add test for ReferencesSearch; use standard isReferenceTo() API (which is the same thing for Kotlin but more efficient for non-Kotlin references)

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/JetSimpleNameReference.kt

@@ -171,4 +171,6 @@ public class JetSimpleNameReference(
     override fun toString(): String {
         return javaClass<JetSimpleNameReference>().getSimpleName() + ": " + expression.getText()
     }
+
+    override fun getCanonicalText(): String = expression.getText()
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/search/ideaExtensions/KotlinReferencesSearcher.kt

@@ -53,7 +53,7 @@ public class KotlinReferencesSearcher : QueryExecutorBase<PsiReference, Referenc
 
                     when {
                         !ReferenceRange.containsOffsetInElement(ref, offsetInElement) -> true
-                        !ref.matchesTarget(unwrappedElement) -> true
+                        !ref.isReferenceTo(unwrappedElement) -> true
                         else -> consumer.process(ref)
                     }
                 }
@@ -73,20 +73,12 @@ public class KotlinReferencesSearcher : QueryExecutorBase<PsiReference, Referenc
         public fun processJetClassOrObject(element: JetClassOrObject, queryParameters: ReferencesSearch.SearchParameters) {
             val className = element.getName()
             if (className != null) {
-                val lightClass = ApplicationManager.getApplication().runReadAction<PsiClass>(object : Computable<PsiClass?> {
-                    override fun compute(): PsiClass? {
-                        return LightClassUtil.getPsiClass(element)
-                    }
-                })
+                val lightClass = runReadAction { LightClassUtil.getPsiClass(element) }
                 if (lightClass != null) {
                     searchNamedElement(queryParameters, lightClass, className)
 
                     if (element is JetObjectDeclaration && element.isCompanion()) {
-                        val fieldForCompanionObject = ApplicationManager.getApplication().runReadAction<PsiField>(object : Computable<PsiField?> {
-                            override fun compute(): PsiField? {
-                                return LightClassUtil.getLightFieldForCompanionObject(element)
-                            }
-                        })
+                        val fieldForCompanionObject = runReadAction { LightClassUtil.getLightFieldForCompanionObject(element) }
                         if (fieldForCompanionObject != null) {
                             searchNamedElement(queryParameters, fieldForCompanionObject)
                         }

idea/testData/search/references/testParam.kt

@@ -0,0 +1,8 @@
+data class A(val <caret>n: Int, val s: String, val o: Any)
+
+fun test() {
+    val a = A(1, "2", Any())
+    a.n
+    a.component1()
+    val (x, y, z) = a
+}

idea/testData/search/references/testPlus.kt

@@ -0,0 +1,12 @@
+class A() {
+    fun p<caret>lus(rhs: A): A {
+        return A()
+    }
+}
+
+val a1 = A()
+val a2 = A()
+val a3 = a1 + a2
+val a4 = a1.plus(a2)
+val a5 = a1 plus a2
+

idea/tests/org/jetbrains/kotlin/search/KotlinReferencesSearchTest.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.kotlin.search
+
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiReference
+import com.intellij.psi.search.searches.ReferencesSearch
+import org.jetbrains.kotlin.idea.references.JetMultiDeclarationReference
+import org.jetbrains.kotlin.idea.test.PluginTestCaseBase
+import org.jetbrains.kotlin.psi.JetFunction
+import org.jetbrains.kotlin.psi.JetParameter
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
+import org.junit.Assert
+import java.io.File
+
+public class KotlinReferencesSearchTest(): AbstractSearcherTest() {
+    override fun getTestDataPath(): String {
+        return File(PluginTestCaseBase.getTestDataPathBase(), "/search/references").getPath() + File.separator
+    }
+
+    public fun testPlus() {
+        val refs = doTest<JetFunction>()
+        Assert.assertEquals(3, refs.size())
+        Assert.assertEquals("+", refs[0].getCanonicalText())
+        Assert.assertEquals("plus", refs[1].getCanonicalText())
+        Assert.assertEquals("plus", refs[2].getCanonicalText())
+    }
+
+    public fun testParam() {
+        val refs = doTest<JetParameter>()
+        Assert.assertEquals(3, refs.size())
+        Assert.assertEquals("n", refs[0].getCanonicalText())
+        Assert.assertEquals("component1", refs[1].getCanonicalText())
+        Assert.assertTrue(refs[2] is JetMultiDeclarationReference)
+    }
+
+    private inline fun doTest<reified T: PsiElement>(): List<PsiReference> {
+        myFixture.configureByFile(getFileName())
+        val func = myFixture.getElementAtCaret().getParentOfType<T>(false)!!
+        return ReferencesSearch.search(func).findAll().sortBy { it.getElement().getTextRange().getStartOffset() }
+    }
+}