Fix import and alias module functions not showing view on hexdocs link on hover (#712)

Author: oo6

apps/language_server/lib/language_server/providers/hover.ex

@@ -25,11 +25,11 @@ defmodule ElixirLS.LanguageServer.Providers.Hover do
         %{subject: ""} ->
           nil
 
-        %{subject: subject, docs: docs} ->
+        %{subject: subject, docs: docs, actual_subject: actual_subject} ->
           line_text = Enum.at(SourceFile.lines(text), line - 1)
           range = highlight_range(line_text, line - 1, character - 1, subject)
 
-          %{"contents" => contents(docs, subject, project_dir), "range" => range}
+          %{"contents" => contents(docs, actual_subject, project_dir), "range" => range}
       end
 
     {:ok, response}

apps/language_server/test/providers/hover_test.exs

@@ -101,6 +101,50 @@ defmodule ElixirLS.LanguageServer.Providers.HoverTest do
            )
   end
 
+  test "Import function hover" do
+    text = """
+    defmodule MyModule do
+      import Task.Supervisor
+
+      def hello() do
+        start_link()
+      end
+    end
+    """
+
+    {line, char} = {4, 5}
+
+    assert {:ok, %{"contents" => %{kind: "markdown", value: v}}} =
+             Hover.hover(text, line, char, fake_dir())
+
+    assert String.starts_with?(
+             v,
+             "> Task.Supervisor.start_link(options \\\\\\\\ [])  [view on hexdocs](https://hexdocs.pm/elixir/Task.Supervisor.html#start_link/1)"
+           )
+  end
+
+  test "Alias module function hover" do
+    text = """
+    defmodule MyModule do
+      alias Task.Supervisor
+
+      def hello() do
+        Supervisor.start_link()
+      end
+    end
+    """
+
+    {line, char} = {4, 15}
+
+    assert {:ok, %{"contents" => %{kind: "markdown", value: v}}} =
+             Hover.hover(text, line, char, fake_dir())
+
+    assert String.starts_with?(
+             v,
+             "> Task.Supervisor.start_link(options \\\\\\\\ [])  [view on hexdocs](https://hexdocs.pm/elixir/Task.Supervisor.html#start_link/1)"
+           )
+  end
+
   test "Erlang module hover is not support now" do
     text = """
     defmodule MyModule do