allow arbitrary amount of parameters passed to the console methods

This gets us closer to following the spec at https://console.spec.whatwg.org/#logger

Author: Jake Champion

c-dependencies/js-compute-runtime/builtins/console.cpp

@@ -4,12 +4,22 @@ namespace Console {
 template <const char *prefix, uint8_t prefix_len>
 static bool console_out(JSContext *cx, unsigned argc, JS::Value *vp) {
   JS::CallArgs args = CallArgsFromVp(argc, vp);
-  size_t msg_len;
-  JS::UniqueChars msg = encode(cx, args.get(0), &msg_len);
-  if (!msg)
-    return false;
+  std::string message = "";
+  auto length = args.length();
+  for (int i = 0; i < length; i++) {
+    size_t msg_len;
+    JS::UniqueChars msg = encode(cx, args.get(i), &msg_len);
+    if (!msg)
+      return false;
+    if (message.length()) {
+      message += " ";
+      message += msg.get();
+    } else {
+      message += msg.get();
+    }
+  }
 
-  printf("%s: %s\n", prefix, msg.get());
+  printf("%s: %s\n", prefix, message.c_str());
   fflush(stdout);
 
   args.rval().setUndefined();

integration-tests/js-compute/fixtures/console/bin/index.js

@@ -0,0 +1 @@
+addEventListener("fetch", () => console.log("Happy", "birthday", "Aki", "and", "Yuki!"));

integration-tests/js-compute/fixtures/console/fastly.toml.in

@@ -0,0 +1,12 @@
+# This file describes a Fastly Compute@Edge package. To learn more visit:
+# https://developer.fastly.com/reference/fastly-toml/
+
+authors = ["[email protected]"]
+description = ""
+language = "other"
+manifest_version = 2
+name = "console"
+service_id = ""
+
+[scripts]
+  build = "../../../../target/release/js-compute-runtime"

integration-tests/js-compute/fixtures/console/tests.json

@@ -0,0 +1,15 @@
+{
+  "GET /": {
+    "environments": ["viceroy"],
+    "downstream_request": {
+      "method": "GET",
+      "pathname": "/"
+    },
+    "downstream_response": {
+      "status": 200
+    },
+    "logs": [
+      "stdout :: Log: Happy birthday Aki and Yuki!"
+    ]
+  }
+}