add tests

text-ui-test/EXPECTED.txt

@@ -0,0 +1,8 @@
+I'm a Duck
+Quack Quack
+I'm a parrot
+Polly wants a cracker
+Adding item value: 25
+Ignoring low value item: 1
+Adding item value: 33
+Total value of equipments 58

text-ui-test/runtest.bat

@@ -0,0 +1,21 @@
+@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 Circus > ACTUAL.TXT
+
+REM compare the output to the expected output
+FC ACTUAL.TXT EXPECTED.TXT

text-ui-test/runtest.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# create bin directory if it doesn't exist
+if [ ! -d "../bin" ]
+then
+    mkdir ../bin
+fi
+
+# delete output from previous run
+if [ -e "./ACTUAL.TXT" ]
+then
+    rm ACTUAL.TXT
+fi
+
+# compile the code into the bin folder, terminates if error occurred
+if ! javac -cp ../src -Xlint:none -d ../bin ../src/main/java/*.java
+then
+    echo "********** BUILD FAILURE **********"
+    exit 1
+fi
+
+# run the program, feed commands from input.txt file and redirect the output to the ACTUAL.TXT
+java -classpath ../bin Circus > ACTUAL.TXT
+
+# compare the output to the expected output
+diff ACTUAL.TXT EXPECTED.TXT
+if [ $? -eq 0 ]
+then
+    echo "Test result: PASSED"
+    exit 0
+else
+    echo "Test result: FAILED"
+    exit 1
+fi