Tests: Import WPT base64() test

This no longer crashes with the StringView fix in the previous commit.
Author: https://github.com/AtkinsSJ Commit: https://github.com/LadybirdBrowser/ladybird/commit/bd5424f435c Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8711 Reviewed-by: https://github.com/shannonbooth ✅
2026-04-28 10:37:17 +02:00 · 2026-03-31 16:03:41 +01:00 · 2026-03-31 17:02:12 +00:00
parent 7781f1d131
commit bd5424f435
5 changed files with 651 additions and 0 deletions
--- a/Tests/LibWeb/Text/input/wpt-import/html/webappapis/atob/base64.any.html
+++ b/Tests/LibWeb/Text/input/wpt-import/html/webappapis/atob/base64.any.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+
+<div id=log></div>
+<script src="../../../html/webappapis/atob/base64.any.js"></script>
--- a/Tests/LibWeb/Text/input/wpt-import/html/webappapis/atob/base64.any.js
+++ b/Tests/LibWeb/Text/input/wpt-import/html/webappapis/atob/base64.any.js
@@ -0,0 +1,165 @@
+// META: global=window,dedicatedworker,shadowrealm
+
+/**
+ * btoa() as defined by the HTML5 spec, which mostly just references RFC4648.
+ */
+function mybtoa(s) {
+    // String conversion as required by WebIDL.
+    s = String(s);
+
+    // "The btoa() method must throw an INVALID_CHARACTER_ERR exception if the
+    // method's first argument contains any character whose code point is
+    // greater than U+00FF."
+    for (var i = 0; i < s.length; i++) {
+        if (s.charCodeAt(i) > 255) {
+            return "INVALID_CHARACTER_ERR";
+        }
+    }
+
+    var out = "";
+    for (var i = 0; i < s.length; i += 3) {
+        var groupsOfSix = [undefined, undefined, undefined, undefined];
+        groupsOfSix[0] = s.charCodeAt(i) >> 2;
+        groupsOfSix[1] = (s.charCodeAt(i) & 0x03) << 4;
+        if (s.length > i + 1) {
+            groupsOfSix[1] |= s.charCodeAt(i + 1) >> 4;
+            groupsOfSix[2] = (s.charCodeAt(i + 1) & 0x0f) << 2;
+        }
+        if (s.length > i + 2) {
+            groupsOfSix[2] |= s.charCodeAt(i + 2) >> 6;
+            groupsOfSix[3] = s.charCodeAt(i + 2) & 0x3f;
+        }
+        for (var j = 0; j < groupsOfSix.length; j++) {
+            if (typeof groupsOfSix[j] == "undefined") {
+                out += "=";
+            } else {
+                out += btoaLookup(groupsOfSix[j]);
+            }
+        }
+    }
+    return out;
+}
+
+/**
+ * Lookup table for mybtoa(), which converts a six-bit number into the
+ * corresponding ASCII character.
+ */
+function btoaLookup(idx) {
+    if (idx < 26) {
+        return String.fromCharCode(idx + 'A'.charCodeAt(0));
+    }
+    if (idx < 52) {
+        return String.fromCharCode(idx - 26 + 'a'.charCodeAt(0));
+    }
+    if (idx < 62) {
+        return String.fromCharCode(idx - 52 + '0'.charCodeAt(0));
+    }
+    if (idx == 62) {
+        return '+';
+    }
+    if (idx == 63) {
+        return '/';
+    }
+    // Throw INVALID_CHARACTER_ERR exception here -- won't be hit in the tests.
+}
+
+function btoaException(input) {
+    input = String(input);
+    for (var i = 0; i < input.length; i++) {
+        if (input.charCodeAt(i) > 255) {
+            return true;
+        }
+    }
+    return false;
+}
+
+function testBtoa(input) {
+    // "The btoa() method must throw an INVALID_CHARACTER_ERR exception if the
+    // method's first argument contains any character whose code point is
+    // greater than U+00FF."
+    var normalizedInput = String(input);
+    for (var i = 0; i < normalizedInput.length; i++) {
+        if (normalizedInput.charCodeAt(i) > 255) {
+            assert_throws_dom("InvalidCharacterError", function() { btoa(input); },
+                "Code unit " + i + " has value " + normalizedInput.charCodeAt(i) + ", which is greater than 255");
+            return;
+        }
+    }
+    assert_equals(btoa(input), mybtoa(input));
+    assert_equals(atob(btoa(input)), String(input), "atob(btoa(input)) must be the same as String(input)");
+}
+
+var tests = ["עברית", "", "ab", "abc", "abcd", "abcde",
+    // This one is thrown in because IE9 seems to fail atob(btoa()) on it.  Or
+    // possibly to fail btoa().  I actually can't tell what's happening here,
+    // but it doesn't hurt.
+    "\xff\xff\xc0",
+    // Is your DOM implementation binary-safe?
+    "\0a", "a\0b",
+    // WebIDL tests.
+    undefined, null, 7, 12, 1.5, true, false, NaN, +Infinity, -Infinity, 0, -0,
+    {toString: function() { return "foo" }},
+];
+for (var i = 0; i < 258; i++) {
+    tests.push(String.fromCharCode(i));
+}
+tests.push(String.fromCharCode(10000));
+tests.push(String.fromCharCode(65534));
+tests.push(String.fromCharCode(65535));
+
+// This is supposed to be U+10000.
+tests.push(String.fromCharCode(0xd800, 0xdc00));
+tests = tests.map(
+    function(elem) {
+        var expected = mybtoa(elem);
+        if (expected === "INVALID_CHARACTER_ERR") {
+            return ["btoa("  + format_value(elem) + ") must raise INVALID_CHARACTER_ERR", elem];
+        }
+        return ["btoa(" + format_value(elem) + ") == " + format_value(mybtoa(elem)), elem];
+    }
+);
+
+var everything = "";
+for (var i = 0; i < 256; i++) {
+    everything += String.fromCharCode(i);
+}
+tests.push(["btoa(first 256 code points concatenated)", everything]);
+
+generate_tests(testBtoa, tests);
+
+promise_test(() => fetch_json("../../../fetch/data-urls/resources/base64.json").then(runAtobTests), "atob() setup.");
+
+const idlTests = [
+  [undefined, null],
+  [null, [158, 233, 101]],
+  [7, null],
+  [12, [215]],
+  [1.5, null],
+  [true, [182, 187]],
+  [false, null],
+  [NaN, [53, 163]],
+  [+Infinity, [34, 119, 226, 158, 43, 114]],
+  [-Infinity, null],
+  [0, null],
+  [-0, null],
+  [{toString: function() { return "foo" }}, [126, 138]],
+  [{toString: function() { return "abcd" }}, [105, 183, 29]]
+];
+
+function runAtobTests(tests) {
+  const allTests = tests.concat(idlTests);
+  for(let i = 0; i < allTests.length; i++) {
+    const input = allTests[i][0],
+          output = allTests[i][1];
+    test(() => {
+      if(output === null) {
+        assert_throws_dom("InvalidCharacterError", () => globalThis.atob(input));
+      } else {
+        const result = globalThis.atob(input);
+        for(let ii = 0; ii < output.length; ii++) {
+          assert_equals(result.charCodeAt(ii), output[ii]);
+        }
+      }
+    }, "atob(" + format_value(input) + ")");
+  }
+}