[analysis_server] Dot shorthands: Go to definition tests.

Tests with dot shorthand invocations, constructor invocations and property accesses for the go to definition feature.

Bug: #59836
Change-Id: If8f7d85d273299d7a5c6c7cddaffc59cd41eb2fb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/431780
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Kallen Tu <[email protected]>

Author: kallentu

pkg/analysis_server/test/lsp/definition_test.dart

@@ -363,6 +363,90 @@ class [!A!] {
     );
   }
 
+  Future<void> test_dotShorthand_constructor_named() async {
+    var contents = '''
+f() {
+  A a = .nam^ed();
+}
+
+class A {
+  A.[!named!]();
+}
+''';
+
+    await testContents(contents);
+  }
+
+  Future<void> test_dotShorthand_constructor_unnamed() async {
+    var contents = '''
+f() {
+  A a = .ne^w();
+}
+
+class A {
+  [!A!]();
+}
+''';
+
+    await testContents(contents);
+  }
+
+  Future<void> test_dotShorthand_enum() async {
+    var contents = '''
+enum A {
+  [!one!],
+}
+
+f() {
+  A a = .on^e;
+}
+''';
+
+    await testContents(contents);
+  }
+
+  Future<void> test_dotShorthand_extensionType() async {
+    var contents = '''
+f() {
+  A a = .fie^ld;
+}
+
+extension type A(int x) {
+  static A get [!field!] => A(1);
+}
+''';
+
+    await testContents(contents);
+  }
+
+  Future<void> test_dotShorthand_field() async {
+    var contents = '''
+f() {
+  A a = .fie^ld;
+}
+
+class A {
+  static A [!field!] = A();
+}
+''';
+
+    await testContents(contents);
+  }
+
+  Future<void> test_dotShorthand_method() async {
+    var contents = '''
+f() {
+  A a = .meth^od();
+}
+
+class A {
+  static A [!method!]() => A();
+}
+''';
+
+    await testContents(contents);
+  }
+
   Future<void> test_field_underscore() async {
     var contents = '''
 class A {