regexp-examples_spec.rb in regexp-examples-0.3.2

- old
+ new

@@ -27,10 +27,18 @@
         expect{regexp.examples}.to raise_error RegexpExamples::UnsupportedSyntaxError
       end
     end
   end
 
+  def self.examples_are_empty(*regexps)
+    regexps.each do |regexp|
+      it do
+        expect(regexp.examples).to be_empty
+      end
+    end
+  end
+
   context 'returns matching strings' do
     context "for basic repeaters" do
       examples_exist_and_match(
         /a/,
         /a*/,
@@ -52,10 +60,11 @@
       )
     end
 
     context "for complex char groups (square brackets)" do
       examples_exist_and_match(
+
         /[abc]/,
         /[a-c]/,
         /[abc-e]/,
         /[^a-zA-Z]/,
         /[\w]/,
@@ -63,11 +72,12 @@
         /[\]]/,
         /[\\]/,
         /[\\\]]/,
         /[\n-\r]/,
         /[\-]/,
-        /[%-+]/ # This regex is "supposed to" match some surprising things!!!
+        /[%-+]/, # This regex is "supposed to" match some surprising things!!!
+        /['-.]/ # Test to ensure no "infinite loop" on character set expansion
       )
     end
 
     context "for complex multi groups" do
       examples_exist_and_match(
@@ -116,11 +126,12 @@
         /(I(N(C(E(P(T(I(O(N)))))))))*/,
         /[\w]{1}/,
         /((a?b*c+)) \1/,
         /((a?b*c+)?) \1/,
         /a|b|c|d/,
-        /a+|b*|c?/
+        /a+|b*|c?/,
+        /one|two|three/
       )
     end
 
     context "for illegal syntax" do
       examples_raise_illegal_syntax_error(
@@ -184,9 +195,24 @@
     context "for unicode sequences" do
       examples_exist_and_match(
       /\u6829/,
       /\uabcd/,
       /\u{42}word/
+      )
+    end
+
+    context "for empty character sets" do
+      examples_are_empty(
+        /[^\d\D]/,
+        /[^\w\W]/,
+        /[^\s\S]/,
+        /[^\h\H]/,
+        /[^\D0-9]/,
+        /[^\Wa-zA-Z0-9_]/,
+        /[^\d\D]*/,
+        /[^\d\D]+/,
+        /[^\d\D]{2}/,
+        /[^\d\D]word/
       )
     end
 
   end
 end