Issue 8742. Preserve leading line comments during java2dart translation.

editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java

Index: editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java
diff --git a/editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java b/editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java
index 0c8280c62ad31468b3690135f10919afaf28820c..031bfc42f471d9c4cfb8775b98196a509ec42636 100644
--- a/editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java
+++ b/editor/util/plugins/com.google.dart.java2dart_test/src/com/google/dart/java2dart/SyntaxTranslatorTest.java
@@ -198,6 +198,50 @@ public class SyntaxTranslatorTest extends AbstractSemanticTest {
         "}");
   }
 
+  public void test_commentLine_beforeStatement_blockStyle() throws Exception {
+    parseJava(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "public class A {",
+        "  void main() {",
+        "    /*",
+        "     * aaa",
+        "     * bbb",
+        "     */",
+        "    int v = 0;",
+        "  }",
+        "}");
+    assertDartSource(
+        "class A {",
+        "  void main() {",
+        "    /*",
+        "     * aaa",
+        "     * bbb",
+        "     */",
+        "    int v = 0;",
+        "  }",
+        "}");
+  }
+
+  public void test_commentLine_beforeStatement_lineStyle() throws Exception {
+    parseJava(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "public class A {",
+        "  void main() {",
+        "    // aaa",
+        "    // bbb",
+        "    int v = 0;",
+        "  }",
+        "}");
+    assertDartSource(
+        "class A {",
+        "  void main() {",
+        "    // aaa",
+        "    // bbb",
+        "    int v = 0;",
+        "  }",
+        "}");
+  }
+
   public void test_constructor() throws Exception {
     parseJava(
         "// filler filler filler filler filler filler filler filler filler filler",