Fix test code lens when umbrella app names have the same prefix. (#759)

apps/language_server/lib/language_server/server.ex

@@ -869,7 +869,7 @@ defmodule ElixirLS.LanguageServer.Server do
     file_path = SourceFile.Path.from_uri(uri)
 
     Mix.Project.apps_paths()
-    |> Enum.find(fn {_app, app_path} -> String.contains?(file_path, app_path) end)
+    |> Enum.find(fn {_app, app_path} -> under_app?(file_path, project_dir, app_path) end)
     |> case do
       nil ->
         {:ok, []}
@@ -929,6 +929,13 @@ defmodule ElixirLS.LanguageServer.Server do
     |> Enum.any?(&(&1 == file_path))
   end
 
+  defp under_app?(file_path, project_dir, app_path) do
+    file_path_list = file_path |> Path.relative_to(project_dir) |> Path.split()
+    app_path_list = app_path |> Path.split()
+
+    List.starts_with?(file_path_list, app_path_list)
+  end
+
   # Build
 
   defp trigger_build(state = %__MODULE__{project_dir: project_dir}) do

apps/language_server/test/fixtures/umbrella_test_code_lens/apps/app/mix.exs

@@ -0,0 +1,14 @@
+defmodule App.Mixfile do
+  use Mix.Project
+
+  def project do
+    [
+      app: :app,
+      version: "0.1.0"
+    ]
+  end
+
+  def application do
+    []
+  end
+end

apps/language_server/test/fixtures/umbrella_test_code_lens/apps/app/test/fixture_custom_test.exs

@@ -0,0 +1,7 @@
+defmodule App.UmbrellaTestCodeLensTest do
+  use ExUnit.Case
+
+  test "fixture test" do
+    assert true
+  end
+end

apps/language_server/test/fixtures/umbrella_test_code_lens/apps/app1/mix.exs

@@ -0,0 +1,14 @@
+defmodule App1.Mixfile do
+  use Mix.Project
+
+  def project do
+    [
+      app: :app1,
+      version: "0.1.0"
+    ]
+  end
+
+  def application do
+    []
+  end
+end

apps/language_server/test/fixtures/umbrella_test_code_lens/apps/app1/test/fixture_custom_test.exs

@@ -0,0 +1,7 @@
+defmodule App1.UmbrellaTestCodeLensTest do
+  use ExUnit.Case
+
+  test "fixture test" do
+    assert true
+  end
+end

apps/language_server/test/fixtures/umbrella_test_code_lens/mix.exs

@@ -0,0 +1,7 @@
+defmodule UmbrellaTestCodeLens.Mixfile do
+  use Mix.Project
+
+  def project do
+    [apps_path: "apps"]
+  end
+end

apps/language_server/test/server_test.exs

@@ -1287,6 +1287,75 @@ defmodule ElixirLS.LanguageServer.ServerTest do
     end)
   end
 
+  @tag :fixture
+  test "returns code lenses for runnable tests in umbrella apps",
+       %{
+         server: server
+       } do
+    in_fixture(__DIR__, "umbrella_test_code_lens", fn ->
+      file_path = "apps/app1/test/fixture_custom_test.exs"
+      file_uri = SourceFile.Path.to_uri(file_path)
+      file_absolute_path = SourceFile.Path.from_uri(file_uri)
+      text = File.read!(file_path)
+      project_dir = SourceFile.Path.from_uri("#{root_uri()}/apps/app1")
+
+      initialize(server)
+
+      Server.receive_packet(
+        server,
+        did_change_configuration(%{"elixirLS" => %{"enableTestLenses" => true}})
+      )
+
+      Server.receive_packet(server, did_open(file_uri, "elixir", 1, text))
+
+      wait_until_compiled(server)
+
+      Server.receive_packet(
+        server,
+        code_lens_req(4, file_uri)
+      )
+
+      resp = assert_receive(%{"id" => 4}, 5000)
+
+      assert response(4, [
+               %{
+                 "command" => %{
+                   "arguments" => [
+                     %{
+                       "filePath" => ^file_absolute_path,
+                       "testName" => "fixture test",
+                       "projectDir" => ^project_dir
+                     }
+                   ],
+                   "command" => "elixir.lens.test.run",
+                   "title" => "Run test"
+                 },
+                 "range" => %{
+                   "end" => %{"character" => 0, "line" => 3},
+                   "start" => %{"character" => 0, "line" => 3}
+                 }
+               },
+               %{
+                 "command" => %{
+                   "arguments" => [
+                     %{
+                       "filePath" => ^file_absolute_path,
+                       "module" => "Elixir.App1.UmbrellaTestCodeLensTest",
+                       "projectDir" => ^project_dir
+                     }
+                   ],
+                   "command" => "elixir.lens.test.run",
+                   "title" => "Run tests in module"
+                 },
+                 "range" => %{
+                   "end" => %{"character" => 0, "line" => 0},
+                   "start" => %{"character" => 0, "line" => 0}
+                 }
+               }
+             ]) = resp
+    end)
+  end
+
   @tag :fixture
   test "does not return code lenses for runnable tests when test lenses settings is not set", %{
     server: server