Add the add_trailing_slash function and tests.

diff --git a/src/LWN/URI.hs b/src/LWN/URI.hs
index 7aa4240cf146eee312801881100ce43be087b6e5..3a21413dbf3feab89967ada01da9e13c9bb61531 100644 (file)
--- a/src/LWN/URI.hs
+++ b/src/LWN/URI.hs
@@ -1,6 +1,7 @@
 module LWN.URI
 where
 
+import Data.List (isSuffixOf)
 import Data.Maybe (fromJust)
 import Data.String.Utils (split)
 import Network.URI (
@@ -53,6 +54,21 @@ make_https url =
     parse_result = parseURIReference url
 
 
+
+add_trailing_slash :: URL -> URL
+add_trailing_slash url =
+  case parse_result of
+    Nothing -> url -- Shrug?
+    Just uri ->
+      let old_path = uriPath uri in
+        if isSuffixOf "/" old_path then
+          url -- It already had a trailing slash
+        else
+          show $ uri { uriPath = old_path ++ "/" }
+  where
+    parse_result = parseURIReference url
+
+
 -- | Does this URI use an HTTPS-compatible port?
 https_port :: URI -> Bool
 https_port uri =
@@ -234,6 +250,25 @@ test_normal_url_conversion =
     actual = fromJust $ make_absolute_url url
 
 
+
+test_make_https :: Assertion
+test_make_https =
+  assertEqual "HTTP URL is made HTTPS" expected actual
+  where
+    url = "http://lwn.net/current"
+    expected = "https://lwn.net/current"
+    actual = make_https url
+
+
+test_add_trailing_slash :: Assertion
+test_add_trailing_slash =
+  assertEqual "Trailing slashes get added" expected actual
+  where
+    url = "https://lwn.net/current"
+    expected = "https://lwn.net/current/"
+    actual = add_trailing_slash url
+
+
 uri_tests :: Test
 uri_tests =
   testGroup "URI Tests" [
@@ -250,4 +285,9 @@ uri_tests =
 
     testGroup "Relative -> Absolute Conversion" [
       testCase "Empty URL converted to lwn.net" test_empty_url_conversion,
-      testCase "Normal URL made absolute" test_normal_url_conversion ]]
+      testCase "Normal URL made absolute" test_normal_url_conversion ],
+
+    testGroup "URL Mangling" [
+      testCase "HTTP URLs are made HTTPS" test_make_https,
+      testCase "Trailing slashes get added" test_add_trailing_slash ]
+    ]