Handle overflow in fractional numbers gracefully

plugin/pom.xml

@@ -19,7 +19,7 @@
   <url>https://github.com/jenkinsci/code-coverage-api-plugin</url>
 
   <properties>
-    <revision>4.3.0</revision>
+    <revision>4.2.2</revision>
     <changelist>-SNAPSHOT</changelist>
     <gitHubRepo>jenkinsci/code-coverage-api-plugin</gitHubRepo>
 

plugin/src/main/java/io/jenkins/plugins/coverage/metrics/model/ElementFormatter.java

@@ -15,6 +15,7 @@
 import edu.hm.hafner.coverage.IntegerValue;
 import edu.hm.hafner.coverage.Metric;
 import edu.hm.hafner.coverage.Percentage;
+import edu.hm.hafner.coverage.SafeFraction;
 import edu.hm.hafner.coverage.Value;
 
 import hudson.Functions;
@@ -348,7 +349,7 @@ public String formatDelta(final Fraction fraction, final Metric metric, final Lo
                 || metric.equals(Metric.LOC)) {
             return String.format(locale, "%+d", fraction.intValue());
         }
-        return String.format(locale, "%+.2f%%", fraction.multiplyBy(HUNDRED).doubleValue());
+        return String.format(locale, "%+.2f%%", new SafeFraction(fraction).multiplyBy(HUNDRED).doubleValue());
     }
 
     /**

plugin/src/test/java/io/jenkins/plugins/coverage/metrics/model/ElementFormatterTest.java

@@ -0,0 +1,22 @@
+package io.jenkins.plugins.coverage.metrics.model;
+
+import java.util.Locale;
+
+import org.apache.commons.lang3.math.Fraction;
+import org.junit.jupiter.api.Test;
+
+import edu.hm.hafner.coverage.Metric;
+
+import static org.assertj.core.api.Assertions.*;
+
+class ElementFormatterTest {
+    @Test
+    void shouldHandleOverflowGracefully() {
+        var formatter = new ElementFormatter();
+
+        var fraction = Fraction.getFraction(Integer.MAX_VALUE - 1, Integer.MAX_VALUE - 1);
+        var delta = formatter.formatDelta(fraction, Metric.LINE, Locale.ENGLISH);
+
+        assertThat(delta).isEqualTo("+100.00%");
+    }
+}