Fix for Import/ExportDirective annotations while applying resynthesized element model.

pkg/analyzer/test/generated/declaration_resolver_test.dart

Index: pkg/analyzer/test/generated/declaration_resolver_test.dart
diff --git a/pkg/analyzer/test/generated/declaration_resolver_test.dart b/pkg/analyzer/test/generated/declaration_resolver_test.dart
index 869d7e0e25b4302c00d727cfe5e48d5060fbe7ae..e75079841dbfefcfcf7cca62baa3a5ecad2260b4 100644
--- a/pkg/analyzer/test/generated/declaration_resolver_test.dart
+++ b/pkg/analyzer/test/generated/declaration_resolver_test.dart
@@ -101,6 +101,33 @@ class DeclarationResolverMetadataTest extends ResolverTestCase {
     checkMetadata('export');
   }
 
+  void test_metadata_exportDirective_resynthesized() {
+    CompilationUnit unit = resolveSource(r'''
+@a
+export "dart:async";
+
+@b
+export "dart:math";
+
+const a = null;
+const b = null;
+''');
+    expect(unit.directives[0].metadata.single.name.name, 'a');
+    expect(unit.directives[1].metadata.single.name.name, 'b');
+    var unitElement = unit.element as CompilationUnitElementImpl;
+    // Damage the unit element - as if "setAnnotations" were not called.
+    // The ImportElement(s) still have the metadata, we should use it.
+    unitElement.setAnnotations(unit.directives[0].offset, []);
+    unitElement.setAnnotations(unit.directives[1].offset, []);
+    expect(unitElement.library.exports[0].metadata, hasLength(1));
+    expect(unitElement.library.exports[1].metadata, hasLength(1));
+    // DeclarationResolver on the clone should succeed.
+    CompilationUnit clonedUnit = AstCloner.clone(unit);
+    new DeclarationResolver().resolve(clonedUnit, unit.element);
+    expect(unit.directives[0].metadata.single.name.name, 'a');
+    expect(unit.directives[1].metadata.single.name.name, 'b');
+  }
+
   void test_metadata_fieldDeclaration() {
     setupCode('class C { @a int x; }');
     checkMetadata('x');
@@ -163,6 +190,33 @@ class DeclarationResolverMetadataTest extends ResolverTestCase {
     checkMetadata('import');
   }
 
+  void test_metadata_importDirective_resynthesized() {
+    CompilationUnit unit = resolveSource(r'''
+@a
+import "dart:async";
+
+@b
+import "dart:math";
+
+const a = null;
+const b = null;
+''');
+    expect(unit.directives[0].metadata.single.name.name, 'a');
+    expect(unit.directives[1].metadata.single.name.name, 'b');
+    var unitElement = unit.element as CompilationUnitElementImpl;
+    // Damage the unit element - as if "setAnnotations" were not called.
+    // The ImportElement(s) still have the metadata, we should use it.
+    unitElement.setAnnotations(unit.directives[0].offset, []);
+    unitElement.setAnnotations(unit.directives[1].offset, []);
+    expect(unitElement.library.imports[0].metadata, hasLength(1));
+    expect(unitElement.library.imports[1].metadata, hasLength(1));
+    // DeclarationResolver on the clone should succeed.
+    CompilationUnit clonedUnit = AstCloner.clone(unit);
+    new DeclarationResolver().resolve(clonedUnit, unit.element);
+    expect(unit.directives[0].metadata.single.name.name, 'a');
+    expect(unit.directives[1].metadata.single.name.name, 'b');
+  }
+
   void test_metadata_libraryDirective() {
     setupCode('@a library L;');
     checkMetadata('L');