fix: handle selector combinators surrounded by whitespace

Partial fix for #25

Author: flavorjones

lib/syntax_tree/css/selectors.rb

@@ -337,6 +337,8 @@ def relative_selector_list
 
       # <complex-selector> = <compound-selector> [ <combinator>? <compound-selector> ]*
       def complex_selector
+        consume_whitespace
+
         left = compound_selector
 
         if (c = maybe { combinator })
@@ -396,6 +398,8 @@ def simple_selector
 
       # <combinator> = '>' | '+' | '~' | [ '|' '|' ]
       def combinator
+        consume_whitespace
+
         value =
           options do
             maybe { consume(">") } ||

test/selectors_test.rb

@@ -97,6 +97,52 @@ class SelectorsTest < Minitest::Spec
         end
       end
 
+      it "parses a complex selector with whitespace" do
+        actual = parse_selectors("section > table")
+
+        assert_pattern do
+          actual => [
+            Selectors::ComplexSelector[
+              left: Selectors::TypeSelector[value: { name: { value: "section" } }],
+              combinator: { value: { value: ">" } },
+              right: Selectors::TypeSelector[value: { name: { value: "table" } }],
+            ]
+          ]
+        end
+      end
+
+      it "parses a complex selector with implicit descendant combinator" do
+        actual = parse_selectors("section table")
+
+        assert_pattern do
+          actual => [
+            Selectors::ComplexSelector[
+              left: Selectors::TypeSelector[value: { name: { value: "section" } }],
+              combinator: nil,
+              right: Selectors::TypeSelector[value: { name: { value: "table" } }],
+            ]
+          ]
+        end
+      end
+
+      it "parses a complex complex selector" do
+        actual = parse_selectors("section > table tr")
+
+        assert_pattern do
+          actual => [
+            Selectors::ComplexSelector[
+              left: Selectors::TypeSelector[value: { name: { value: "section" } }],
+              combinator: { value: { value: ">" } },
+              right: Selectors::ComplexSelector[
+                left: Selectors::TypeSelector[value: { name: { value: "table" } }],
+                combinator: nil,
+                right: Selectors::TypeSelector[value: { name: { value: "tr" } }]
+              ]
+            ]
+          ]
+        end
+      end
+
       private
 
       def parse_selectors(selectors)