templatetags: add strip filters (#41701)

combo/public/templatetags/combo.py

@@ -286,6 +286,15 @@ def get(obj, key):
 def split(string, separator=' '):
     return (string or '').split(separator)
 
+@register.filter
+def strip(string, chars=None):
+    if not string:
+        return ''
+    if chars:
+        return force_text(string).strip(force_text(chars))
+    else:
+        return force_text(string).strip()
+
 @register.filter(name='get_group')
 def get_group(group_list, group_name):
     ret = []

tests/test_public_templatetags.py

@@ -129,6 +129,17 @@ def test_split():
     t = Template('{% for x in plop|split:"|" %}{{x}} {% endfor %}')
     assert t.render(Context({'plop': 'ab|cd|ef'})) == 'ab cd ef '
 
+def test_strip_templatetag():
+    tmpl = Template('{{ foo|strip }}')
+    assert tmpl.render(Context()) == ''
+    assert tmpl.render(Context({'foo': None})) == ''
+    assert tmpl.render(Context({'foo': ' foo bar '})) == 'foo bar'
+    assert tmpl.render(Context({'foo': ' foo bar\t'})) == 'foo bar'
+    assert tmpl.render(Context({'foo': ' félé  '})) == 'félé'
+    tmpl = Template('{{ foo|strip:"XY" }}')
+    assert tmpl.render(Context({'foo': 'XXfoo barXYX'})) == 'foo bar'
+    assert tmpl.render(Context({'foo': ' foo barXX'})) == ' foo bar'
+
 def test_get_group():
     context = Context({'cities': [
         {'name': 'Mumbai', 'population': '19,000,000', 'country': 'India'},