fix(javascript): honor child-process callback overloads

src/domain/javascript/javascriptSemanticAnalysis.child_process_callbacks.test.ts

@@ -0,0 +1,67 @@
+import { expect, it } from "vitest";
+import { analyzeJavaScriptSemantics } from "./javascriptSemanticAnalysis.js";
+
+const spawns = (source: string) =>
+  analyzeJavaScriptSemantics(source).childProcessSpawns;
+
+it.each(["spawn", "fork"])("rejects function-valued %s options", (method) => {
+  expect(
+    spawns(`
+    import { ${method} } from "node:child_process";
+    ${method}("worker.js", () => {});
+    ${method}("worker.js", [], function options() {});
+    ${method}("worker.js", [], class Options {});
+  `),
+  ).toEqual([]);
+});
+
+it("rejects a literal exec callback after explicit options", () => {
+  expect(
+    spawns(`
+    import { exec } from "node:child_process";
+    exec("node --version", {}, false);
+    exec("node --version", null, {});
+  `),
+  ).toEqual([]);
+});
+
+it("selects execFile callbacks with and without an argv array", () => {
+  expect(
+    spawns(`
+    import { execFile } from "node:child_process";
+    execFile("node", {}, { cwd: "." });
+    execFile("node", [], {}, false);
+    execFile("node", null, {}, "callback");
+  `),
+  ).toEqual([]);
+});
+
+it("keeps callback overloads and nullish callbacks", () => {
+  expect(
+    spawns(`
+    import { exec, execFile } from "node:child_process";
+    exec("node --version", () => {}, false);
+    exec("node --version", {}, null);
+    execFile("node", () => {}, { cwd: false });
+    execFile("node", [], () => {}, false);
+    execFile("node", {}, null);
+    execFile("node", [], {}, undefined);
+  `),
+  ).toHaveLength(6);
+});
+
+it("leaves uncertain callback slots and spread positions undecided", () => {
+  expect(
+    spawns(`
+    import { exec, execFile, spawn } from "node:child_process";
+    function run(options, callback, args) {
+      exec("node --version", options, false);
+      exec("node --version", {}, callback);
+      execFile("node", options, false);
+      execFile("node", [], options, false);
+      execFile("node", ...args, {}, false);
+      spawn("node", ...args, () => {});
+    }
+  `),
+  ).toHaveLength(6);
+});