diff --git a/02-almost_full_example/modules/mod1/lib2/CMakeLists.txt b/02-almost_full_example/modules/mod1/lib2/CMakeLists.txt
index cbb88dd..e818fc7 100644
--- a/02-almost_full_example/modules/mod1/lib2/CMakeLists.txt
+++ b/02-almost_full_example/modules/mod1/lib2/CMakeLists.txt
@@ -28,8 +28,30 @@ aoe_add_library(lib2
     # Other3rdLibrary [... its components]
 )
 
-aoe_add_executable_test(lib2
+# -------------------------------------------------------------
+# Create an executable test target with one default source file.
+#
+# Default behaviors:
+#   - includes the 'include' directory under this file's root
+#   - add 'test/<target name>.cpp' as the source file,
+#     or 'test/<target name>-<case name>.cpp' as the source file if CASE is given
+#   - links the library target with the same name
+
+aoe_add_test(lib2
     DEPEND
     proto2 # lib2's private dependencies will not be propagated to this target,
            # if you need them, you should explicitly declare to depend on them.
 )
+aoe_add_test(lib2 CASE case1)
+
+# -------------------------------------------------------------
+# Create an executable example target with one default source file.
+#
+# Default behaviors:
+#   - includes the 'include' directory under this file's root
+#   - add 'example/<target name>.cpp' as the source file,
+#     or 'example/<target name>-<case name>.cpp' as the source file if CASE is given
+#   - links the library target with the same name
+
+aoe_add_example(lib2)
+aoe_add_example(lib2 CASE case1)
diff --git a/02-almost_full_example/modules/mod1/lib2/example/lib2-case1.cpp b/02-almost_full_example/modules/mod1/lib2/example/lib2-case1.cpp
new file mode 100644
index 0000000..2c7b4d6
--- /dev/null
+++ b/02-almost_full_example/modules/mod1/lib2/example/lib2-case1.cpp
@@ -0,0 +1,12 @@
+//
+// Created by yarten on 24-1-13.
+//
+
+#include <demo/lib2.h>
+
+int main()
+{
+    demo::Lib2 lib2("Example with case");
+    lib2.sayHello();
+    return 0;
+}
diff --git a/02-almost_full_example/modules/mod1/lib2/example/lib2.cpp b/02-almost_full_example/modules/mod1/lib2/example/lib2.cpp
new file mode 100644
index 0000000..c50a343
--- /dev/null
+++ b/02-almost_full_example/modules/mod1/lib2/example/lib2.cpp
@@ -0,0 +1,12 @@
+//
+// Created by yarten on 24-1-13.
+//
+
+#include <demo/lib2.h>
+
+int main()
+{
+    demo::Lib2 lib2("Exmaple");
+    lib2.sayHello();
+    return 0;
+}
diff --git a/02-almost_full_example/modules/mod1/lib2/test/lib2-case1.cpp b/02-almost_full_example/modules/mod1/lib2/test/lib2-case1.cpp
new file mode 100644
index 0000000..4c2abeb
--- /dev/null
+++ b/02-almost_full_example/modules/mod1/lib2/test/lib2-case1.cpp
@@ -0,0 +1,12 @@
+//
+// Created by yarten on 24-1-13.
+//
+
+#include <demo/lib2.h>
+
+int main()
+{
+    demo::Lib2 lib2("Test with case");
+    lib2.sayHello();
+    return 0;
+}
diff --git a/02-almost_full_example/modules/mod1/lib2/test/lib2/main.cpp b/02-almost_full_example/modules/mod1/lib2/test/lib2.cpp
similarity index 90%
rename from 02-almost_full_example/modules/mod1/lib2/test/lib2/main.cpp
rename to 02-almost_full_example/modules/mod1/lib2/test/lib2.cpp
index f5344dd..8ea7a6e 100644
--- a/02-almost_full_example/modules/mod1/lib2/test/lib2/main.cpp
+++ b/02-almost_full_example/modules/mod1/lib2/test/lib2.cpp
@@ -8,7 +8,7 @@
 
 int main()
 {
-    demo::Lib2 lib2;
+    demo::Lib2 lib2("Test");
     lib2.sayHello();
 
     std::cout << std::endl << "proto2 is used in main():" << std::endl;