test: add source-built Hopper conformance fixtures

scripts/lib/conformance-fixtures.d.mts

@@ -0,0 +1,6 @@
+export const LARGE_FIXTURE_COUNT: number;
+export function sha256(value: string | Uint8Array): string;
+export function generateLargeFixture(count?: number): string;
+export function sourceDigest(
+  sources: readonly { readonly path: string; readonly content: string }[],
+): string;

scripts/lib/conformance-fixtures.mjs

@@ -0,0 +1,30 @@
+import { createHash } from "node:crypto";
+
+export const LARGE_FIXTURE_COUNT = 1_205;
+
+export const sha256 = (value) =>
+  createHash("sha256").update(value).digest("hex");
+
+export const generateLargeFixture = (count = LARGE_FIXTURE_COUNT) => {
+  if (!Number.isInteger(count) || count < 1)
+    throw new Error("Fixture count must be a positive integer");
+  const declarations = Array.from(
+    { length: count },
+    (_, index) =>
+      `__attribute__((noinline, used)) int rea_page_${String(index).padStart(4, "0")}(void) { puts("REA_PAGE_${String(index).padStart(4, "0")}"); return ${index}; }`,
+  );
+  return [
+    "#include <stdio.h>",
+    ...declarations,
+    "int main(void) { return rea_page_0000(); }",
+    "",
+  ].join("\n");
+};
+
+export const sourceDigest = (sources) => {
+  const canonical = [...sources]
+    .sort(({ path: left }, { path: right }) => left.localeCompare(right))
+    .map(({ path, content }) => `${path}\0${sha256(content)}\n`)
+    .join("");
+  return sha256(canonical);
+};