Address review comments

error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/util/MoreASTHelpers.java

@@ -7,7 +7,6 @@
 import com.sun.source.tree.ClassTree;
 import com.sun.source.tree.MethodTree;
 import com.sun.source.tree.Tree;
-import javax.lang.model.element.Name;
 
 /**
  * A set of helper methods for working with the AST.
@@ -20,12 +19,13 @@ private MoreASTHelpers() {}
   /**
    * Finds methods with the given name in the given class.
    *
-   * @param enclosingClass The class to search in.
    * @param methodName The method name to search for.
+   * @param state A {@link VisitorState} describing the context in which the given {@link Tree} is
+   *     found.
    * @return The {@link MethodTree}s of the methods with the given name in the given class.
    */
-  public static ImmutableList<MethodTree> findMethods(ClassTree enclosingClass, String methodName) {
-    return enclosingClass.getMembers().stream()
+  public static ImmutableList<MethodTree> findMethods(String methodName, VisitorState state) {
+    return state.findEnclosing(ClassTree.class).getMembers().stream()
         .filter(MethodTree.class::isInstance)
         .map(MethodTree.class::cast)
         .filter(method -> method.getName().contentEquals(methodName))
@@ -41,11 +41,6 @@ public static ImmutableList<MethodTree> findMethods(ClassTree enclosingClass, St
    * @return Whether there are any methods with the given name in the given class.
    */
   public static boolean isMethodInEnclosingClass(String methodName, VisitorState state) {
-    return state.findEnclosing(ClassTree.class).getMembers().stream()
-        .filter(MethodTree.class::isInstance)
-        .map(MethodTree.class::cast)
-        .map(MethodTree::getName)
-        .map(Name::toString)
-        .anyMatch(methodName::equals);
+    return !findMethods(methodName, state).isEmpty();
   }
 }

error-prone-contrib/src/main/java/tech/picnic/errorprone/bugpatterns/util/MoreJUnitMatchers.java

@@ -1,7 +1,6 @@
 package tech.picnic.errorprone.bugpatterns.util;
 
 import static com.google.errorprone.matchers.ChildMultiMatcher.MatchType.AT_LEAST_ONE;
-import static com.google.errorprone.matchers.Matchers.allOf;
 import static com.google.errorprone.matchers.Matchers.annotations;
 import static com.google.errorprone.matchers.Matchers.anyOf;
 import static com.google.errorprone.matchers.Matchers.isType;
@@ -20,7 +19,7 @@
 import javax.lang.model.type.TypeKind;
 
 /**
- * A set of JUnit Jupiter-specific helper methods and {@link Matcher Matchers}.
+ * A set of JUnit-specific helper methods and {@link Matcher Matchers}.
  *
  * <p>These are additions to the ones from {@link com.google.errorprone.matchers.JUnitMatchers}.
  */
@@ -47,7 +46,7 @@ public final class MoreJUnitMatchers {
    * Matches methods that have a {@link org.junit.jupiter.params.provider.MethodSource} annotation.
    */
   public static final Matcher<MethodTree> HAS_METHOD_SOURCE =
-      allOf(annotations(AT_LEAST_ONE, isType("org.junit.jupiter.params.provider.MethodSource")));
+      annotations(AT_LEAST_ONE, isType("org.junit.jupiter.params.provider.MethodSource"));
 
   private MoreJUnitMatchers() {}