commit 3375e1c24fcbb2b53819bf87460f3eb4932b1c78
author Jonathan Hedley <jonathan@hedley.net> Sun Dec 17 13:42:51 2023 +1100
committer Jonathan Hedley <jonathan@hedley.net> Sun Dec 17 13:42:51 2023 +1100
tree a2701ba941daa84b9240a20449d5b1324cd1a456
parent 8a4bdaef7aeaaa62d4016b890cdca87b1a701b7f

Relax validator to support `[^]` any attribute prefix

This discovered functionality previously worked.

Relates to #2079

src/main/java/org/jsoup/select/Evaluator.java

diff --git a/src/main/java/org/jsoup/select/Evaluator.java b/src/main/java/org/jsoup/select/Evaluator.java
index 2448969..9e0b622 100644
--- a/src/main/java/org/jsoup/select/Evaluator.java
+++ b/src/main/java/org/jsoup/select/Evaluator.java
@@ -191,7 +191,7 @@
         private final String keyPrefix;
 
         public AttributeStarting(String keyPrefix) {
-            Validate.notEmpty(keyPrefix);
+            Validate.notNull(keyPrefix); // OK to be empty - will find elements with any attributes
             this.keyPrefix = lowerCase(keyPrefix);
         }
 

src/test/java/org/jsoup/select/SelectorTest.java

diff --git a/src/test/java/org/jsoup/select/SelectorTest.java b/src/test/java/org/jsoup/select/SelectorTest.java
index fd5740e..3ac0d62 100644
--- a/src/test/java/org/jsoup/select/SelectorTest.java
+++ b/src/test/java/org/jsoup/select/SelectorTest.java
@@ -1230,4 +1230,17 @@
         Elements els = doc.select(q);
         assertEquals(3, els.size());
     }
+
+    @Test public void emptyAttributePrefix() {
+        // https://github.com/jhy/jsoup/issues/2079
+        // Discovered feature: [^] should find elements with any attribute (any prefix)
+        String html = "<p one>One<p one two>Two<p>Three";
+        Document doc = Jsoup.parse(html);
+
+        Elements els = doc.select("[^]");
+        assertSelectedOwnText(els, "One", "Two");
+
+        Elements emptyAttr = doc.select("p:not([^])");
+        assertSelectedOwnText(emptyAttr, "Three");
+    }
 }