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+// Author:  cirakg & claude ai
+// Summary: Tests for the Aztec encoder: aztec_code_generator references, decoding dumps (mixed text, UTF-8), limits and stuffing.
+
+import Toybox.Lang;
+import Toybox.Test;
+
+// README 12.4 check 1 where comparable: single-class payloads give the same
+// bits as the reference's optimal sequence, so the symbols must match,
+// compact and full range (with reference grids), at all four EC levels.
+(:test)
+function aztecMatchesReference(logger as Test.Logger) as Boolean {
+    var rows = CodeVectors.AZTEC;
+    for (var i = 0; i < rows.size(); i++) {
+        var row = rows[i] as Array;
+        var payload = row[0] as String;
+        var result = Aztec.encode(payload, row[1] as Number);
+        if (result instanceof Codes.CodeError) {
+            logger.error("row " + i + ": " + result.message);
+            return false;
+        }
+        var expectedSize = row[2] as Number;
+        var expected = row[3] as String;
+        if (result.width != expectedSize || !MatrixFixtures.packedHex(result).equals(expected)) {
+            logger.error("row " + i + " '" + Text.clip(payload, 20) + "': size " + result.width + ", reference " + expectedSize);
+            return false;
+        }
+    }
+    logger.debug("CODES aztec reference rows=" + rows.size());
+    return true;
+}
+
+// README 12.4 check 2: mixed content (Binary Shift, mode latches), UTF-8
+// and long payloads, decoded by tools/check_codes.py.
+(:test)
+function aztecDumpForDecoding(logger as Test.Logger) as Boolean {
+    var payloads = ["Boarding pass FAKE 0042, seat 12A", "Zürich ✓ Ünïcödé", "https://example.com/m/fake?id=0042",
+        "abcDEF123 xyz", "!@#$%^&*()", "a", "MiXeD 12 cAsE 34 ."];
+    var long = "";
+    for (var i = 0; i < 40; i++) {
+        long += "Fake-Ticket/" + i + " ";
+    }
+    payloads.add(long);
+    for (var i = 0; i < payloads.size(); i++) {
+        var text = payloads[i] as String;
+        var result = Aztec.encode(text, i % 4);
+        if (result instanceof Codes.CodeError) {
+            logger.error("'" + text + "': " + result.message);
+            return false;
+        }
+        MatrixFixtures.dump(logger, Codes.AZTEC, text, result);
+    }
+    return true;
+}
+
+(:test)
+function aztecStuffingAndLimits(logger as Test.Logger) as Boolean {
+    // Six zero bits in 6-bit codewords: 00000 gets a stuffed 1, then the
+    // last 0 is padded with ones (and its all-ones last bit cleared).
+    var words = Aztec.stuff([0, 0, 0, 0, 0, 0]b, 6);
+    if (words.size() != 2 || words[0] != 1 || words[1] != 0x1F) {
+        logger.error("stuffing gave " + words.toString());
+        return false;
+    }
+    if (!(Aztec.encode("", 1) instanceof Codes.CodeError)) {
+        logger.error("empty text accepted");
+        return false;
+    }
+    var big = "";
+    for (var i = 0; i < 400; i++) {
+        big += "~~~~~~~~~~";
+    }
+    return Aztec.encode(big, 3) instanceof Codes.CodeError;
+}