Update the current text after a translator is installed

This ensures that if the model is updated due to a retranslate
that it gets the updated string and the ComboBox shows it
correctly.

Change-Id: Iecbc18a1051d6db13035b3efa393d9bf97788dd9
Fixes: QTBUG-82020
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

8 files changed, 122 insertions, 10 deletions

diff --git a/tests/auto/auto.pro b/tests/auto/auto.pro
index 853c84a8..6059cf7b 100644
--- a/tests/auto/auto.pro
+++ b/tests/auto/auto.pro
@@ -30,7 +30,5 @@ SUBDIRS += \
     qquickuniversalstyleconf \
     revisions \
     sanity \
-    snippets
-
-# Requires lrelease, which isn't always available in CI.
-qtHaveModule(tools): translation
+    snippets \
+    translation
diff --git a/tests/auto/translation/data/comboBox.qml b/tests/auto/translation/data/comboBox.qml
new file mode 100644
index 00000000..8bb8ed6f
--- /dev/null
+++ b/tests/auto/translation/data/comboBox.qml
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.13
+import QtQuick.Controls 2.13
+
+ComboBox {
+    objectName: "comboBox"
+    textRole: "label"
+    model: ListModel {
+        ListElement {
+            label: qsTr("Hello")
+        }
+        ListElement {
+            label: qsTr("ListView")
+        }
+    }
+}
diff --git a/tests/auto/translation/qml_jp.qm b/tests/auto/translation/qml_jp.qm
new file mode 100644
index 00000000..a3712e99
--- /dev/null
+++ b/tests/auto/translation/qml_jp.qm
diff --git a/tests/auto/translation/qml_jp.ts b/tests/auto/translation/qml_jp.ts
new file mode 100644
index 00000000..303c142f
--- /dev/null
+++ b/tests/auto/translation/qml_jp.ts
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1" language="ja_JP">
+<context>
+    <name>main</name>
+    <message>
+        <location filename="../main.qml" line="8"/>
+        <source>Hello World</source>
+        <translation>こんにちは世界</translation>
+    </message>
+    <message>
+        <location filename="../main.qml" line="12"/>
+        <source>Hello Text</source>
+        <translation>ハローテキスト</translation>
+    </message>
+    <message>
+        <location filename="../main.qml" line="35"/>
+        <source>Hello</source>
+        <translation>こんにちは</translation>
+    </message>
+    <message>
+        <location filename="../main.qml" line="38"/>
+        <source>ListView</source>
+        <translation>リストビュー</translation>
+    </message>
+</context>
+</TS>
+
diff --git a/tests/auto/translation/qtbase_fr.qm b/tests/auto/translation/qtbase_fr.qm
new file mode 100644
index 00000000..176675a8
--- /dev/null
+++ b/tests/auto/translation/qtbase_fr.qm
diff --git a/tests/auto/translation/qtbase_fr.ts b/tests/auto/translation/qtbase_fr.ts
index a2a05a07..7aff8bd7 100644
--- a/tests/auto/translation/qtbase_fr.ts
+++ b/tests/auto/translation/qtbase_fr.ts
@@ -20,3 +20,4 @@
     </message>
 </context>
 </TS>
+
diff --git a/tests/auto/translation/translation.pro b/tests/auto/translation/translation.pro
index d2d9d6ee..a33cf56a 100644
--- a/tests/auto/translation/translation.pro
+++ b/tests/auto/translation/translation.pro
@@ -13,7 +13,4 @@ TESTDATA = data/*
 OTHER_FILES += \
     data/*.qml
 
-# We only want to run lrelease, which is why we use EXTRA_TRANSLATIONS.
-EXTRA_TRANSLATIONS = qtbase_fr.ts
-# Embed the translations in a qrc file.
-CONFIG += lrelease embed_translations
+RESOURCES += qml_jp.qm qtbase_fr.qm
diff --git a/tests/auto/translation/tst_translation.cpp b/tests/auto/translation/tst_translation.cpp
index 992c30a2..ffb39f96 100644
--- a/tests/auto/translation/tst_translation.cpp
+++ b/tests/auto/translation/tst_translation.cpp
@@ -42,8 +42,10 @@
 #include <QtGui/qpa/qplatformtheme.h>
 #include <QtQuick/qquickview.h>
 #include <QtQuickTemplates2/private/qquickabstractbutton_p.h>
+#include <QtQuickTemplates2/private/qquickcombobox_p.h>
 #include <QtQuickTemplates2/private/qquickdialog_p.h>
 #include <QtQuickTemplates2/private/qquickdialogbuttonbox_p.h>
+#include <QtQuickTemplates2/private/qquicktextfield_p.h>
 
 using namespace QQuickVisualTestUtil;
 
@@ -54,6 +56,7 @@ class tst_translation : public QQmlDataTest
 private slots:
     void dialogButtonBox();
     void dialogButtonBoxWithCustomButtons();
+    void comboBox();
 };
 
 void tst_translation::dialogButtonBox()
@@ -83,7 +86,7 @@ void tst_translation::dialogButtonBox()
     QCOMPARE(discardButton->text(), defaultDiscardText);
 
     QTranslator translator;
-    QVERIFY(translator.load(":/i18n/qtbase_fr.qm"));
+    QVERIFY(translator.load("qtbase_fr.qm", ":/"));
     QVERIFY(qApp->installTranslator(&translator));
     view.engine()->retranslate();
 
@@ -104,7 +107,7 @@ void tst_translation::dialogButtonBoxWithCustomButtons()
     // after the QML has been loaded.
     QScopedPointer<QTranslator> translator(new QTranslator);
     // Doesn't matter which language it is, as we won't be using it anyway.
-    QVERIFY(translator->load(":/i18n/qtbase_fr.qm"));
+    QVERIFY(translator->load("qtbase_fr.qm", ":/"));
     QVERIFY(qApp->installTranslator(translator.data()));
 
     QQuickView view(testFileUrl("dialogButtonBoxWithCustomButtons.qml"));
@@ -135,6 +138,26 @@ void tst_translation::dialogButtonBoxWithCustomButtons()
     QCOMPARE(cancelButton->text(), QLatin1String("Cancel"));
 }
 
+void tst_translation::comboBox()
+{
+    QQuickView view(testFileUrl("comboBox.qml"));
+
+    QQuickComboBox *comboBox = qobject_cast<QQuickComboBox*>(view.rootObject());
+    QVERIFY(comboBox);
+    QCOMPARE(comboBox->displayText(), QLatin1String("Hello"));
+
+    QQuickTextField *contentItem = qobject_cast<QQuickTextField*>(comboBox->contentItem());
+    QVERIFY(contentItem);
+    QCOMPARE(contentItem->text(), QLatin1String("Hello"));
+
+    QTranslator translator;
+    QVERIFY(translator.load("qml_jp.qm", ":/"));
+    QVERIFY(qApp->installTranslator(&translator));
+    view.engine()->retranslate();
+    QTRY_COMPARE(comboBox->displayText(), QString::fromUtf8("こんにちは"));
+    QCOMPARE(contentItem->text(), QString::fromUtf8("こんにちは"));
+}
+
 QTEST_MAIN(tst_translation)
 
 #include "tst_translation.moc"