wip (testcompat layer)

Author: Tomasz Pasternak

testing/BUILD

@@ -148,10 +148,12 @@ java_library(
         "intellij-2024.1": glob([
             "testcompat/v241/com/google/idea/sdkcompat/**/*.java",
             "testcompat/v241/com/google/idea/testing/**/*.java",
+            "testcompat/v241/com/google/idea/java/**/*.java",
         ]),
         "intellij-ue-2024.1": glob([
             "testcompat/v241/com/google/idea/sdkcompat/**/*.java",
             "testcompat/v241/com/google/idea/testing/**/*.java",
+            "testcompat/v241/com/google/idea/java/**/*.java",
         ]),
         "default": [],
     }),

testing/testcompat/v241/com/google/idea/java/JavaSdkCompat.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 The Bazel Authors. All rights reserved.
+ *
+ * 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 com.google.idea.java;
+
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.projectRoots.Sdk;
+import com.intellij.pom.java.LanguageLevel;
+import com.intellij.testFramework.IdeaTestUtil;
+
+/**
+ * Provides SDK compatibility shims for base plugin API classes, available to all IDEs during
+ * test-time.
+ */
+public final class JavaSdkCompat {
+  private JavaSdkCompat() {}
+
+  /** #api233  to inline */
+  public static Sdk getUniqueMockJdk(LanguageLevel languageLevel) {
+    var jdk = IdeaTestUtil.getMockJdk(languageLevel.toJavaVersion());
+    var modificator = jdk.getSdkModificator();
+    modificator.setHomePath(jdk.getHomePath() + "." + jdk.hashCode());
+    modificator.setName(jdk.getName() + "." + jdk.hashCode());
+    ApplicationManager.getApplication().runWriteAction(modificator::commitChanges);
+    return jdk;
+  }
+
+  /** #api233 to remove */
+  public static Sdk getNonJavaMockSdk() {
+    throw new RuntimeException("Not supported in 2024.1 or newer");
+  }
+}