link-preview: use non-ASCII UTF-8 characters in a UTF-8 test

Non-ASCII characters in UTF-8 are encoded with multiple bytes. Testing with these characters ensures that the decoder correctly interprets multi-byte sequences.

Gitlab: #1536
Change-Id: I0a92ee91b6cd26d70daab1f9baef3a9577aee02e

tests/unittests/previewengine_unittest.cpp

@@ -24,15 +24,17 @@ class PreviewEngineFixture : public ::testing::Test
 public:
     // Prepare unit test context. Called at
     // prior each unit test execution
-    void SetUp() override {
+    void SetUp() override
+    {
         server = new QHttpServer();
         // Setup a server that can return an HTML body.
         server->listen(QHostAddress::LocalHost, 8000);
     }
 
-   // Close unit test context. Called
-   // after each unit test ending
-    void TearDown() override {
+    // Close unit test context. Called
+    // after each unit test ending
+    void TearDown() override
+    {
         delete server;
     }
 
@@ -47,9 +49,8 @@ public:
 TEST_F(PreviewEngineFixture, ParsingALinkEmitsInfoReadySignal)
 {
     auto link = QString("http://localhost:8000/test");
-    server->route("/test", [] () {
-        return QString("<meta property=\"og:title\" content=\"Test title\">");
-    });
+    server->route("/test",
+                  []() { return QString("<meta property=\"og:title\" content=\"Test title\">"); });
 
     QSignalSpy infoReadySpy(globalEnv.previewEngine.data(), &PreviewEngine::infoReady);
 
@@ -70,14 +71,14 @@ TEST_F(PreviewEngineFixture, ParsingALinkEmitsInfoReadySignal)
  */
 TEST_F(PreviewEngineFixture, UTF8CharactersAreParsedCorrectly)
 {
-    auto link = QString("http://localhost:8000/test");
-    server->route("/test", [] () {
-        return QString("<meta property=\"og:description\" content=\"Test de caractères Utf-8");
+    const auto testString = QString("liberté 自由 自由 свобода Szabadság ŐőŰű 자유 😊 € è ñ");
+    server->route("/test", [&]() {
+        return QString("<meta property=\"og:description\" content=\"%1\">").arg(testString);
     });
 
     QSignalSpy infoReadySpy(globalEnv.previewEngine.data(), &PreviewEngine::infoReady);
 
-    Q_EMIT globalEnv.previewEngine->parseLink("msgId_01", link);
+    Q_EMIT globalEnv.previewEngine->parseLink("msgId_01", "http://localhost:8000/test");
 
     // Wait for the infoReady signal which should be emitted once.
     infoReadySpy.wait();
@@ -89,5 +90,5 @@ TEST_F(PreviewEngineFixture, UTF8CharactersAreParsedCorrectly)
     // Check that the description is parsed correctly.
     QVariantMap info = infoReadyArguments.at(1).toMap();
     EXPECT_TRUE(info.contains("description"));
-    EXPECT_EQ(info["description"].toString(), "Test de caractères Utf-8");
+    EXPECT_EQ(info["description"].toString(), testString);
 }