[groovy] 2.5 support tap method (IDEA-200196)

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/psi/util/GdkMethodUtil.java

@@ -117,7 +117,7 @@ public class GdkMethodUtil {
   }
 
   public static boolean isWithName(String name) {
-    return WITH.equals(name) || IDENTITY.equals(name);
+    return WITH.equals(name) || IDENTITY.equals(name) || "tap".equals(name);
   }
 
   @Nullable

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/Groovy25ResolveTest.groovy

@@ -0,0 +1,25 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package org.jetbrains.plugins.groovy.lang.resolve
+
+import groovy.transform.CompileStatic
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrAccessorMethod
+import org.jetbrains.plugins.groovy.util.Groovy25Test
+import org.jetbrains.plugins.groovy.util.ResolveTest
+import org.junit.Test
+
+@CompileStatic
+class Groovy25ResolveTest extends Groovy25Test implements ResolveTest {
+
+  @Test
+  void 'tap'() {
+    def expression = elementUnderCaret '''\
+class A { def prop }
+new A().tap { <caret>prop = 1 }
+''', GrReferenceExpression
+    def reference = expression.LValueReference
+    assert reference != null
+    def resolved = reference.resolve()
+    assert resolved instanceof GrAccessorMethod
+  }
+}

plugins/groovy/test/org/jetbrains/plugins/groovy/util/BaseTest.java

@@ -1,11 +1,17 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package org.jetbrains.plugins.groovy.util;
 
+import com.intellij.psi.PsiElement;
 import com.intellij.testFramework.fixtures.CodeInsightTestFixture;
 import com.intellij.util.ArrayUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.plugins.groovy.lang.psi.GroovyFile;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
 
+import java.util.Objects;
+
+import static com.intellij.psi.util.PsiTreeUtil.getParentOfType;
+
 public interface BaseTest {
 
   @NotNull
@@ -18,4 +24,11 @@ public interface BaseTest {
   default GrExpression configureByExpression(@NotNull String text) {
     return (GrExpression)ArrayUtil.getLastElement(configureByText(text).getStatements());
   }
+
+  @NotNull
+  default <T extends PsiElement> T elementUnderCaret(@NotNull String text, @NotNull Class<T> clazz) {
+    GroovyFile file = configureByText(text);
+    T element = getParentOfType(file.findElementAt(getFixture().getCaretOffset()), clazz);
+    return Objects.requireNonNull(element);
+  }
 }

plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy25Test.groovy

@@ -0,0 +1,22 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package org.jetbrains.plugins.groovy.util
+
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import groovy.transform.CompileStatic
+import org.jetbrains.annotations.NotNull
+import org.jetbrains.plugins.groovy.GroovyProjectDescriptors
+import org.junit.Rule
+import org.junit.rules.RuleChain
+import org.junit.rules.TestRule
+
+@CompileStatic
+abstract class Groovy25Test {
+
+  private final FixtureRule myFixtureRule = new FixtureRule(GroovyProjectDescriptors.GROOVY_2_5, '')
+  public final @Rule TestRule myRules = RuleChain.outerRule(myFixtureRule).around(new EdtRule())
+
+  @NotNull
+  CodeInsightTestFixture getFixture() {
+    myFixtureRule.fixture
+  }
+}