Run test262 tests in CI

Run test262 tests for Linux, macOS and Cosmopolitan

Add a Makefile `test2-bootstrap` helper to clone and patch test262 tests at
a particular commit. Running with the latest commit noticed a few tests were
failing and added them to the errors list.

The CI environment, especially for macOS, was a bit more unpredictable and was
failing in atomics tests due to lower timeouts in the `atomicsHelper` so double
the timeouts. The time didn't worsen too much. It still takes about 2-3 min.

.github/workflows/ci.yml

@@ -36,6 +36,10 @@ jobs:
       - name: Run microbench
         run: |
           make microbench
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make test2
 
   linux-lto:
     name: Linux LTO
@@ -138,6 +142,10 @@ jobs:
       - name: Run built-in tests
         run: |
           make test
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make test2
 
   macos-asan:
     runs-on: macos-latest
@@ -172,7 +180,12 @@ jobs:
       - name: Build + test
         uses: vmactions/freebsd-vm@v1
         with:
+          # This VM has a tendency to get stuck in the "VM is booting" cycle
+          # for quite a while, so set a shorter timeout
+          timeout-minutes: 15
           usesh: true
+          copyback: false
+          mem: 16384
           prepare: |
             pkg install -y gmake
           run: |
@@ -202,6 +215,10 @@ jobs:
       - name: Run built-in tests
         run: |
           make CONFIG_COSMO=y test
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make CONFIG_COSMO=y test2
 
   mingw-windows:
     name: MinGW Windows target

Changelog

@@ -1,3 +1,5 @@
+2025-09-13:
+
 - added JSON modules and import attributes
 - added JS_PrintValue() API
 - qjs: pretty print objects in print() and console.log()
@@ -12,6 +14,7 @@
   accept JSON5 modules
 - added JS_FreePropertyEnum() and JS_AtomToCStringLen() API
 - added Error.isError()
+- misc bug fixes
 
 2025-04-26:
 

Makefile

@@ -54,6 +54,10 @@ PREFIX?=/usr/local
 # use UB sanitizer
 #CONFIG_UBSAN=y
 
+# TEST262 bootstrap config: commit id and shallow "since" parameter
+TEST262_COMMIT?=af3d908437b0912513a594e7167f17658e72d88b
+TEST262_SINCE?=2025-09-14
+
 OBJDIR=.obj
 
 ifdef CONFIG_ASAN
@@ -464,6 +468,15 @@ stats: qjs$(EXE)
 microbench: qjs$(EXE)
 	$(WINE) ./qjs$(EXE) --std tests/microbench.js
 
+ifeq ($(wildcard test262/features.txt),)
+test2-bootstrap:
+	git clone --single-branch --shallow-since=$(TEST262_SINCE) https://github.com/tc39/test262.git
+	(cd test262 && git checkout -q $(TEST262_COMMIT) && patch -p1 < ../tests/test262.patch && cd ..)
+else
+test2-bootstrap:
+	(cd test262 && git fetch && git reset --hard $(TEST262_COMMIT) && patch -p1 < ../tests/test262.patch && cd ..)
+endif
+
 ifeq ($(wildcard test262o/tests.txt),)
 test2o test2o-update:
 	@echo test262o tests not installed

VERSION

@@ -1 +1 @@
-2025-04-26
+2025-09-13

quickjs.c

@@ -13002,73 +13002,6 @@ static JSValue JS_ToStringCheckObject(JSContext *ctx, JSValueConst val)
     return JS_ToString(ctx, val);
 }
 
-static JSValue JS_ToQuotedString(JSContext *ctx, JSValueConst val1)
-{
-    JSValue val;
-    JSString *p;
-    int i;
-    uint32_t c;
-    StringBuffer b_s, *b = &b_s;
-    char buf[16];
-
-    val = JS_ToStringCheckObject(ctx, val1);
-    if (JS_IsException(val))
-        return val;
-    p = JS_VALUE_GET_STRING(val);
-
-    if (string_buffer_init(ctx, b, p->len + 2))
-        goto fail;
-
-    if (string_buffer_putc8(b, '\"'))
-        goto fail;
-    for(i = 0; i < p->len; ) {
-        c = string_getc(p, &i);
-        switch(c) {
-        case '\t':
-            c = 't';
-            goto quote;
-        case '\r':
-            c = 'r';
-            goto quote;
-        case '\n':
-            c = 'n';
-            goto quote;
-        case '\b':
-            c = 'b';
-            goto quote;
-        case '\f':
-            c = 'f';
-            goto quote;
-        case '\"':
-        case '\\':
-        quote:
-            if (string_buffer_putc8(b, '\\'))
-                goto fail;
-            if (string_buffer_putc8(b, c))
-                goto fail;
-            break;
-        default:
-            if (c < 32 || is_surrogate(c)) {
-                snprintf(buf, sizeof(buf), "\\u%04x", c);
-                if (string_buffer_puts8(b, buf))
-                    goto fail;
-            } else {
-                if (string_buffer_putc(b, c))
-                    goto fail;
-            }
-            break;
-        }
-    }
-    if (string_buffer_putc8(b, '\"'))
-        goto fail;
-    JS_FreeValue(ctx, val);
-    return string_buffer_end(b);
- fail:
-    JS_FreeValue(ctx, val);
-    string_buffer_free(b);
-    return JS_EXCEPTION;
-}
-
 #define JS_PRINT_MAX_DEPTH 8
 
 typedef struct {
@@ -13126,18 +13059,61 @@ static uint32_t js_string_get_length(JSValueConst val)
     }
 }
 
