Move getElement() tests from AbstractResynthesizeTest mixin into AST resynthesizer tests.

pkg/analyzer/test/src/summary/resynthesize_ast_test.dart

Index: pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart b/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
index b1cdf8edbfb841c6ff57f09321400eb3772576ab..28689c56aa08b87ec6b2bf1e760167ddef2660f2 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
@@ -271,8 +271,111 @@ abstract class _ResynthesizeAstTest extends ResynthesizeTest
   AnalysisOptionsImpl createOptions() =>
       super.createOptions()..strongMode = isStrongMode;
 
-  @override
-  TestSummaryResynthesizer encodeDecodeLibrarySource(Source source) {
+  test_getElement_constructor_named() async {
+    String text = 'class C { C.named(); }';
+    Source source = addLibrarySource('/test.dart', text);
+    ConstructorElement original = context
+        .computeLibraryElement(source)
+        .getType('C')
+        .getNamedConstructor('named');
+    expect(original, isNotNull);
+    ConstructorElement resynthesized = _validateGetElement(text, original);
+    compareConstructorElements(resynthesized, original, 'C.constructor named');
+  }
+
+  test_getElement_constructor_unnamed() async {
+    String text = 'class C { C(); }';
+    Source source = addLibrarySource('/test.dart', text);
+    ConstructorElement original =
+        context.computeLibraryElement(source).getType('C').unnamedConstructor;
+    expect(original, isNotNull);
+    ConstructorElement resynthesized = _validateGetElement(text, original);
+    compareConstructorElements(resynthesized, original, 'C.constructor');
+  }
+
+  test_getElement_field() async {
+    String text = 'class C { var f; }';
+    Source source = addLibrarySource('/test.dart', text);
+    FieldElement original =
+        context.computeLibraryElement(source).getType('C').getField('f');
+    expect(original, isNotNull);
+    FieldElement resynthesized = _validateGetElement(text, original);
+    compareFieldElements(resynthesized, original, 'C.field f');
+  }
+
+  test_getElement_getter() async {
+    String text = 'class C { get f => null; }';
+    Source source = addLibrarySource('/test.dart', text);
+    PropertyAccessorElement original =
+        context.computeLibraryElement(source).getType('C').getGetter('f');
+    expect(original, isNotNull);
+    PropertyAccessorElement resynthesized = _validateGetElement(text, original);
+    comparePropertyAccessorElements(resynthesized, original, 'C.getter f');
+  }
+
+  test_getElement_method() async {
+    String text = 'class C { f() {} }';
+    Source source = addLibrarySource('/test.dart', text);
+    MethodElement original =
+        context.computeLibraryElement(source).getType('C').getMethod('f');
+    expect(original, isNotNull);
+    MethodElement resynthesized = _validateGetElement(text, original);
+    compareMethodElements(resynthesized, original, 'C.method f');
+  }
+
+  test_getElement_operator() async {
+    String text = 'class C { operator+(x) => null; }';
+    Source source = addLibrarySource('/test.dart', text);
+    MethodElement original =
+        context.computeLibraryElement(source).getType('C').getMethod('+');
+    expect(original, isNotNull);
+    MethodElement resynthesized = _validateGetElement(text, original);
+    compareMethodElements(resynthesized, original, 'C.operator+');
+  }
+
+  test_getElement_setter() async {
+    String text = 'class C { void set f(value) {} }';
+    Source source = addLibrarySource('/test.dart', text);
+    PropertyAccessorElement original =
+        context.computeLibraryElement(source).getType('C').getSetter('f');
+    expect(original, isNotNull);
+    PropertyAccessorElement resynthesized = _validateGetElement(text, original);
+    comparePropertyAccessorElements(resynthesized, original, 'C.setter f');
+  }
+
+  test_getElement_unit() async {
+    String text = 'class C { f() {} }';
+    Source source = addLibrarySource('/test.dart', text);
+    CompilationUnitElement original =
+        context.computeLibraryElement(source).definingCompilationUnit;
+    expect(original, isNotNull);
+    CompilationUnitElement resynthesized = _validateGetElement(text, original);
+    compareCompilationUnitElements(resynthesized, original);
+  }
+
+  /**
+   * Return a [SummaryResynthesizer] to resynthesize the library with the
+   * given [Source].
+   */
+  TestSummaryResynthesizer _encodeDecodeLibrarySource(Source source) {
     return _encodeLibrary(source);
   }
+
+  /**
+   * Encode the library containing [original] into a summary and then use
+   * [TestSummaryResynthesizer.getElement] to retrieve just the original
+   * element from the resynthesized summary.
+   */
+  Element _validateGetElement(String text, Element original) {
+    SummaryResynthesizer resynthesizer =
+        _encodeDecodeLibrarySource(original.library.source);
+    ElementLocationImpl location = original.location;
+    Element result = resynthesizer.getElement(location);
+    checkMinimalResynthesisWork(resynthesizer, original.library);
+    // Check that no other summaries needed to be resynthesized to resynthesize
+    // the library element.
+    expect(resynthesizer.resynthesisCount, 3);
+    expect(result.location, location);
+    return result;
+  }
 }