1 files changed, 57 insertions, 0 deletions
diff --git a/testing/web-platform/tests/encoding/resources/encode-href-common.js b/testing/web-platform/tests/encoding/resources/encode-href-common.js
new file mode 100644
index 0000000000..dc646fe8c1
--- /dev/null
+++ b/testing/web-platform/tests/encoding/resources/encode-href-common.js
@@ -0,0 +1,57 @@
+// These are defined by the test:
+// errors (boolean)
+// encoder (function)
+// ranges (array)
+// expect (function)
+
+function encode(input, expected, desc) {
+    // tests whether a Unicode character is converted to an equivalent byte sequence by href
+    // input: a Unicode character
+    // expected: expected byte sequence
+    // desc: what's being tested
+    subsetTest(test, function() {
+        var a = document.createElement("a"); // <a> uses document encoding for URL's query
+        a.href = "https://example.com/?" + input;
+        result = a.search.substr(1); // remove leading "?"
+        assert_equals(normalizeStr(result), normalizeStr(expected));
+    }, desc);
+}
+
+// set up a simple array of unicode codepoints that are not encoded
+var codepoints = [];
+
+for (var range of ranges) {
+    for (var i = range[0]; i < range[1]; i++) {
+        result = encoder(String.fromCodePoint(i));
+        var success = !!result;
+        if (errors) {
+          success = !success;
+        }
+        if (success) {
+            var item = {};
+            codepoints.push(item);
+            item.cp = i;
+            item.expected = expect(result, i);
+            item.desc = range[2] ? range[2] + " " : "";
+        }
+    }
+}
+
+// run the tests
+for (var x = 0; x < codepoints.length; x++) {
+    encode(
+        String.fromCodePoint(codepoints[x].cp),
+        codepoints[x].expected,
+        codepoints[x].desc +
+            " U+" +
+            codepoints[x].cp.toString(16).toUpperCase() +
+            " " +
+            String.fromCodePoint(codepoints[x].cp) +
+            " " +
+            codepoints[x].expected
+    );
+}
+
+// NOTES
+// this test relies on support for String.fromCodePoint, which appears to be supported by major desktop browsers
+// the tests exclude ASCII characters