-static void js_dump_char(JSPrintValueState *s, int c, int sep)
+/* pretty print the first 'len' characters of 'p' */
+static void js_print_string1(JSPrintValueState *s, JSString *p, int len, int sep)
 {
-    if (c == sep || c == '\\') {
+    uint8_t buf[UTF8_CHAR_LEN_MAX];
+    int l, i, c, c1;
+
+    for(i = 0; i < len; i++) {
+        c = string_get(p, i);
+        switch(c) {
+        case '\t':
+            c = 't';
+            goto quote;
+        case '\r':
+            c = 'r';
+            goto quote;
+        case '\n':
+            c = 'n';
+            goto quote;
+        case '\b':
+            c = 'b';
+            goto quote;
+        case '\f':
+            c = 'f';
+            goto quote;
+        case '\\':
+        quote:
             js_putc(s, '\\');
             js_putc(s, c);
-    } else if (c >= ' ' && c <= 126) {
+            break;
+        default:
+            if (c == sep)
+                goto quote;
+            if (c >= 32 && c <= 126) {
                 js_putc(s, c);
-    } else if (c == '\n') {
+            } else if (c < 32 || 
-        js_putc(s, '\\');
+                       (c >= 0x7f && c <= 0x9f)) {
-        js_putc(s, 'n');
+            escape:
-    } else {
                 js_printf(s, "\\u%04x", c);
+            } else {
+                if (is_hi_surrogate(c)) {
+                    if ((i + 1) >= len)
+                        goto escape;
+                    c1 = string_get(p, i + 1);
+                    if (!is_lo_surrogate(c1))
+                        goto escape;
+                    i++;
+                    c = from_surrogate(c, c1);
+                } else if (is_lo_surrogate(c)) {
+                    goto escape;
+                }
+                l = unicode_to_utf8(buf, c);
+                s->write_func(s->write_opaque, (char *)buf, l);
+            }
+            break;
+        }
     }
 }
 
@@ -13146,12 +13122,10 @@ static void js_print_string_rec(JSPrintValueState *s, JSValueConst val,
 {
     if (JS_VALUE_GET_TAG(val) == JS_TAG_STRING) {
         JSString *p = JS_VALUE_GET_STRING(val);
-        uint32_t i, len;
+        uint32_t len;
         if (pos < s->options.max_string_length) {
             len = min_uint32(p->len, s->options.max_string_length - pos);
-            for(i = 0; i < len; i++) {
+            js_print_string1(s, p, len, sep);
-                js_dump_char(s, string_get(p, i), sep);
-            }
         }
     } else if (JS_VALUE_GET_TAG(val) == JS_TAG_STRING_ROPE) {
         JSStringRope *r = JS_VALUE_GET_PTR(val);
@@ -13224,9 +13198,7 @@ static void js_print_atom(JSPrintValueState *s, JSAtom atom)
             }
         } else {
             js_putc(s, '"');
-            for(i = 0; i < p->len; i++) {
+            js_print_string1(s, p, p->len, '\"');
-                js_dump_char(s, string_get(p, i), '\"');
-            }
             js_putc(s, '"');
         }
     }
@@ -34952,6 +34924,7 @@ static void free_function_bytecode(JSRuntime *rt, JSFunctionBytecode *b)
                JS_AtomGetStrRT(rt, buf, sizeof(buf), b->func_name));
     }
 #endif
+    if (b->byte_code_buf)
         free_bytecode_atoms(rt, b->byte_code_buf, b->byte_code_len, TRUE);
 
     if (b->vardefs) {
@@ -43859,12 +43832,6 @@ static JSValue js_string_trim(JSContext *ctx, JSValueConst this_val,
     return ret;
 }
 
-static JSValue js_string___quote(JSContext *ctx, JSValueConst this_val,
-                                 int argc, JSValueConst *argv)
-{
-    return JS_ToQuotedString(ctx, this_val);
-}
-
 /* return 0 if before the first char */
 static int string_prevc(JSString *p, int *pidx)
 {
@@ -44352,7 +44319,6 @@ static const JSCFunctionListEntry js_string_proto_funcs[] = {
     JS_ALIAS_DEF("trimLeft", "trimStart" ),
     JS_CFUNC_DEF("toString", 0, js_string_toString ),
     JS_CFUNC_DEF("valueOf", 0, js_string_toString ),
-    JS_CFUNC_DEF("__quote", 1, js_string___quote ),
     JS_CFUNC_MAGIC_DEF("toLowerCase", 0, js_string_toLowerCase, 1 ),
     JS_CFUNC_MAGIC_DEF("toUpperCase", 0, js_string_toLowerCase, 0 ),
     JS_CFUNC_MAGIC_DEF("toLocaleLowerCase", 0, js_string_toLowerCase, 1 ),
@@ -46667,10 +46633,72 @@ typedef struct JSONStringifyContext {
     StringBuffer *b;
 } JSONStringifyContext;
 
