Issue 25542. If an element does not have its own documentation, use the documentation from the over…

pkg/analysis_server/test/analysis/get_hover_test.dart

Index: pkg/analysis_server/test/analysis/get_hover_test.dart
diff --git a/pkg/analysis_server/test/analysis/get_hover_test.dart b/pkg/analysis_server/test/analysis/get_hover_test.dart
index cc1a4e47786f88267bad2c148274c7eea77a98b8..39e14e7c0fb5c26483f675bd7619fbe4b0f3f851 100644
--- a/pkg/analysis_server/test/analysis/get_hover_test.dart
+++ b/pkg/analysis_server/test/analysis/get_hover_test.dart
@@ -96,6 +96,36 @@ main() {
     expect(hover.dartdoc, '''doc aaa\ndoc bbb''');
   }
 
+  test_dartdoc_inherited_methodByMethod_fromInterface() async {

[Brian Wilkerson, 2016/01/25 22:09:59]

I'll suggest a couple more tests.

(1) Indirectly overridden:

class A {
  // my doc
  m() {}
}
class B extends A {
  m() {}
}
class C extends B {
  m() {}
}

I would expect hovering over C.m to return the docs for A.m.

(2) Class over interface:

class A {
  // my doc
  m() {}
}
class B extends A {
}
class I {
  // wrong doc
  m() {}
}
class C extends B implements I {
  m() {}
}

I would expect hovering over C.m to return the doc for A.m.

[scheglov, 2016/01/26 00:52:50]

Done.

[scheglov, 2016/01/26 00:52:50]

Done.

+    addTestFile('''
+class A {
+  /// my doc
+  m() {} // in A
+}
+
+class B implements A {
+  m() {} // in B
+}
+''');
+    HoverInformation hover = await prepareHover('m() {} // in B');
+    expect(hover.dartdoc, '''my doc\n\nCopied from `A`.''');
+  }
+
+  test_dartdoc_inherited_methodByMethod_fromSuper() async {
+    addTestFile('''
+class A {
+  /// my doc
+  m() {} // in A
+}
+
+class B extends A {
+  m() {} // in B
+}
+''');
+    HoverInformation hover = await prepareHover('m() {} // in B');
+    expect(hover.dartdoc, '''my doc\n\nCopied from `A`.''');
+  }
+
   test_enum() async {
     addTestFile('''
 enum MyEnum {AAA, BBB, CCC}