From 9548eb6deb9ff3929fc0a89ca4136f7d39f3e3aa Mon Sep 17 00:00:00 2001
From: Connor Skees <connor1skees@gmail.com>
Date: Mon, 17 Aug 2020 04:48:11 -0400
Subject: [PATCH] convert single quotes to double quotes in `calc`

---
 src/parse/value/css_function.rs | 4 ++--
 tests/special-functions.rs      | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/parse/value/css_function.rs b/src/parse/value/css_function.rs
index fe90a18..5d60c3b 100644
--- a/src/parse/value/css_function.rs
+++ b/src/parse/value/css_function.rs
@@ -48,12 +48,12 @@ impl<'a> Parser<'a> {
                     }
                 }
                 q @ '\'' | q @ '"' => {
-                    buf.push(q);
+                    buf.push('"');
                     match self.parse_quoted_string(q)?.node {
                         Value::String(ref s, ..) => buf.push_str(s),
                         _ => unreachable!(),
                     }
-                    buf.push(q);
+                    buf.push('"');
                 }
                 c => buf.push(c),
             }
diff --git a/tests/special-functions.rs b/tests/special-functions.rs
index 9511465..5f22f5f 100644
--- a/tests/special-functions.rs
+++ b/tests/special-functions.rs
@@ -59,6 +59,11 @@ test!(
     "a {\n  color: calc(\")\");\n}\n",
     "a {\n  color: calc(\")\");\n}\n"
 );
+test!(
+    calc_quoted_string_single_quotes,
+    "a {\n  color: calc('a');\n}\n",
+    "a {\n  color: calc(\"a\");\n}\n"
+);
 test!(
     element_whitespace,
     "a {\n  color: element(       1      );\n}\n",