-static JSValue JS_ToQuotedStringFree(JSContext *ctx, JSValue val) {
+static int JS_ToQuotedString(JSContext *ctx, StringBuffer *b, JSValueConst val1)
-    JSValue r = JS_ToQuotedString(ctx, val);
+{
+    JSValue val;
+    JSString *p;
+    int i;
+    uint32_t c;
+    char buf[16];
+
+    val = JS_ToStringCheckObject(ctx, val1);
+    if (JS_IsException(val))
+        return -1;
+    p = JS_VALUE_GET_STRING(val);
+
+    if (string_buffer_putc8(b, '\"'))
+        goto fail;
+    for(i = 0; i < p->len; ) {
+        c = string_getc(p, &i);
+        switch(c) {
+        case '\t':
+            c = 't';
+            goto quote;
+        case '\r':
+            c = 'r';
+            goto quote;
+        case '\n':
+            c = 'n';
+            goto quote;
+        case '\b':
+            c = 'b';
+            goto quote;
+        case '\f':
+            c = 'f';
+            goto quote;
+        case '\"':
+        case '\\':
+        quote:
+            if (string_buffer_putc8(b, '\\'))
+                goto fail;
+            if (string_buffer_putc8(b, c))
+                goto fail;
+            break;
+        default:
+            if (c < 32 || is_surrogate(c)) {
+                snprintf(buf, sizeof(buf), "\\u%04x", c);
+                if (string_buffer_puts8(b, buf))
+                    goto fail;
+            } else {
+                if (string_buffer_putc(b, c))
+                    goto fail;
+            }
+            break;
+        }
+    }
+    if (string_buffer_putc8(b, '\"'))
+        goto fail;
     JS_FreeValue(ctx, val);
-    return r;
+    return 0;
+ fail:
+    JS_FreeValue(ctx, val);
+    return -1;
+}
+
+static int JS_ToQuotedStringFree(JSContext *ctx, StringBuffer *b, JSValue val) {
+    int ret = JS_ToQuotedString(ctx, b, val);
+    JS_FreeValue(ctx, val);
+    return ret;
 }
 
 static JSValue js_json_check(JSContext *ctx, JSONStringifyContext *jsc,
@@ -46853,13 +46881,11 @@ static int js_json_to_str(JSContext *ctx, JSONStringifyContext *jsc,
                 if (!JS_IsUndefined(v)) {
                     if (has_content)
                         string_buffer_putc8(jsc->b, ',');
-                    prop = JS_ToQuotedStringFree(ctx, prop);
+                    string_buffer_concat_value(jsc->b, sep);
-                    if (JS_IsException(prop)) {
+                    if (JS_ToQuotedString(ctx, jsc->b, prop)) {
                         JS_FreeValue(ctx, v);
                         goto exception;
                     }
-                    string_buffer_concat_value(jsc->b, sep);
-                    string_buffer_concat_value(jsc->b, prop);
                     string_buffer_putc8(jsc->b, ':');
                     string_buffer_concat_value(jsc->b, sep1);
                     if (js_json_to_str(ctx, jsc, val, v, indent1))
@@ -46887,10 +46913,7 @@ static int js_json_to_str(JSContext *ctx, JSONStringifyContext *jsc,
     switch (JS_VALUE_GET_NORM_TAG(val)) {
     case JS_TAG_STRING:
     case JS_TAG_STRING_ROPE:
-        val = JS_ToQuotedStringFree(ctx, val);
+        return JS_ToQuotedStringFree(ctx, jsc->b, val);
-        if (JS_IsException(val))
-            goto exception;
-        goto concat_value;
     case JS_TAG_FLOAT64:
         if (!isfinite(JS_VALUE_GET_FLOAT64(val))) {
             val = JS_NULL;

test262.conf

@@ -116,6 +116,7 @@ for-of
 generators
 globalThis
 hashbang
+immutable-arraybuffer=skip
 import-attributes
 import-defer=skip
 import.meta

tests/test262.patch

@@ -14,9 +14,9 @@ index 9828b15..4a5919d 100644
 +//  small: 200,
 +//  long: 1000,
 +//  huge: 10000,
-+  yield: 20,
++  yield: 40,
-+  small: 20,
++  small: 40,
-+  long: 100,
++  long: 200,
 +  huge: 1000,
  };
  

tests/test_bjson.js

@@ -86,7 +86,7 @@ function toStr(a)
     case "undefined":
         return "undefined";
     case "string":
-        return a.__quote();
+        return JSON.stringify(a);
     case "number":
         if (a == 0 && 1 / a < 0)
             return "-0";