add test cases for mfa with args and dependent fields too

test/peri_test.exs

@@ -1589,6 +1589,56 @@ defmodule PeriTest do
         refute {:ok, ^data} = Peri.validate(parent, data)
       end
     end
+
+    test "it should apply the mapper on nested schemas too by MFA with additional args" do
+      nested = %{foo: :string}
+      parent = %{bar: {nested, {:transform, {__MODULE__, :id, []}}}}
+      data = %{bar: %{foo: "10"}}
+      assert {:ok, ^data} = Peri.validate(parent, data)
+
+      # generic map type should pass too
+      parent = %{bar: {:map, {:transform, {__MODULE__, :id, []}}}}
+      data = %{bar: %{foo: "hello"}}
+      assert {:ok, ^data} = Peri.validate(parent, data)
+
+      # function are indeed being applied?
+      assert_raise RuntimeError, fn ->
+        parent = %{bar: {nested, {:transform, {__MODULE__, :boom, []}}}}
+        data = %{bar: %{foo: "hello"}}
+        refute {:ok, ^data} = Peri.validate(parent, data)
+      end
+
+      assert_raise RuntimeError, fn ->
+        parent = %{bar: {:map, {:transform, {__MODULE__, :boom, []}}}}
+        data = %{bar: %{foo: "hello"}}
+        refute {:ok, ^data} = Peri.validate(parent, data)
+      end
+    end
+
+    test "it should apply the trasnformation on a nested schema type with dependent fields" do
+      nested = %{foo: :string}
+      parent = %{bar: {nested, {:transform, fn v, _ -> v end}}}
+      data = %{bar: %{foo: "hello"}}
+      assert {:ok, ^data} = Peri.validate(parent, data)
+
+      # generic map type should pass too
+      parent = %{bar: {:map, {:transform, fn v, _ -> v end}}}
+      data = %{bar: %{foo: "hello"}}
+      assert {:ok, ^data} = Peri.validate(parent, data)
+
+      # function are indeed being applied?
+      assert_raise RuntimeError, fn ->
+        parent = %{bar: {nested, {:transform, fn _, _ -> raise("boom") end}}}
+        data = %{bar: %{foo: "hello"}}
+        refute {:ok, ^data} = Peri.validate(parent, data)
+      end
+
+      assert_raise RuntimeError, fn ->
+        parent = %{bar: {:map, {:transform, fn _, _ -> raise("boom") end}}}
+        data = %{bar: %{foo: "hello"}}
+        refute {:ok, ^data} = Peri.validate(parent, data)
+      end
+    end
   end
 
   def id(v), do: v