AvailableTask value attribute - possible type inconsistencies

AvailableTask_MattKirwan

<?xml version="1.0" encoding="UTF-8"?>

<project name="test" default="test">

	<property name="dir" value="../test_directory" />

	<target name="test">
		
		<echo message="Test 1:" />
		<echo message="--------------------" />
		<!-- Test 1: 	Value attribute not declared.
						Defaults to "true" (as per docs).
		-->
		<available file="${dir}" type="dir" property="test1.dir.exists" />
		<echo message="AvailableTask value attribute: NOT SET" />
		<echo message="--------------------" />		
		<echo message="Actual AvailableTask value: ${test1.dir.exists}" />
		<echo message="--------------------" />
		<echo message="If arg2 = 'true' (string)" />
		<if>
			<equals arg1="${test1.dir.exists}" arg2="true" />
			<then>
				<echo message="Pass" />				
			</then>
			<else>
				<echo message="Fail" />
			</else>
		</if>
		<echo message="--------------------" />
		<echo message="If arg2 = '1' (string)" />
		<if>
			<equals arg1="${test1.dir.exists}" arg2="1" />
			<then>
				<echo message="Pass" />				
			</then>
			<else>
				<echo message="Fail" />
			</else>			
		</if>
		<echo message="--------------------" />
		<echo message="--------------------" />
		<echo message="--------------------" />
		<echo message="--------------------" />
		<echo message="--------------------" />
		
		<echo message="Test 2:" />
		<echo message="--------------------" />		
		<!-- Test 2: 	Value attribute declared as true (assumed string type).
		-->
		<available file="${dir}" type="dir" property="test2.dir.exists" value="true" />
		<echo message="AvailableTask value attribute: 'true' (string)" />
		<echo message="--------------------" />		
		<echo message="Actual AvailableTask value: ${test2.dir.exists}" />
		<echo message="--------------------" />
		<echo message="If arg2 = 'true' (string)" />
		<if>
			<equals arg1="${test2.dir.exists}" arg2="true" />
			<then>
				<echo message="Pass." />				
			</then>
			<else>
				<echo message="Fail" />
			</else>				
		</if>
		<echo message="--------------------" />
		<echo message="If arg2 = '1' (string)" />
		<if>
			<equals arg1="${test2.dir.exists}" arg2="1" />
			<then>
				<echo message="Pass" />				
			</then>
			<else>
				<echo message="Fail" />
			</else>			
		</if>		
		<echo message="--------------------" />

	</target>

</project>