From e01b91efe4421256f0b1f3d93909bb2493fcaeba Mon Sep 17 00:00:00 2001
From: Christian Stein <sormuras@gmail.com>
Date: Tue, 22 Aug 2017 05:25:53 +0200
Subject: [PATCH] Set supported Java source level to "9"

Fixes #181
---
 .../googlejavaformat/java/RemoveUnusedImports.java   |  3 +++
 .../java/RemoveUnusedImportsTest.java                | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/core/src/main/java/com/google/googlejavaformat/java/RemoveUnusedImports.java b/core/src/main/java/com/google/googlejavaformat/java/RemoveUnusedImports.java
index b8746d757..bd5ae3167 100644
--- a/core/src/main/java/com/google/googlejavaformat/java/RemoveUnusedImports.java
+++ b/core/src/main/java/com/google/googlejavaformat/java/RemoveUnusedImports.java
@@ -53,6 +53,7 @@
 import org.openjdk.source.util.TreeScanner;
 import org.openjdk.tools.javac.api.JavacTrees;
 import org.openjdk.tools.javac.file.JavacFileManager;
+import org.openjdk.tools.javac.main.Option;
 import org.openjdk.tools.javac.parser.JavacParser;
 import org.openjdk.tools.javac.parser.ParserFactory;
 import org.openjdk.tools.javac.tree.DCTree;
@@ -195,6 +196,8 @@ public Void visitIdentifier(IdentifierTree node, Void aVoid) {
   public static String removeUnusedImports(
       final String contents, JavadocOnlyImports javadocOnlyImports) {
     Context context = new Context();
+    // TODO(cushon): this should default to the latest supported source level, same as in Formatter
+    Options.instance(context).put(Option.SOURCE, "9");
     JCCompilationUnit unit = parse(context, contents);
     if (unit == null) {
       // error handling is done during formatting
diff --git a/core/src/test/java/com/google/googlejavaformat/java/RemoveUnusedImportsTest.java b/core/src/test/java/com/google/googlejavaformat/java/RemoveUnusedImportsTest.java
index 0da12b701..b9e2c267a 100644
--- a/core/src/test/java/com/google/googlejavaformat/java/RemoveUnusedImportsTest.java
+++ b/core/src/test/java/com/google/googlejavaformat/java/RemoveUnusedImportsTest.java
@@ -329,6 +329,18 @@ public static Collection<Object[]> parameters() {
           "public class Test implements Foo, Bar, Baz, Bork {}",
         },
       },
+      {
+        {
+          "import java.lang.Foo;", //
+          "interface Test { private static void foo() {} }",
+        },
+        {
+          "interface Test { private static void foo() {} }",
+        },
+        {
+          "interface Test { private static void foo() {} }",
+        },
+      },
     };
     ImmutableList.Builder<Object[]> builder = ImmutableList.builder();
     for (String[][] inputAndOutput : inputsOutputs) {