Very naive to_currency implementation for NL

num2words/lang_NL.py

@@ -21,6 +21,10 @@ from .lang_EU import Num2Word_EU
 
 
 class Num2Word_NL(Num2Word_EU):
+    CURRENCY_FORMS = {
+        'EUR': (('euro', 'euro'), ('cent', 'cents')),
+    }
+
     GIGA_SUFFIX = "iljard"
     MEGA_SUFFIX = "iljoen"
 
@@ -55,13 +59,14 @@ class Num2Word_NL(Num2Word_EU):
                 "sexagint", "septuagint", "oktogint", "nonagint"]
 
         self.high_numwords = (
-            ["zend"] + self.gen_high_numwords(units, tens, lows)
+                    ["zend"] + self.gen_high_numwords(units, tens, lows))
-            )
+
         self.mid_numwords = [(1000, "duizend"), (100, "honderd"),
                              (90, "negentig"), (80, "tachtig"),
                              (70, "zeventig"), (60, "zestig"),
                              (50, "vijftig"), (40, "veertig"),
                              (30, "dertig")]
+
         self.low_numwords = ["twintig", "negentien", "achttien", "zeventien",
                              "zestien", "vijftien", "veertien", "dertien",
                              "twaalf", "elf", "tien", "negen", "acht", "zeven",
@@ -129,12 +134,17 @@ class Num2Word_NL(Num2Word_EU):
         self.verify_ordinal(value)
         return str(value) + "."
 
-    def to_currency(self, val, longval=True, old=False):
+    def pluralize(self, n, forms):
-        if old:
+        """
-            return self.to_splitnum(val, hightxt="euro/s", lowtxt="cent/s",
+        :param n:
-                                    jointxt="en", longval=longval)
+        :param forms:
-        return super(Num2Word_NL, self).to_currency(val, jointxt="en",
+        :return:
-                                                    longval=longval)
+
+        gettext form is nplurals=2; plural=(n != 1);
+        but this claims https://onzetaal.nl/taaladvies/euro-euros/
+        not sure if it's applied only to euro
+        """
+        return forms[0]
 
     def to_year(self, val, longval=True):
         if not (val // 100) % 10:

tests/test_nl.py

@@ -64,3 +64,26 @@ class Num2WordsNLTest(TestCase):
 
     def test_ordinal_for_floating_numbers(self):
         self.assertRaises(TypeError, num2words, 2.453, ordinal=True, lang='nl')
+
+    def test_to_currency(self):
+        self.assertEqual(
+            num2words('38.4', lang='nl', to='currency', seperator=' en',
+                      cents=False, currency='EUR'),
+            "achtendertig euro en 40 cent"
+        )
+        self.assertEqual(
+            num2words('0', lang='nl', to='currency', seperator=' en',
+                      cents=False, currency='EUR'),
+            "nul euro en 00 cent"
+        )
+
+        self.assertEqual(
+            num2words('1.01', lang='nl', to='currency', seperator=' en',
+                      cents=True, currency='EUR'),
+            "één euro en één cent"
+        )
+
+        self.assertEqual(
+            num2words('4778.00', lang='nl', to='currency', seperator=' en',
+                      cents=True, currency='EUR'),
+            'vierduizendzevenhonderdachtenzeventig euro en nul cent')