throws {
// TODO: Implement
func testRenameThrowsForNonExistentSource() throws {
let nonExistent = tempDir.appendingPathComponent("does-not-exist.txt")
// Test 1: When destination doesn't exist
let newDest = tempDir.appendingPathComponent("new-dest.txt")
XCTAssertThrowsError(try File.rename(source: nonExistent, destination: newDest))
XCTAssertFalse(FileManager.default.fileExists(atPath: newDest.path))
// Test 2: When destination exists (should be preserved on failure)
let existingDest = tempDir.appendingPathComponent("existing.txt")
let importantContent = "Important data that must not be lost"
try importantContent.write(to: existingDest, atomically: true, encoding: .utf8)
XCTAssertThrowsError(try File.rename(source: nonExistent, destination: existingDest))
// Destination should still exist with original content
XCTAssertTrue(FileManager.default.fileExists(atPath: existingDest.path))
XCTAssertEqual(try String(contentsOf: existingDest), importantContent)
}
// MARK: - Truncate Tests
@ -116,13 +192,31 @@ final class FileOperationTests: XCTestCase {
// MARK: - Touch Tests
func testTouch() throws {
// TODO: Implement
// File.touch(url) updates access/modification times
// Create a file with old times
let file = tempDir.appendingPathComponent("touch-test.txt")
try "content".write(to: file, atomically: true, encoding: .utf8)
// Get initial mtime
let initialMtime = try File.mtime(file)
// Wait a moment and touch
Thread.sleep(forTimeInterval: 0.1)
try File.touch(file)
// mtime should be updated
let newMtime = try File.mtime(file)
XCTAssertGreaterThan(newMtime, initialMtime)
}
func testTouchCreatesFile() throws {
// TODO: Implement
// touch creates file if it doesn't exist
// Touch non-existent file should create it
let newFile = tempDir.appendingPathComponent("created-by-touch.txt")
XCTAssertFalse(FileManager.default.fileExists(atPath: newFile.path))
try File.touch(newFile)
XCTAssertTrue(FileManager.default.fileExists(atPath: newFile.path))
XCTAssertEqual(try File.size(newFile), 0) // Should be empty
}
// MARK: - utime Tests

View file

@ -133,22 +133,35 @@ final class FileTypeTests: XCTestCase {
// MARK: - Empty/Zero Tests
func testIsEmpty() throws {
// TODO: Implement
// File.isEmpty(url) returns true for empty file
// Create empty file
let emptyFile = tempDir.appendingPathComponent("empty.txt")
try "".write(to: emptyFile, atomically: true, encoding: .utf8)
XCTAssertTrue(try File.isEmpty(emptyFile))
}
func testIsEmptyForNonEmpty() throws {
// TODO: Implement
// File.isEmpty(url) returns false for non-empty file
// testFile has content
XCTAssertFalse(try File.isEmpty(testFile))
// Create another non-empty file
let nonEmptyFile = tempDir.appendingPathComponent("nonempty.txt")
try "Some content".write(to: nonEmptyFile, atomically: true, encoding: .utf8)
XCTAssertFalse(try File.isEmpty(nonEmptyFile))
}
func testIsEmptyThrowsForNonExistent() throws {
// TODO: Implement
let nonExistent = tempDir.appendingPathComponent("does-not-exist.txt")
XCTAssertThrowsError(try File.isEmpty(nonExistent))
}
func testIsZero() throws {
// TODO: Implement
// File.isZero(url) is alias for isEmpty
// Create empty file
let emptyFile = tempDir.appendingPathComponent("zero.txt")
try "".write(to: emptyFile, atomically: true, encoding: .utf8)
// isZero is alias for isEmpty
XCTAssertTrue(try File.isZero(emptyFile))
XCTAssertFalse(try File.isZero(testFile))
}
// MARK: - ftype Tests