)

// Create a 3-way merge patch based-on JSON merge patch.
// Calculate addition-and-change patch between current and modified.
// Calculate deletion patch between original and modified.
func CreateThreeWayJSONMergePatch(original, modified, current []byte, fns ...mergepatch.PreconditionFunc) ([]byte, error) {
	if len(original) == 0 {
		original = []byte(`{}`)
	}
	if len(modified) == 0 {
		modified = []byte(`{}`)
	}

		testThreeWayPatch(t, c)
	}
}

func testThreeWayPatch(t *testing.T, c JSONMergePatchTestCase) {
	original, modified, current, expected, result := threeWayTestCaseToJSONOrFail(t, c)
	actual, err := CreateThreeWayJSONMergePatch(original, modified, current)
	if err != nil {
		t.Fatalf("error: %s", err)
	}
	testPatchCreation(t, expected, actual, c.Description)
	testPatchApplication(t, current, actual, result, c.Description)
}