Guard interp regression staging helper

wasm-port/tests/wasm/node/verify_interp_wasm.mjs

@@ -287,6 +287,22 @@ function writeInterpRegressionFiles(name, files) {
   return wasmDir;
 }
 
+function assertInterpRegressionStaging(name, files, wasmDir) {
+  const sourceDir = resolve(rootDir, "vendor/linuxcnc/tests/interp", name);
+  assert.deepEqual(
+    readdirSync(sourceDir)
+      .filter((filename) => filename.endsWith(".ini") || filename.endsWith(".ngc") || filename.endsWith(".tbl"))
+      .sort(),
+    [...files].sort(),
+    `interp ${name} fixture coverage drift`,
+  );
+  assert.deepEqual(
+    files.map((file) => `${wasmDir}/${file}`),
+    files.map((file) => `/work/interp/${name}/${file}`),
+    `interp ${name} staging manifest drift`,
+  );
+}
+
 function interpRegressionNgcFiles(name) {
   const sourceDir = resolve(rootDir, "vendor/linuxcnc/tests/interp", name);
   return readdirSync(sourceDir)
@@ -1574,17 +1590,8 @@ const camNisleyFiles = [
   "cam.ngc",
   "test.tbl",
 ];
-assert.deepEqual(
-  camNisleyFiles.filter((file) => file.endsWith(".ngc")),
-  interpRegressionNgcFilesRecursive("cam-nisley"),
-  "interp cam-nisley fixture coverage drift",
-);
 const camNisleyDir = writeInterpRegressionFiles("cam-nisley", camNisleyFiles);
-assert.deepEqual(
-  camNisleyFiles.map((file) => `${camNisleyDir}/${file}`),
-  camNisleyFiles.map((file) => `/work/interp/cam-nisley/${file}`),
-  "interp cam-nisley staging manifest drift",
-);
+assertInterpRegressionStaging("cam-nisley", camNisleyFiles, camNisleyDir);
 interp.writeTextFile(
   `${camNisleyDir}/test.ini`,
   [
@@ -2321,17 +2328,8 @@ const g76Files = [
   "g76only.ngc",
   "test.tbl",
 ];
-assert.deepEqual(
-  g76Files.filter((file) => file.endsWith(".ngc")),
-  interpRegressionNgcFilesRecursive("g76"),
-  "interp g76 fixture coverage drift",
-);
 const g76Dir = writeInterpRegressionFiles("g76", g76Files);
-assert.deepEqual(
-  g76Files.map((file) => `${g76Dir}/${file}`),
-  g76Files.map((file) => `/work/interp/g76/${file}`),
-  "interp g76 staging manifest drift",
-);
+assertInterpRegressionStaging("g76", g76Files, g76Dir);
 interp.writeTextFile(
   `${g76Dir}/test.ini`,
   [