Add testPartialInSubfolder (#72)

* Add testPartialInSubfolder

* Replace windows folder separator with mac/linux folder separator

Sources/Mustache/Library+FileSystem.swift

@@ -31,7 +31,11 @@ extension MustacheLibrary {
                 guard let template = try MustacheTemplate(filename: directory + path) else { continue }
                 // drop ".mustache" from path to get name
                 let name = String(path.dropLast(extWithDot.count))
+                #if os(Windows)
+                templates[name.replacingOccurrences(of: "\\", with: "/")] = template
+                #else
                 templates[name] = template
+                #endif
             } catch let error as MustacheTemplate.ParserError {
                 throw ParserError(filename: path, context: error.context, error: error.error)
             }

Tests/MustacheTests/LibraryTests.swift

@@ -48,6 +48,24 @@ final class LibraryTests: XCTestCase {
         XCTAssertEqual(library.render(object, withTemplate: "test"), "<test><value>value1</value><value>value2</value></test>")
     }
 
+    func testPartialInSubfolder() async throws {
+        let fs = FileManager()
+        try? fs.createDirectory(atPath: "templates/subfolder", withIntermediateDirectories: true)
+        let mustache = Data("<test>{{#value}}<value>{{.}}</value>{{/value}}</test>".utf8)
+        try mustache.write(to: URL(fileURLWithPath: "templates/subfolder/test-partial.mustache"))
+        let mustache2 = Data("{{>subfolder/test-partial}}".utf8)
+        try mustache2.write(to: URL(fileURLWithPath: "templates/test.mustache"))
+        defer {
+            XCTAssertNoThrow(try fs.removeItem(atPath: "templates/subfolder/test-partial.mustache"))
+            XCTAssertNoThrow(try fs.removeItem(atPath: "templates/test.mustache"))
+            XCTAssertNoThrow(try fs.removeItem(atPath: "templates"))
+        }
+
+        let library = try await MustacheLibrary(directory: "./templates")
+        let object = ["value": ["value1", "value2"]]
+        XCTAssertEqual(library.render(object, withTemplate: "test"), "<test><value>value1</value><value>value2</value></test>")
+    }
+
     func testLibraryParserError() async throws {
         let fs = FileManager()
         try? fs.createDirectory(atPath: "templates", withIntermediateDirectories: false)