tests: Add nodejs child_process spawner

lib/http-bridge/test/integration/js/mock-daedalus.js

@@ -0,0 +1,57 @@
+#!/usr/bin/env node
+
+// This runs cardano-wallet-launcher in the same way that Daedalus would.
+// It needs node, cardano-wallet, and cardano-wallet-launcher on the PATH to run.
+
+const child_process = require("child_process");
+const http = require('http');
+
+function main() {
+  // const proc = child_process.spawn("cardano-wallet", ["server"], {
+  const proc = child_process.spawn("cardano-wallet-launcher", [], {
+    stdio: ["ignore", "inherit", "inherit", "ipc"]
+  });
+
+  proc.on("close", function(code, signal) {
+    console.log("JS: child_process stdio streams closed");
+    process.exit(1);
+ });
+
+  proc.on("disconnect", function() {
+    console.log("JS: child_process disconnected");
+    process.exit(2);
+  });
+
+  proc.on("error", function(err) {
+    console.log("JS: error child_process: " + err);
+    process.exit(3);
+  });
+
+  proc.on("exit", function(code, signal) {
+    console.log("JS: child_process exited with status " + code + " or signal " + signal);
+    process.exit(4);
+  });
+
+  proc.on("message", function(msg) {
+    console.log("JS: message received", msg);
+    if (msg.Started) {
+      proc.send("QueryPort");
+    } else if (msg.ReplyPort) {
+      http.get({
+        hostname: "localhost",
+        port: msg.ReplyPort,
+        path: "/v2/wallets",
+        agent: false
+      }, (res) => {
+        console.log("JS: response from wallet: " + res.statusCode);
+        res.resume();
+        res.on("end", () => {
+          console.log("JS: request response from wallet finished, exiting.");
+          process.exit(0);
+        });
+      });
+    }
+  });
+}
+
+main();