content: /*
   * Copyright 2016 HuntBugs contributors
   * 
   * 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 one.util.huntbugs.detect;
  
  import java.util.stream.StreamSupport;
  
  import com.strobel.assembler.ir.ConstantPool.TypeInfoEntry;
  import com.strobel.assembler.metadata.MethodReference;
  import com.strobel.assembler.metadata.TypeDefinition;
  import com.strobel.decompiler.ast.AstCode;
  import com.strobel.decompiler.ast.Expression;
  
  import one.util.huntbugs.registry.MethodContext;
  import one.util.huntbugs.registry.anno.AstNodes;
  import one.util.huntbugs.registry.anno.AstVisitor;
  import one.util.huntbugs.registry.anno.ClassVisitor;
  import one.util.huntbugs.registry.anno.WarningDefinition;
  import one.util.huntbugs.util.Exprs;
  import one.util.huntbugs.util.Nodes;
  
  /**
   * @author Tagir Valeev
   *
   */
  @WarningDefinition(category = "RedundantCode", name = "UselessEasyMockCall", maxScore = 50)
  public class EasyMockProblems {
      @ClassVisitor
      public boolean check(TypeDefinition td) {
          return StreamSupport.stream(td.getConstantPool().spliterator(), false).anyMatch(
              entry -> entry instanceof TypeInfoEntry && ((TypeInfoEntry) entry).getName().startsWith("org/easymock/"));
      }
  
      @AstVisitor(nodes = AstNodes.EXPRESSIONS)
      public void visit(Expression expr, MethodContext mc) {
          if (expr.getCode() == AstCode.InvokeStatic) {
              MethodReference mr = (MethodReference) expr.getOperand();
              if (mr.getDeclaringType().getInternalName().equals("org/easymock/EasyMock")
                  && (mr.getName().equals("replay") || mr.getName().equals("verify") || mr.getName().startsWith("reset"))
                  && mr.getErasedSignature().equals("([Ljava/lang/Object;)V")) {
                  Expression child = Exprs.getChild(expr, 0);
                  if (child.getCode() == AstCode.InitArray && child.getArguments().isEmpty()
                      || child.getCode() == AstCode.NewArray
                      && Integer.valueOf(0).equals(Nodes.getConstant(child.getArguments().get(0)))) {
                      mc.report("UselessEasyMockCall", 0, expr);
                  }
              }
          }
      }
  }
  