#66 check for lines

pom.xml

@@ -124,11 +124,7 @@ SOFTWARE.
     <dependency>
       <groupId>org.eolang</groupId>
       <artifactId>eo-parser</artifactId>
-      <version>0.43.2</version>
-      <!--
-         EO-parser should be used in compile scope in order to be able provide
-         XSLs for imports for lint XSLs.
-      -->
+      <version>0.44.0</version>
       <scope>compile</scope>
     </dependency>
     <dependency>

src/main/resources/org/eolang/lints/refs/line-is-absent.xsl

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2016-2024 Objectionary.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="line-is-absent" version="2.0">
+  <!--
+  Here we go through all objects and find what their @base
+  are referring to. If we find the object they refer to,
+  everything is OK. If we don't, we report an error.
+  -->
+  <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template match="/">
+    <defects>
+      <xsl:for-each select="//o[@base and not(starts-with(@base, '.')) and @base!='$' and @base!='^']">
+        <xsl:variable name="self" select="."/>
+        <xsl:variable name="target" select="ancestor::*[o[@name=$self/@base and not(@line)]][1]/o[@name=$self/@base and not(@line)]"/>
+        <xsl:if test="$target">
+          <xsl:element name="defect">
+            <xsl:attribute name="line">
+              <xsl:value-of select="if (@line) then @line else '0'"/>
+            </xsl:attribute>
+            <xsl:attribute name="severity">
+              <xsl:text>error</xsl:text>
+            </xsl:attribute>
+            <xsl:text>Attribute @line is absent at "</xsl:text>
+            <xsl:value-of select="$target/@name"/>
+            <xsl:text>"</xsl:text>
+          </xsl:element>
+        </xsl:if>
+      </xsl:for-each>
+    </defects>
+  </xsl:template>
+</xsl:stylesheet>

src/test/java/org/eolang/lints/LintByXslTest.java

@@ -23,11 +23,11 @@
  */
 package org.eolang.lints;
 
-import com.jcabi.log.Logger;
 import com.jcabi.xml.XML;
 import com.jcabi.xml.XMLDocument;
 import com.yegor256.xsline.Shift;
 import com.yegor256.xsline.StClasspath;
+import com.yegor256.xsline.TrDefault;
 import com.yegor256.xsline.Train;
 import com.yegor256.xsline.Xsline;
 import java.io.IOException;
@@ -38,7 +38,6 @@
 import org.eolang.jucs.ClasspathSource;
 import org.eolang.parser.CheckPack;
 import org.eolang.parser.EoSyntax;
-import org.eolang.parser.TrParsing;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
 import org.hamcrest.core.IsEqual;
@@ -88,24 +87,22 @@ void testsAllLintsByXmir(final String pack) {
         final Yaml yaml = new Yaml();
         final Map<String, Object> map = yaml.load(pack);
         final Iterable<String> xsls = (Iterable<String>) map.get("xsls");
-        Train<Shift> train = new TrParsing();
+        Train<Shift> train = new TrDefault<>();
         if (xsls != null) {
             for (final String xsl : xsls) {
                 train = train.with(new StClasspath(xsl));
             }
         }
-        final XML out = new Xsline(train).pass(
-            new XMLDocument(map.get("xmir").toString())
-        );
-        Logger.debug(this, "Output XML:\n%s", out);
+        final XML xmir = new XMLDocument(map.get("xmir").toString());
+        final XML out = new Xsline(train).pass(xmir);
         final Collection<String> failures = new LinkedList<>();
         for (final String xpath : (Iterable<String>) map.get("tests")) {
             if (out.nodes(xpath).isEmpty()) {
                 failures.add(xpath);
             }
         }
         MatcherAssert.assertThat(
-            String.format("Broken XML:\n%s", out),
+            String.format("Input XML:%n%s%nBroken XML:%n%s", xmir, out),
             failures,
             Matchers.emptyIterable()
         );

src/test/resources/org/eolang/lints/xmir-packs/line-is-absent/missing-line.yaml

@@ -0,0 +1,35 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2016-2024 Objectionary.com
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+---
+xsls:
+  - /org/eolang/lints/refs/line-is-absent.xsl
+tests:
+  - /defects[count(defect[@severity='error'])=1]
+xmir: |
+  <program>
+    <objects>
+      <o abstract="">
+        <o name="foo"/>
+        <o name="bar" base="foo"/>
+      </o>
+    </objects>
+  </program>