Add ui-testing

text-ui-test/ACTUAL.TXT

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+Hello! I'm Duke
+What can I do for you?
+Got it. I've added this task:
+[T][?] check hotels for shengyi
+Now you have 1 tasks in the list.
+Bye. Hope to see you again soon!

text-ui-test/EXPECTED.txt

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+Hello! I'm Duke
+What can I do for you?
+Got it. I've added this task:
+[T][?] check hotels for shengyi
+Now you have 1 tasks in the list.
+Bye. Hope to see you again soon!

text-ui-test/input.txt

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+todo check hotels for shengyi
+bye

text-ui-test/runtest.bat

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+@ECHO OFF
+
+REM create bin directory if it doesn't exist
+if not exist ..\bin mkdir ..\bin
+
+REM delete output from previous run
+del ACTUAL.TXT
+
+REM compile the code into the bin folder
+javac -cp ..\src -Xlint:none -d ..\bin ..\src\main\java\*.java
+IF ERRORLEVEL 1 (
+    echo ********** BUILD FAILURE **********
+    exit /b 1
+)
+REM no error here, errorlevel == 0
+
+REM run the program, feed commands from input.txt file and redirect the output to the ACTUAL.TXT
+java -classpath ..\bin Duke < input.txt > ACTUAL.TXT
+
+REM compare the output to the expected output
+FC ACTUAL.TXT EXPECTED.TXT