QT Creator: How to generate the library and testing executable for a custom widget

There is the following files:

MyWidget
   |- MyWidget.cpp
   |- MyWidget.hpp
   |- MyWidget_UnitTest.cpp

I would like to generate at once following files:

1. MyWidget.dll (or equivalent for non windows OS)


2. MyWidget_UnitTest.exe (or equivalent for non windows OS)

So it is easy to test the widget for bugs, but also to have the result inside further widgets or projects.

I tried to manipulate the .pro file, but with no success:

# ONLY TESTING UNIT
QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = MyWidget_UnitTest
TEMPLATE = app
SOURCES +=\
    MyWidget.cpp \
    MyWidget_UnitTest.cpp
HEADERS  += \
    MyWidget.hpp
CONFIG += c++11 -Wall

#ONLY LIB
QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = MyWidget_UnitTest
TEMPLATE = lib
SOURCES +=\
    MyWidget.cpp \
    MyWidget_UnitTest.cpp
HEADERS  += \
    MyWidget.hpp
CONFIG += c++11 -Wall
CONFIG += dll

I am unable to merge both into a single project.

Possibly more result could be added: static vs dynamic lib, etc.