From 792cb3989af2918f6a2878c22db51a009310756f Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@qt.io>
Date: Sat, 27 Jun 2020 11:14:32 +0200
Subject: Add support for first(n), last(n) and sliced() to QList
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This keeps the API symmetric with what we have in our string
classes.

Change-Id: I94c5b39b718ca2472f9ca645e7a42e4314636f67
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 tests/auto/corelib/tools/qlist/tst_qlist.cpp | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'tests/auto/corelib/tools')

diff --git a/tests/auto/corelib/tools/qlist/tst_qlist.cpp b/tests/auto/corelib/tools/qlist/tst_qlist.cpp
index ddf5e9c30a..fbd5cf6402 100644
--- a/tests/auto/corelib/tools/qlist/tst_qlist.cpp
+++ b/tests/auto/corelib/tools/qlist/tst_qlist.cpp
@@ -267,6 +267,7 @@ private slots:
     void last() const;
     void lastIndexOf() const;
     void mid() const;
+    void sliced() const;
     void moveInt() const;
     void moveMovable() const;
     void moveCustom() const;
@@ -1287,6 +1288,13 @@ void tst_QList::first() const
     myvec.prepend(23);
     QCOMPARE(myvec.first(), 23);
     QCOMPARE(myvec.constFirst(), 23);
+
+
+    QCOMPARE(QList<int>().first(0), QList<int>());
+    QCOMPARE(myvec.first(0), QList<int>());
+    QCOMPARE(myvec.first(1), (QList<int>{23}));
+    QCOMPARE(myvec.first(2), (QList<int>{23, 42}));
+    QCOMPARE(myvec.first(3), myvec);
 }
 
 void tst_QList::constFirst() const
@@ -1546,6 +1554,12 @@ void tst_QList::last() const
     myvec.remove(3);
     QCOMPARE(myvec.last(), QLatin1String("C"));
     QCOMPARE(myvec.constLast(), QLatin1String("C"));
+
+    QCOMPARE(QList<QString>().last(0), QList<QString>());
+    QCOMPARE(myvec.last(0), QList<QString>());
+    QCOMPARE(myvec.last(1), (QList<QString>{QLatin1String("C")}));
+    QCOMPARE(myvec.last(2), (QList<QString>{QLatin1String("B"), QLatin1String("C")}));
+    QCOMPARE(myvec.last(3), myvec);
 }
 
 void tst_QList::constLast() const
@@ -1648,6 +1662,22 @@ void tst_QList::mid() const
     QCOMPARE(list.mid(4), QList<QString>() << "buck" << "hello" << "kitty");
 }
 
+void tst_QList::sliced() const
+{
+    QList<QString> list;
+    list << "foo" << "bar" << "baz" << "bak" << "buck" << "hello" << "kitty";
+
+    QCOMPARE(QList<QString>().sliced(0), QList<QString>());
+    QCOMPARE(QList<QString>().sliced(0, 0), QList<QString>());
+    QCOMPARE(list.sliced(3, 3), QList<QString>() << "bak" << "buck" << "hello");
+    QCOMPARE(list.sliced(3), QList<QString>() << "bak" << "buck" << "hello" << "kitty");
+    QCOMPARE(list.sliced(6, 1), QList<QString>() << "kitty");
+    QCOMPARE(list.sliced(6), QList<QString>() << "kitty");
+    QCOMPARE(list.sliced(0, list.size()), list);
+    QCOMPARE(list.sliced(0), list);
+    QCOMPARE(list.sliced(4), QList<QString>() << "buck" << "hello" << "kitty");
+}
+
 template <typename T>
 void tst_QList::qhash() const
 {
-- 
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