fix: add simple rendering logic for currency values and errors

tests/test_app.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8; -*-
 
 import datetime
+import decimal
 import os
 import shutil
 import sys
@@ -422,6 +423,31 @@ app_title = WuttaTest
         session = self.app.get_session(user)
         self.assertIs(session, mysession)
 
+    def test_render_currency(self):
+
+        # null
+        self.assertEqual(self.app.render_currency(None), '')
+
+        # basic decimal example
+        value = decimal.Decimal('42.00')
+        self.assertEqual(self.app.render_currency(value), '$42.00')
+
+        # basic float example
+        value = 42.00
+        self.assertEqual(self.app.render_currency(value), '$42.00')
+
+        # decimal places will be rounded
+        value = decimal.Decimal('42.12345')
+        self.assertEqual(self.app.render_currency(value), '$42.12')
+
+        # but we can declare the scale
+        value = decimal.Decimal('42.12345')
+        self.assertEqual(self.app.render_currency(value, scale=4), '$42.1234')
+
+        # negative numbers get parens
+        value = decimal.Decimal('-42.42')
+        self.assertEqual(self.app.render_currency(value), '($42.42)')
+
     def test_render_date(self):
         self.assertIsNone(self.app.render_date(None))
 
@@ -434,6 +460,22 @@ app_title = WuttaTest
         dt = datetime.datetime(2024, 12, 11, 8, 30, tzinfo=datetime.timezone.utc)
         self.assertEqual(self.app.render_datetime(dt), '2024-12-11 08:30+0000')
 
+    def test_simple_error(self):
+
+        # with description
+        try:
+            raise RuntimeError("just testin")
+        except Exception as error:
+            result = self.app.render_error(error)
+        self.assertEqual(result, "RuntimeError: just testin")
+
+        # without description
+        try:
+            raise RuntimeError
+        except Exception as error:
+            result = self.app.render_error(error)
+        self.assertEqual(result, "RuntimeError")
+
     def test_render_time_ago(self):
         with patch.object(mod, 'humanize') as humanize:
             humanize.naturaltime.return_value = 'now'

tests/test_util.py

@@ -317,3 +317,20 @@ class TestResourcePath(TestCase):
 
             # absolute path returned as-is
             self.assertEqual(mod.resource_path('/tmp/doesnotexist.txt'), '/tmp/doesnotexist.txt')
+
+
+class TestSimpleError(TestCase):
+
+    def test_with_description(self):
+        try:
+            raise RuntimeError("just testin")
+        except Exception as error:
+            result = mod.simple_error(error)
+        self.assertEqual(result, "RuntimeError: just testin")
+
+    def test_without_description(self):
+        try:
+            raise RuntimeError
+        except Exception as error:
+            result = mod.simple_error(error)
+        self.assertEqual(result, "RuntimeError")