Add CheckRedirectTests

Tests/ValidatorTests/CheckRedirectTests.swift

@@ -0,0 +1,52 @@
+// Copyright Dave Verwer, Sven A. Schmidt, and other contributors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import XCTest
+
+@testable import ValidatorCore
+
+
+final class CheckRedirectTests: XCTestCase {
+
+    func test_process_new_redirect() async throws {
+        // setup - redirected to URL is new
+        Validator.CheckRedirects.normalizedPackageURLs = .init(inputURLs: [.p1])
+
+        // MUT
+        let res = try await Validator.CheckRedirects.process(redirect: .redirected(to: .p2),
+                                                             verbose: true,
+                                                             index: 0,
+                                                             packageURL: .p1)
+        XCTAssertEqual(res, .p2)
+    }
+
+    func test_process_existing_redirect() async throws {
+        // setup - redirected to URL is already known
+        Validator.CheckRedirects.normalizedPackageURLs = .init(inputURLs: [.p1, .p2])
+
+        // MUT
+        let res = try await Validator.CheckRedirects.process(redirect: .redirected(to: .p2),
+                                                             verbose: true,
+                                                             index: 0,
+                                                             packageURL: .p1)
+        XCTAssertEqual(res, nil)
+    }
+
+}
+
+
+private extension PackageURL {
+    static let p1 = PackageURL(argument: "https://github.com/org/1.git")!
+    static let p2 = PackageURL(argument: "https://github.com/org/2.git")!
+}