Compute explicit imports

pkg/analyzer/test/src/task/dart_test.dart

Index: pkg/analyzer/test/src/task/dart_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_test.dart b/pkg/analyzer/test/src/task/dart_test.dart
index c2a5ea5350c6cef6aba5de584734f4e818bbed52..c2cfe5c370454c6d7e15d8da9ebc2b587a456296 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -1469,7 +1469,8 @@ class ParseDartTaskTest extends _AbstractDartTaskTest {
     _performParseTask(r'''
 part of lib;
 class B {}''');
-    expect(outputs, hasLength(7));
+    expect(outputs, hasLength(8));
+    expect(outputs[EXPLICITLY_IMPORTED_LIBRARIES], hasLength(0));
     expect(outputs[EXPORTED_LIBRARIES], hasLength(0));
     _assertHasCore(outputs[IMPORTED_LIBRARIES], 1);
     expect(outputs[INCLUDED_PARTS], hasLength(0));
@@ -1487,7 +1488,8 @@ import '://invaliduri.dart';
 export '${a}lib3.dart';
 part 'part.dart';
 class A {}''');
-    expect(outputs, hasLength(7));
+    expect(outputs, hasLength(8));
+    expect(outputs[EXPLICITLY_IMPORTED_LIBRARIES], hasLength(1));
     expect(outputs[EXPORTED_LIBRARIES], hasLength(0));
     _assertHasCore(outputs[IMPORTED_LIBRARIES], 2);
     expect(outputs[INCLUDED_PARTS], hasLength(1));
@@ -1504,7 +1506,8 @@ import 'lib2.dart';
 export 'lib3.dart';
 part 'part.dart';
 class A {''');
-    expect(outputs, hasLength(7));
+    expect(outputs, hasLength(8));
+    expect(outputs[EXPLICITLY_IMPORTED_LIBRARIES], hasLength(1));
     expect(outputs[EXPORTED_LIBRARIES], hasLength(1));
     _assertHasCore(outputs[IMPORTED_LIBRARIES], 2);
     expect(outputs[INCLUDED_PARTS], hasLength(1));