Test quickfixes for updating language/API version and coroutine support in Gradle projects

idea/testData/gradle/languageFeature/enableCoroutines/build.gradle

@@ -0,0 +1,18 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}

idea/testData/gradle/languageFeature/enableCoroutines/build.gradle.after

@@ -0,0 +1,23 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+kotlin {
+    experimental {
+        coroutines "enable"
+    }
+}

idea/testData/gradle/languageFeature/enableCoroutines/src.kt

@@ -0,0 +1,2 @@
+suspend fun foo() {
+}

idea/testData/gradle/languageFeature/updateApiVersion/build.gradle

@@ -0,0 +1,22 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.apiVersion = "1.0"
+}

idea/testData/gradle/languageFeature/updateApiVersion/build.gradle.after

@@ -0,0 +1,22 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.apiVersion = "1.1"
+}

idea/testData/gradle/languageFeature/updateApiVersion/src.kt

@@ -0,0 +1 @@
+val x = <caret>"s"::length

idea/testData/gradle/languageFeature/updateLanguageAndApiVersion/build.gradle

@@ -0,0 +1,23 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.languageVersion = "1.0"
+    kotlinOptions.apiVersion = "1.0"
+}

idea/testData/gradle/languageFeature/updateLanguageAndApiVersion/build.gradle.after

@@ -0,0 +1,23 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.languageVersion = "1.1"
+    kotlinOptions.apiVersion = "1.1"
+}

idea/testData/gradle/languageFeature/updateLanguageAndApiVersion/src.kt

@@ -0,0 +1 @@
+val x = <caret>"s"::length

idea/testData/gradle/languageFeature/updateLanguageVersion/build.gradle

@@ -0,0 +1,22 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.languageVersion = "1.0"
+}

idea/testData/gradle/languageFeature/updateLanguageVersion/build.gradle.after

@@ -0,0 +1,22 @@
+group 'Again'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+apply plugin: 'kotlin'
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.0"
+}
+
+compileKotlin {
+    kotlinOptions.languageVersion = "1.1"
+}

idea/testData/gradle/languageFeature/updateLanguageVersion/src.kt

@@ -0,0 +1 @@
+val x get() = 1

idea/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/ExternalSystemTestCase.java

@@ -55,7 +55,7 @@ import java.util.List;
 public abstract class ExternalSystemTestCase extends UsefulTestCase {
   private File ourTempDir;
 
-  private IdeaProjectTestFixture myTestFixture;
+  protected IdeaProjectTestFixture myTestFixture;
 
   protected Project myProject;
 
@@ -141,7 +141,7 @@ public abstract class ExternalSystemTestCase extends UsefulTestCase {
 
   protected abstract String getTestsTempDir();
 
-  private void setUpFixtures() throws Exception {
+  protected void setUpFixtures() throws Exception {
     myTestFixture = IdeaTestFixtureFactory.getFixtureFactory().createFixtureBuilder(getName()).getFixture();
     myTestFixture.setUp();
   }
@@ -176,7 +176,7 @@ public abstract class ExternalSystemTestCase extends UsefulTestCase {
     }
   }
 
-  private void tearDownFixtures() throws Exception {
+  protected void tearDownFixtures() throws Exception {
     myTestFixture.tearDown();
     myTestFixture = null;
   }

idea/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/GradleLanguageFeatureQuickFixTest.kt

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2010-2017 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.idea.codeInsight.gradle
+
+import com.intellij.openapi.fileEditor.FileDocumentManager
+import com.intellij.openapi.fileEditor.impl.LoadTextUtil
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.rt.execution.junit.FileComparisonFailure
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import com.intellij.testFramework.fixtures.IdeaTestFixtureFactory
+import org.jetbrains.kotlin.idea.test.PluginTestCaseBase
+import org.jetbrains.kotlin.test.testFramework.runInEdtAndWait
+import org.junit.Test
+import java.io.File
+import kotlin.reflect.KMutableProperty0
+
+class GradleLanguageFeatureQuickFixTest : GradleImportingTestCase() {
+    private lateinit var codeInsightTestFixture: CodeInsightTestFixture
+
+    fun getTestDataPath() = PluginTestCaseBase.getTestDataPathBase() + "/gradle/languageFeature/" + getTestName(true).substringBefore('_')
+
+    override fun setUpFixtures() {
+        myTestFixture = IdeaTestFixtureFactory.getFixtureFactory().createFixtureBuilder(getName()).fixture
+        codeInsightTestFixture = IdeaTestFixtureFactory.getFixtureFactory().createCodeInsightFixture(myTestFixture)
+        codeInsightTestFixture.setUp()
+    }
+
+    override fun tearDownFixtures() {
+        codeInsightTestFixture.tearDown()
+        (this::codeInsightTestFixture as KMutableProperty0<CodeInsightTestFixture?>).set(null)
+        myTestFixture = null
+    }
+
+    @Test fun testUpdateLanguageVersion() {
+        doTest("Set module language version to 1.1")
+    }
+
+    @Test fun testUpdateApiVersion() {
+        doTest("Set module API version to 1.1")
+    }
+
+    @Test fun testUpdateLanguageAndApiVersion() {
+        doTest("Set module language version to 1.1")
+    }
+
+    @Test fun testEnableCoroutines() {
+        doTest("Enable coroutine support in the current module")
+    }
+
+    private fun doTest(intentionName: String) {
+        val buildGradleVFile = createProjectSubFile("build.gradle", File(getTestDataPath(), "build.gradle").readText())
+        importProject()
+        runInEdtAndWait {
+            val sourceVFile = createProjectSubFile("src/main/kotlin/src.kt", File(getTestDataPath(), "src.kt").readText())
+            codeInsightTestFixture.configureFromExistingVirtualFile(sourceVFile)
+            codeInsightTestFixture.launchAction(codeInsightTestFixture.findSingleIntention(intentionName))
+            FileDocumentManager.getInstance().saveAllDocuments()
+            checkResult(buildGradleVFile)
+        }
+    }
+
+    private fun checkResult(file: VirtualFile) {
+        val expectedPath = File(getTestDataPath(), "build.gradle.after")
+        val expectedContent = expectedPath.readText()
+        val actualContent = LoadTextUtil.loadText(file).toString()
+        if (actualContent != expectedContent) {
+            throw FileComparisonFailure("build.gradle doesn't match", expectedContent, actualContent, expectedPath.path)
+        }
+    }
+}