Utilities: Fix QGCFileDownload for local files

src/Utilities/QGCFileDownload.cc

@@ -61,6 +61,7 @@ bool QGCFileDownload::download(const QString &remoteFile, const QList<QPair<QNet
     if (remoteFile.startsWith("http:") || remoteFile.startsWith("https:")) {
         remoteUrl.setUrl(remoteFile);
     } else {
+        // QNetworkRequest is used for local files too to use the same code path
         remoteUrl = QUrl::fromLocalFile(remoteFile);
     }
 
@@ -111,9 +112,11 @@ void QGCFileDownload::_downloadFinished()
         return;
     }
 
-    const int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
-    if ((statusCode < HTTP_Response::SUCCESS_OK) || (statusCode >= HTTP_Response::REDIRECTION_MULTIPLE_CHOICES)) {
-        return;
+    if (!reply->url().isLocalFile()) {
+        const int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+        if ((statusCode < HTTP_Response::SUCCESS_OK) || (statusCode >= HTTP_Response::REDIRECTION_MULTIPLE_CHOICES)) {
+            return;
+        }
     }
 
     QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);

test/UnitTestList.cc

@@ -198,7 +198,7 @@ int runTests(bool stress, QStringView unitTestOptions)
     // Utilities
     // Compression
     UT_REGISTER_TEST(DecompressionTest)
-    // UT_REGISTER_TEST(QGCFileDownloadTest)
+    UT_REGISTER_TEST(QGCFileDownloadTest)
 
     // Vehicle
     // Components

test/Utilities/CMakeLists.txt

@@ -16,3 +16,9 @@ target_link_libraries(UtilitiesTest
 )
 
 target_include_directories(UtilitiesTest PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+qt_add_resources(UtilitiesTest "UtilitiesTest_res"
+    PREFIX "/"
+    FILES
+        arducopter.apj
+)

test/Utilities/QGCFileDownloadTest.cc

@@ -3,10 +3,20 @@
 #include "QGCFileDownload.h"
 
 #include <QtTest/QTest>
+#include <QtTest/QSignalSpy>
 
 void QGCFileDownloadTest::_testFileDownload()
 {
-    QGCFileDownload file;
+    // Local File
+    QGCFileDownload *const downloader = new QGCFileDownload(this);
+    (void) connect(downloader, &QGCFileDownload::downloadComplete, this,
+        [this](const QString &remoteFile, const QString &localFile, const QString &errorMsg) {
+            sender()->deleteLater();
+            QVERIFY(errorMsg.isEmpty());
+        });
+    QSignalSpy spyQGCFileDownloadDownloadComplete(downloader, &QGCFileDownload::downloadComplete);
+    QVERIFY(downloader->download(":/arducopter.apj"));
+    QVERIFY(spyQGCFileDownloadDownloadComplete.wait(1000));
 }
 
 void QGCFileDownloadTest::_testCachedFileDownload()