Fix tests on Linux

Author: mxcl

README.md

@@ -4,6 +4,8 @@ A file-system pathing library focused on developer experience and robust
 end‐results.
 
 ```swift
+import Path
+
 // convenient static members
 let home = Path.home
 
@@ -26,7 +28,7 @@ try Path.root.join("foo").copy(into: Path.root.mkdir("bar"))
 // were meant to be directory destinations
 ```
 
-Paths are just string representations, there *may not* be a real file there.
+Paths are just string representations, there *might not* be a real file there.
 
 # Support mxcl
 

Sources/Extensions.swift

@@ -47,7 +47,7 @@ public extension Data {
     func write(to: Path, atomically: Bool = false) throws -> Path {
         let opts: NSData.WritingOptions
         if atomically {
-        #if os(macOS)
+        #if !os(Linux)
             opts = .atomicWrite
         #else
             opts = .atomic

Sources/Path+FileManager.swift

@@ -73,24 +73,37 @@ public extension Path {
         return try "".write(to: self)
     }
 
-    @inlinable
-    @discardableResult
-    public func mkdir() throws -> Path {
+    private func _foo(go: () throws -> Void) throws {
+    #if !os(Linux)
         do {
-            try FileManager.default.createDirectory(at: url, withIntermediateDirectories: false, attributes: nil)
+            try go()
         } catch CocoaError.Code.fileWriteFileExists {
             // noop
         }
+    #else
+        do {
+            try go()
+        } catch {
+            let error = error as NSError
+            guard error.domain == NSCocoaErrorDomain, error.code == CocoaError.Code.fileWriteFileExists.rawValue else {
+                throw error
+            }
+        }
+    #endif
+    }
+
+    @discardableResult
+    public func mkdir() throws -> Path {
+        try _foo {
+            try FileManager.default.createDirectory(at: self.url, withIntermediateDirectories: false, attributes: nil)
+        }
         return self
     }
 
-    @inlinable
     @discardableResult
     public func mkpath() throws -> Path {
-        do {
+        try _foo {
             try FileManager.default.createDirectory(at: url, withIntermediateDirectories: true, attributes: nil)
-        } catch CocoaError.Code.fileWriteFileExists {
-            // noop
         }
         return self
     }

Sources/TemporaryDirectory.swift

@@ -5,7 +5,7 @@ public class TemporaryDirectory {
     public var path: Path { return Path(string: url.path) }
 
     public init() throws {
-    #if os(macOS)
+    #if !os(Linux)
         url = try FileManager.default.url(for: .itemReplacementDirectory, in: .userDomainMask, appropriateFor: URL(fileURLWithPath: "/"), create: true)
     #else
         let envs = ProcessInfo.processInfo.environment

Tests/PathTests/PathTests.swift

@@ -37,12 +37,12 @@ class PathTests: XCTestCase {
 
     func testExists() {
         XCTAssert(Path.root.exists)
-        XCTAssert((Path.root/"Users").exists)
+        XCTAssert((Path.root/"bin").exists)
     }
 
     func testIsDirectory() {
         XCTAssert(Path.root.isDirectory)
-        XCTAssert((Path.root/"Users").isDirectory)
+        XCTAssert((Path.root/"bin").isDirectory)
     }
 
     func testMktemp() throws {

Tests/PathTests/XCTestManifests.swift

@@ -15,7 +15,7 @@ extension PathTests {
     ]
 }
 
-#if !os(macOS)
+#if os(Linux)
 public func __allTests() -> [XCTestCaseEntry] {
     return [
         testCase(PathTests.__allTests),