Added check for error roles in #66

ph-schematron-ant-task/src/test/java/com/helger/schematron/ant/Issue66v2Test.java

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+/**
+ * Copyright (C) 2017-2018 Philip Helger (www.helger.com)
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.helger.schematron.ant;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.BuildFileRule;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class Issue66v2Test
+{
+  private static final Logger LOGGER = LoggerFactory.getLogger (Issue66v2Test.class);
+
+  @Rule
+  public final BuildFileRule m_aBuildRule = new BuildFileRule ();
+
+  @Before
+  public void init ()
+  {
+    m_aBuildRule.configureProject ("src/test/resources/issues/66v2/build.xml");
+    m_aBuildRule.getProject ().addBuildListener (new LoggingBuildListener ());
+  }
+
+  @Test
+  public void testWithExternalDTD ()
+  {
+    try
+    {
+      // Do not redirect stdout etc.
+      m_aBuildRule.getProject ().executeTarget ("schematron");
+    }
+    catch (final BuildException ex)
+    {
+      LOGGER.error ("Ooops", ex);
+    }
+  }
+}

ph-schematron-ant-task/src/test/resources/issues/66v2/.gitignore

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+tmp/

ph-schematron-ant-task/src/test/resources/issues/66v2/build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project>
+  <taskdef name="schematron" classname="com.helger.schematron.ant.Schematron" />
+
+  <target name="schematron" description="Schematron rule tests">
+    <schematron svrlDirectory="tmp"
+                schematronProcessingEngine="pure"
+                schematronFile="rules.sch">
+      <fileset dir=".">
+        <include name="dog*.xml" />
+      </fileset>
+      <errorRole role="foo" />
+      <errorRole role="bar" />
+    </schematron>
+  </target>
+
+</project>

ph-schematron-ant-task/src/test/resources/issues/66v2/dog1.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<dog xml:lang="de">
+  <fleas/>
+</dog>

ph-schematron-ant-task/src/test/resources/issues/66v2/rules.sch

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+<schema xmlns="http://purl.oclc.org/dsdl/schematron" xml:lang="de">
+  <title>Example of a custom error role</title>
+  <pattern>
+    <rule context="dog">
+      <report test="not(bone)" role="bar"> A dog should have a bone.</report>
+      <report test="not(xyz)" role="info">Information only that xyz should be present.</report>
+    </rule>
+  </pattern>
+</schema>