do not treat lines in bridges and synthetic methods as code lines

README.md

@@ -8,6 +8,10 @@ Read all about it at http://pitest.org
 
 ## Releases
 
+## 1.10.1 (unreleased)
+
+* #1124 Fix bug introduced in 1.10.0 where bridge methods treated as valid lines of code
+
 ## 1.10.0 
 
 * #1067 Improved Quarkus and Roboelectric support

pitest-entry/src/main/java/org/pitest/bytecode/analysis/ClassTree.java

@@ -9,6 +9,7 @@
 import java.util.Set;
 import java.util.function.Function;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.Opcodes;
@@ -83,20 +84,28 @@ public ClassNode rawNode() {
   }
 
   public Set<Integer> codeLineNumbers() {
-    return methods().stream()
+    return realMethods()
             .flatMap(m -> m.instructions().stream()
                     .filter(n -> n instanceof LineNumberNode)
                     .map(n -> ((LineNumberNode) n).line))
             .collect(Collectors.toSet());
   }
 
   public int numberOfCodeLines() {
-    return (int) methods().stream()
+    return (int) realMethods()
             .flatMap(m -> m.instructions().stream()
                     .filter(n -> n instanceof LineNumberNode))
             .count();
   }
 
+  /**
+   * Methods, excluding bridges and synthetics
+   */
+  public Stream<MethodTree> realMethods() {
+      return methods().stream()
+              .filter(m -> !m.isSynthetic() && !m.isBridge());
+  }
+
   public boolean isAbstract() {
     return (this.rawNode.access & Opcodes.ACC_ABSTRACT) != 0;
   }

pitest-entry/src/main/java/org/pitest/bytecode/analysis/MethodTree.java

@@ -58,6 +58,10 @@ public boolean isSynthetic() {
     return (this.rawNode.access & Opcodes.ACC_SYNTHETIC) != 0;
   }
 
+  public boolean isBridge() {
+    return (this.rawNode.access & Opcodes.ACC_BRIDGE) != 0;
+  }
+
   public boolean isPrivate() {
     return (this.rawNode.access & Opcodes.ACC_PRIVATE) != 0;
   }

pitest-entry/src/test/java/org/pitest/bytecode/analysis/ClassTreeTest.java

@@ -1,8 +1,7 @@
 package org.pitest.bytecode.analysis;
 
 import static org.assertj.core.api.Assertions.assertThat;
-
-import java.util.function.Function;
+import static org.objectweb.asm.Opcodes.ACC_SYNTHETIC;
 
 import org.junit.Test;
 import org.pitest.classinfo.ClassByteArraySource;
@@ -57,7 +56,27 @@ public void shouldNotDetectCodeLineAtClassDeclarationsWhenClassHasNoDefaultConst
   @Test
   public void shouldNotRecordLineNumbersFromSyntheticBridgeMethods() {
     ClassTree underTest = ClassTree.fromBytes(bytesFor(Bridge.HasBridgeMethod.class));
-    assertThat(underTest.codeLineNumbers()).doesNotContain(1);
+    assertThat(underTest.codeLineNumbers()).doesNotContain(24);
+  }
+
+  @Test
+  public void shouldNotIncludeBridgeMethodsInCodeLineCount() {
+    ClassTree underTest = ClassTree.fromBytes(bytesFor(Bridge.HasBridgeMethod.class));
+    assertThat(underTest.numberOfCodeLines()).isEqualTo(3);
+  }
+
+  @Test
+  public void realMethodsDoesNotIncludeBridgeMethods() {
+    ClassTree underTest = ClassTree.fromBytes(bytesFor(Bridge.HasBridgeMethod.class));
+    assertThat(underTest.realMethods()).hasSize(underTest.methods().size() - 1);
+  }
+
+  @Test
+  public void realMethodsDoesNotIncludeSynthetics() {
+    ClassTree underTest = ClassTree.fromBytes(bytesFor(ParseMe.class));
+    MethodTree method = underTest.methods().get(0);
+    method.rawNode().access |= ACC_SYNTHETIC;
+    assertThat(underTest.realMethods()).doesNotContain(method);
   }
 
   byte[] bytesFor(Class<?> clazz) {

pitest/src/test/java/org/pitest/coverage/codeassist/samples/Bridge.java

@@ -22,6 +22,11 @@ public T getT() {
   }
 
   public static class HasBridgeMethod extends A<String> {
+
+    HasBridgeMethod() {
+      // so we don't have an autogenerated init also on line 24
+    }
+
     @Override
     public String getT() {
       return null;