"Go to Type Declaration" is broken for stdlib types (KT-13001)

#KT-13001Fixed

idea/src/org/jetbrains/kotlin/idea/codeInsight/KotlinTypeDeclarationProvider.kt

@@ -36,8 +36,6 @@ class KotlinTypeDeclarationProvider : TypeDeclarationProvider {
         val type = callableDescriptor.returnType ?: return emptyArray()
 
         val classifierDescriptor = type.constructor.declarationDescriptor ?: return emptyArray()
-        val typeElement = DescriptorToSourceUtils.descriptorToDeclaration(classifierDescriptor) ?: return emptyArray()
+        return DescriptorToSourceUtilsIde.getAllDeclarations(symbol.project, classifierDescriptor).toTypedArray()
-
-        return arrayOf(typeElement)
     }
 }

idea/testData/navigation/gotoTypeDeclaration/builtinTypeStdlib.test

@@ -0,0 +1,8 @@
+// FILE: before.kt
+fun foo(a: Any) {
+    val b = 1
+    foo(<caret>b)
+}
+
+// FILE: after.kt
+public class <caret>Int private constructor() : Number(), Comparable<Int> {

idea/tests/org/jetbrains/kotlin/idea/navigation/AbstractGotoActionTest.kt

@@ -18,12 +18,15 @@ package org.jetbrains.kotlin.idea.navigation
 
 import com.intellij.codeInsight.CodeInsightActionHandler
 import com.intellij.openapi.actionSystem.ActionManager
-import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase
+import com.intellij.openapi.fileEditor.FileEditorManager
+import com.intellij.openapi.fileEditor.ex.FileEditorManagerEx
+import com.intellij.openapi.util.TextRange
 import org.jetbrains.kotlin.idea.KotlinFileType
+import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.junit.Assert
 
-abstract class AbstractGotoActionTest : LightCodeInsightFixtureTestCase() {
+abstract class AbstractGotoActionTest : KotlinLightCodeInsightFixtureTestCase() {
     protected abstract val actionName: String
 
     protected fun doTest(testPath: String) {
@@ -31,12 +34,35 @@ abstract class AbstractGotoActionTest : LightCodeInsightFixtureTestCase() {
 
         myFixture.configureByText(KotlinFileType.INSTANCE, parts[0])
 
-        val gotoSuperAction = ActionManager.getInstance().getAction(actionName) as CodeInsightActionHandler
+        val gotoAction = ActionManager.getInstance().getAction(actionName) as CodeInsightActionHandler
-        gotoSuperAction.invoke(project, myFixture.editor, myFixture.file)
+        gotoAction.invoke(project, myFixture.editor, myFixture.file)
 
-        val text = myFixture.getDocument(myFixture.file).text
+        val fileEditorManager = FileEditorManager.getInstance(myFixture.project) as FileEditorManagerEx
-        val afterText = StringBuilder(text).insert(editor.caretModel.offset, "<caret>").toString()
+        val currentEditor = fileEditorManager.selectedTextEditor ?: editor
 
-        Assert.assertEquals(parts[1], afterText)
+        if (currentEditor == editor) {
+            val text = myFixture.getDocument(myFixture.file).text
+            val afterText = StringBuilder(text).insert(editor.caretModel.offset, "<caret>").toString()
+
+            Assert.assertEquals(parts[1], afterText)
+        }
+        else {
+            val fileOffset = currentEditor.caretModel.offset
+            val lineNumber = currentEditor.document.getLineNumber(fileOffset)
+            val lineStart = currentEditor.document.getLineStartOffset(lineNumber)
+            val lineEnd = currentEditor.document.getLineEndOffset(lineNumber)
+            val inLineOffset = fileOffset - lineStart
+
+            val line = currentEditor.document.getText(TextRange(lineStart, lineEnd))
+            val withCaret = with(StringBuilder()) {
+                append(line)
+                insert(inLineOffset, "<caret>")
+                toString()
+            }
+
+            Assert.assertEquals(parts[1], withCaret)
+        }
     }
+
+    override fun getProjectDescriptor() = getProjectDescriptorFromTestName()
 }

idea/tests/org/jetbrains/kotlin/idea/navigation/GotoTypeDeclarationTestGenerated.java

@@ -36,6 +36,12 @@ public class GotoTypeDeclarationTestGenerated extends AbstractGotoTypeDeclaratio
         KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/navigation/gotoTypeDeclaration"), Pattern.compile("^(.+)\\.test$"), TargetBackend.ANY, true);
     }
 
+    @TestMetadata("builtinTypeStdlib.test")
+    public void testBuiltinTypeStdlib() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/navigation/gotoTypeDeclaration/builtinTypeStdlib.test");
+        doTest(fileName);
+    }
+
     @TestMetadata("explicitParameterInLambda.test")
     public void testExplicitParameterInLambda() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/navigation/gotoTypeDeclaration/explicitParameterInLambda.test");