Fix flaky TestFileManager.test_emptyFilename

Author: jrflat

Tests/Foundation/TestFileManager.swift

@@ -1298,22 +1298,22 @@ class TestFileManager : XCTestCase {
             XCTAssertEqual(code, emptyFileNameError ?? .fileNoSuchFile)
         }
 
-        XCTAssertThrowsError(try fm.copyItem(atPath: "", toPath: "/tmp/t"))  {
+        XCTAssertThrowsError(try fm.copyItem(atPath: "", toPath: "/test_emptyFilename_nonExistent"))  {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileReadNoSuchFile)
         }
         XCTAssertThrowsError(try fm.copyItem(atPath: "", toPath: ""))  {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileReadNoSuchFile)
         }
-        XCTAssertThrowsError(try fm.copyItem(atPath: "/tmp/t", toPath: "")) {
+        XCTAssertThrowsError(try fm.copyItem(atPath: "/test_emptyFilename_nonExistent", toPath: "")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, .fileReadNoSuchFile)
         }
 
         #if false
         // TODO: re-enable when URLResourceValues are supported in swift-foundation
-        XCTAssertThrowsError(try fm.moveItem(atPath: "", toPath: "/tmp/t")) {
+        XCTAssertThrowsError(try fm.moveItem(atPath: "", toPath: "/test_emptyFilename_nonExistent")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileReadInvalidFileName)
         }
@@ -1326,7 +1326,7 @@ class TestFileManager : XCTestCase {
             XCTAssertEqual(code, .fileWriteFileExists)
             #endif
         }
-        XCTAssertThrowsError(try fm.moveItem(atPath: "/tmp/t", toPath: "")) {
+        XCTAssertThrowsError(try fm.moveItem(atPath: "/test_emptyFilename_nonExistent", toPath: "")) {
             let code = ($0 as? CocoaError)?.code
             #if os(Windows)
             XCTAssertEqual(code, .fileNoSuchFile)
@@ -1335,15 +1335,15 @@ class TestFileManager : XCTestCase {
             #endif
         }
 
-        XCTAssertThrowsError(try fm.linkItem(atPath: "", toPath: "/tmp/t")) {
+        XCTAssertThrowsError(try fm.linkItem(atPath: "", toPath: "/test_emptyFilename_nonExistent")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileReadNoSuchFile)
         }
         XCTAssertThrowsError(try fm.linkItem(atPath: "", toPath: "")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileReadNoSuchFile)
         }
-        XCTAssertThrowsError(try fm.linkItem(atPath: "/tmp/t", toPath: "")) {
+        XCTAssertThrowsError(try fm.linkItem(atPath: "/test_emptyFilename_nonExistent", toPath: "")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, .fileReadNoSuchFile)
         }
@@ -1352,11 +1352,11 @@ class TestFileManager : XCTestCase {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileNoSuchFile)
         }
-        XCTAssertThrowsError(try fm.createSymbolicLink(atPath: "", withDestinationPath: "/tmp/t")) {
+        XCTAssertThrowsError(try fm.createSymbolicLink(atPath: "", withDestinationPath: "/test_emptyFilename_nonExistent")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, emptyFileNameError ?? .fileNoSuchFile)
         }
-        XCTAssertThrowsError(try fm.createSymbolicLink(atPath: "/tmp/t", withDestinationPath: "")) {
+        XCTAssertThrowsError(try fm.createSymbolicLink(atPath: "/test_emptyFilename_nonExistent", withDestinationPath: "")) {
             let code = ($0 as? CocoaError)?.code
             XCTAssertEqual(code, .fileNoSuchFile)
         }
@@ -1387,8 +1387,8 @@ class TestFileManager : XCTestCase {
 
         XCTAssertNil(fm.contents(atPath: ""))
         XCTAssertFalse(fm.contentsEqual(atPath: "", andPath: ""))
-        XCTAssertFalse(fm.contentsEqual(atPath: "/tmp/t", andPath: ""))
-        XCTAssertFalse(fm.contentsEqual(atPath: "", andPath: "/tmp/t"))
+        XCTAssertFalse(fm.contentsEqual(atPath: "/test_emptyFilename_nonExistent", andPath: ""))
+        XCTAssertFalse(fm.contentsEqual(atPath: "", andPath: "/test_emptyFilename_nonExistent"))
 
         //_ = fm.fileSystemRepresentation(withPath: "")  // NSException
         XCTAssertEqual(fm.string(withFileSystemRepresentation: UnsafePointer(bitPattern: 1)!, length: 0), "")