Documented the StaticFile enumeration in the library target.

Library/Sources/Internal/Enumerations/StaticFile.swift

@@ -1,7 +1,12 @@
+/// An enumeration that represents basic configuration static files which will be created by the `DocC` building process.
 enum StaticFile: String, CaseIterable {
+    /// A file defining the root of the articles' folder, which will be used to redirect to the root of the archives' root article.
     case documentation = "documentation.json"
+    /// A file containing the icon in `.ico` format for the documentation generated by the `DocC` building process.
     case faviconICO = "favicon.ico"
+    /// A file containing the icon in `.svg` format for the documentation generated by the `DocC` building process.
     case faviconSVG = "favicon.svg"
+    /// A file containing the theme settings for the documentation generated by the `DocC` building process.
     case themeSettings = "theme-settings.json"
 }
 
@@ -13,8 +18,8 @@ extension StaticFile: Pathable {
     
     var path: String {
         switch self {
-        case .documentation: "/data/" + rawValue
-        default: .init(format: .Format.pathRoot, rawValue)
+        case .documentation: .init(format: .Format.Path.data, rawValue)
+        default: .init(format: .Format.Path.root, rawValue)
         }
     }
     

Library/Sources/Internal/Extensions/String+Constants.swift

@@ -1,6 +1,7 @@
 extension String {
     enum Format {
         enum Path {
+            static let data = "/data/%@"
             static let docs = "/docs/%@"
             static let root = "/%@"
         }

Test/Sources/Cases/Internal/Enumerations/StaticFileTests.swift

@@ -0,0 +1,36 @@
+import Testing
+
+@testable import AppLibrary
+
+@Suite("StaticFile")
+struct StaticFileTests {
+
+    @Test(arguments: zip(StaticFile.allCases, [String].paths))
+    func path(
+        for prefix: StaticFile,
+        expects pathExpected: String
+    ) async throws {
+        // GIVEN
+        // WHEN
+        let path = prefix.path
+        
+        // THEN
+        #expect(path == pathExpected)
+    }
+
+}
+
+// MARK: - Collection+Strings
+
+private extension Collection where Element == String {
+    
+    // MARK: Properties
+    
+    static var paths: [Element] {[
+        "/data/documentation.json",
+        "/favicon.ico",
+        "/favicon.svg",
+        "/theme-settings.json"
+    ]}
+    
+}