Utils: Add carriage return strip method to SmallString

Sometimes you want to compare unix and windows texts in tests. This is a
convenient function to remove the carriage returns.

Change-Id: I164298b70d3d775dd45903ea3753ac0e68ed2fdc
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/utils/smallstring.h

@@ -472,6 +472,15 @@ public:
         setSize(newSize);
     }
 
+    BasicSmallString toCarriageReturnsStripped() const
+    {
+        BasicSmallString text = *this;
+
+        text.replace("\r", "");
+
+        return text;
+    }
+
     constexpr static
     size_type shortStringCapacity() noexcept
     {

tests/unit/unittest/smallstring-test.cpp

@@ -1050,3 +1050,12 @@ TEST(SmallString, ReplaceByPositionEqualSizedTexts)
     ASSERT_THAT(text, SmallString("this is very very very very very much text"));
 }
 
+TEST(SmallString, CompareTextWithDifferentLineEndings)
+{
+    SmallString unixText("some \ntext");
+    SmallString windowsText("some \n\rtext");
+
+    auto convertedText = windowsText.toCarriageReturnsStripped();
+
+    ASSERT_THAT(unixText, convertedText);
+}