Typo fix, tests, README.md updated.

README.md

@@ -24,6 +24,7 @@ All additional filters/tags will be registered automatically.
      - **[filesizeformat](https://docs.djangoproject.com/en/dev/ref/templates/builtins/#filesizeformat)** (human-readable filesize; takes bytes as input)
      - **[slugify](https://docs.djangoproject.com/en/dev/ref/templates/builtins/#slugify)** (creates a slug for a given input)
      - **truncatesentences** / **truncatesentences_html** (returns the first X sentences [like truncatechars/truncatewords]; please provide X as a parameter)
+     - **random** (returns a random element of the input slice)
 
   - Markup
      - **markdown**

filters.go

@@ -224,14 +224,14 @@ func filterRandom(in *pongo2.Value, param *pongo2.Value) (*pongo2.Value, *pongo2
 	if !in.CanSlice() {
 		return nil, &pongo2.Error{
 			Sender:    "filter:random",
-			OrigError: error.New("input is not sliceable"),
+			OrigError: errors.New("input is not sliceable"),
 		}
 	}
 
 	if in.Len() <= 0 {
 		return nil, &pongo2.Error{
 			Sender:    "filter:random",
-			OrigError: error.New("input slice is empty"),
+			OrigError: errors.New("input slice is empty"),
 		}
 	}
 

filters_test.go

@@ -89,4 +89,10 @@ func (s *TestSuite1) TestFilters(c *C) {
 	c.Assert(getResult("{{ text|truncatesentences_html:3 }}", pongo2.Context{
 		"text": `<div class="test"><ul><li>This is a first sentence with a 4.50 number.</li><li>The second one is even more fun! Isn't it?</li><li>Last sentence, okay.</li></ul></div>`}),
 		Equals, `<div class="test"><ul><li>This is a first sentence with a 4.50 number.</li><li>The second one is even more fun! Isn't it?</li></ul></div>`)
+
+	// Random
+	c.Assert(getResult("{{ array|random }}",
+		pongo2.Context{"array": []int{42}}),
+		Equals, "42")
+
 }