Resolve goto-def/refs/hover at the end of a symbol (#1038 / #1027)

Bump elixir_sense to 9f6b3fe, which makes `SurroundContext.Toxic.surround_context`
resolve the trailing edge of a symbol. All four navigation locators (definition,
references, implementation, hover) consume it, so the cursor placed at the visual
end of a name now resolves instead of returning nothing (#1038), and the end of
an alias before a `.` resolves to the module rather than the remote call (#1027).

Add end-to-end coverage in the definition locator test for both cases.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XRd15BX6wBpZ8ThaNSo232

Author: lukaszsamson

apps/language_server/test/providers/definition/locator_test.exs

@@ -18,6 +18,43 @@ defmodule ElixirLS.LanguageServer.Providers.Definition.LocatorTest do
     assert nil == Locator.definition("__MODULE__", 1, 1)
   end
 
+  # elixir-lsp/elixir-ls#1038: goto-definition must work when the cursor is at the very end of a
+  # symbol (one column past its last character), not only when it is on a character of the symbol.
+  test "find definition with the cursor at the end of the symbol (#1038)" do
+    buffer = """
+    defmodule MyModule do
+      def my_func(a), do: a
+
+      def caller do
+        my_func(1)
+      end
+    end
+    """
+
+    # `my_func` is on line 5 at columns 5..11; column 12 is the end of the symbol.
+    for col <- [8, 11, 12] do
+      assert %Location{type: :function, line: 2} = Locator.definition(buffer, 5, col),
+             "expected my_func/1 definition at line 5 column #{col}"
+    end
+  end
+
+  # elixir-lsp/elixir-ls#1027: at the end of an alias that is the LHS of a remote call, the cursor
+  # resolves to the module, not the function.
+  test "cursor at the end of an alias before `.` resolves the module (#1027)" do
+    buffer = """
+    defmodule MyModule do
+      alias ElixirSenseExample.ModuleWithFunctions
+
+      def caller do
+        ModuleWithFunctions.function_arity_zero()
+      end
+    end
+    """
+
+    # `ModuleWithFunctions` is on line 5 at columns 5..23; column 24 is on the `.` (its end).
+    assert %Location{type: :module} = Locator.definition(buffer, 5, 24)
+  end
+
   test "find module definition inside Phoenix's scope" do
     _define_existing_atom = ExampleWeb
 

dep_versions.exs

@@ -1,5 +1,5 @@
 [
-  elixir_sense: "89eda3fc4df9cea0d70c528f3e7e240a70c860f8",
+  elixir_sense: "9f6b3fe25e64e984c09f74786071356354ec16f7",
   dialyxir_vendored: "accfec9393079abc4a82b7e79a4997f59f085b67",
   jason_v: "f1c10fa9c445cb9f300266122ef18671054b2330",
   erl2ex_vendored: "04f93e55f46d35d0aa3c149616f2c7a6a1ad9311",

mix.lock

@@ -2,7 +2,7 @@
   "benchee": {:hex, :benchee, "1.1.0", "f3a43817209a92a1fade36ef36b86e1052627fd8934a8b937ac9ab3a76c43062", [:mix], [{:deep_merge, "~> 1.0", [hex: :deep_merge, repo: "hexpm", optional: false]}, {:statistex, "~> 1.0", [hex: :statistex, repo: "hexpm", optional: false]}], "hexpm", "7da57d545003165a012b587077f6ba90b89210fd88074ce3c60ce239eb5e6d93"},
   "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
   "dialyxir_vendored": {:git, "https://github.com/elixir-lsp/dialyxir.git", "accfec9393079abc4a82b7e79a4997f59f085b67", [ref: "accfec9393079abc4a82b7e79a4997f59f085b67"]},
-  "elixir_sense": {:git, "https://github.com/elixir-lsp/elixir_sense.git", "89eda3fc4df9cea0d70c528f3e7e240a70c860f8", [ref: "89eda3fc4df9cea0d70c528f3e7e240a70c860f8"]},
+  "elixir_sense": {:git, "https://github.com/elixir-lsp/elixir_sense.git", "9f6b3fe25e64e984c09f74786071356354ec16f7", [ref: "9f6b3fe25e64e984c09f74786071356354ec16f7"]},
   "erl2ex_vendored": {:git, "https://github.com/elixir-lsp/erl2ex.git", "04f93e55f46d35d0aa3c149616f2c7a6a1ad9311", [ref: "04f93e55f46d35d0aa3c149616f2c7a6a1ad9311"]},
   "erlex_vendored": {:git, "https://github.com/elixir-lsp/erlex.git", "50b8307f90451a5d0288fb239fb6405b5ca1f1a4", [ref: "50b8307f90451a5d0288fb239fb6405b5ca1f1a4"]},
   "jason_v": {:git, "https://github.com/elixir-lsp/jason.git", "f1c10fa9c445cb9f300266122ef18671054b2330", [ref: "f1c10fa9c445cb9f300266122ef18671054b2330"]},