(132587065) URL: Don't standardize relative file paths (#792) (#798)

(cherry picked from commit e1223a0)

Co-authored-by: Jonathan Flat <50605158+jrflat@users.noreply.github.com>

Author: parkera

Sources/FoundationEssentials/URL/URL.swift

@@ -2155,14 +2155,6 @@ extension URL {
             isDirectory = filePath.utf8.last == slash
         }
 
-        if !isAbsolute {
-            #if !NO_FILESYSTEM
-            filePath = filePath.standardizingPath
-            #else
-            filePath = filePath.removingDotSegments
-            #endif
-        }
-
         #if os(Windows)
         // Convert any "\" back to "/" before storing the URL parse info
         filePath = filePath.replacing(UInt8(ascii: "\\"), with: UInt8(ascii: "/"))

Tests/FoundationEssentialsTests/URLTests.swift

@@ -352,6 +352,23 @@ final class URLTests : XCTestCase {
         }
     }
 
+    func testURLRelativeDotDotResolution() throws {
+        let baseURL = URL(filePath: "/docs/src/")
+        var result = URL(filePath: "../images/foo.png", relativeTo: baseURL)
+        #if FOUNDATION_FRAMEWORK_NSURL
+        XCTAssertEqual(result.path, "/docs/images/foo.png")
+        #else
+        XCTAssertEqual(result.path(), "/docs/images/foo.png")
+        #endif
+
+        result = URL(filePath: "/../images/foo.png", relativeTo: baseURL)
+        #if FOUNDATION_FRAMEWORK_NSURL
+        XCTAssertEqual(result.path, "/../images/foo.png")
+        #else
+        XCTAssertEqual(result.path(), "/../images/foo.png")
+        #endif
+    }
+
     func testAppendFamily() throws {
         let base = URL(string: "https://www.example.com")!