Filtering anomaly

[Bracewell, Robert]

Hi,

Noticed an oddity with filtering in that it is replacing the wrong
properties under certain conditions. The key thing to note in below
mockup is the url property in pom.xml

Contents of pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd";>
        <modelVersion>4.0.0</modelVersion>
        <url>http://THIS_IS_A_URL_TO_HIGHLIGHT_THE_BUG</url>
        <groupId>com.maven.bugs</groupId>
        <artifactId>bug1</artifactId>
        <version>1</version>
        <packaging>jar</packaging>
        <name>Maven Bug 1</name>
        <build>
                <testResources>
                        <testResource>
        
<directory>src/test/resources</directory>
                                <filtering>true</filtering>
                        </testResource>
                </testResources>
        </build>
</project>

In the src/test/resources directory is a file that contains:
<?xml version="1.0" encoding="UTF-8"?>
<filtering>
        <property name="url">
                <value>${test.url}</value>
        </property>
</filtering>

When running mvn clean process-test-resources the file generated in
target/test-classes now contains:
<?xml version="1.0" encoding="UTF-8"?>
<filtering>
        <property name="url">
                <value>http://THIS_IS_A_URL_TO_HIGHLIGHT_THE_BUG</value>
        </property>
</filtering>

This is not what I expect as I don't have a property for test.url
defined

Is this a bug or am I expecting the wrong behaviour?

Thanks,
Robert