Allow the suffix to be manually set

Sometimes the automatically generated suffix might not match what
we want. For example SomeSchema.Nested by default generates as
create_nested rather than create_some_schema_nested. Also supports
other cases where the schema doesn't match the context names, although
using it that way is probably unwise.

lib/option_parser.ex

@@ -63,10 +63,10 @@ defmodule EctoResource.OptionParser do
 
   @spec create_suffix(module, list()) :: String.t()
   def create_suffix(schema, options) when is_list(options) do
-    if Keyword.get(options, :suffix) == false do
-      ""
-    else
-      Helpers.underscore_module_name(schema)
+    case Keyword.get(options, :suffix) do
+      false -> ""
+      manual when is_binary(manual) -> manual
+      _ -> Helpers.underscore_module_name(schema)
     end
   end
 

test/ecto_resource/option_parser_test.exs

@@ -292,5 +292,9 @@ defmodule EctoResource.OptionParserTest do
       assert OptionParser.create_suffix(TestSchema, suffix: false, except: [:create!, :create]) ==
                ""
     end
+
+    test "when suffix is set to a string, it returns that string directly" do
+      assert OptionParser.create_suffix(TestSchema, suffix: "some_thing") == "some_thing"
+    end
   end
 end