Update tests

test/support/test_project.ex

@@ -0,0 +1,26 @@
+defmodule TestProject do
+  @moduledoc """
+  A module to fake projects in tests.
+  """
+
+  @doc """
+  Creates a new project.
+  """
+  def new do
+    nr = :erlang.unique_integer([:positive])
+
+    {{:module, module, _bin, _meta}, _binding} =
+      Code.eval_string("""
+      defmodule FormatWithDepsApp#{nr} do
+        def project do
+          [
+            app: :test_project_#{nr},
+            version: "0.1.0"
+          ]
+        end
+      end
+      """)
+
+    module
+  end
+end