Added tests around the UIImageView extension usage with redirect URLs.

Source/UIImageView+AlamofireImage.swift

@@ -320,7 +320,7 @@ extension UIImageView {
             completion: { [weak self] request, response, result in
                 guard let strongSelf = self else { return }
 
-                // Ignore the event if the response request does not match the current request
+                // Ignore the event if the response request does not match the original request
                 guard let
                     currentRequest = strongSelf.af_activeRequest?.task.originalRequest
                     where currentRequest.URLString == request?.URLString else

Tests/UIImageViewTests.swift

@@ -542,4 +542,28 @@ class UIImageViewTestCase: BaseTestCase {
         XCTAssertNotNil(imageView.image, "image view image should not be nil when completion handler is not nil")
         XCTAssertTrue(result?.isSuccess ?? false, "result should be a success case")
     }
+
+    // MARK: - Redirects
+
+    func testThatImageBehindRedirectCanBeDownloaded() {
+        // Given
+        let redirectURLString = "https://httpbin.org/image/png"
+        let URL = NSURL(string: "https://httpbin.org/redirect-to?url=\(redirectURLString)")!
+
+        let expectation = expectationWithDescription("image should download successfully")
+        var imageDownloadComplete = false
+
+        let imageView = TestImageView {
+            imageDownloadComplete = true
+            expectation.fulfill()
+        }
+
+        // When
+        imageView.af_setImageWithURL(URL)
+        waitForExpectationsWithTimeout(timeout, handler: nil)
+
+        // Then
+        XCTAssertTrue(imageDownloadComplete, "image download complete should be true")
+        XCTAssertNotNil(imageView.image, "image view image should not be nil")
+    }
 }