Guard early direct-file staging paths

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

@@ -1240,6 +1240,23 @@ verifyExpectedOutput(
 );
 
 const doWhileBreakBugPath = writeInterpRegressionFile("do-while-break", "bug.ngc");
+const doWhileBreakNgcFiles = [
+  "bug.ngc",
+  "test.ngc",
+];
+assert.deepEqual(
+  doWhileBreakNgcFiles,
+  interpRegressionNgcFilesRecursive("do-while-break"),
+  "interp do-while-break fixture coverage drift",
+);
+assert.deepEqual(
+  [
+    doWhileBreakBugPath,
+    doWhileBreakPath,
+  ],
+  doWhileBreakNgcFiles.map((file) => `/work/interp/do-while-break/${file}`),
+  "interp do-while-break staging manifest drift",
+);
 verifyExpectedOutput(
   "interp_do_while_break_bug_wasm",
   interp.runFile(doWhileBreakBugPath),
@@ -1285,6 +1302,21 @@ verifyExpectedOutput(
 );
 
 const existsPath = writeInterpRegressionFile("exists", "test.ngc");
+const existsNgcFiles = [
+  "test.ngc",
+];
+assert.deepEqual(
+  existsNgcFiles,
+  interpRegressionNgcFilesRecursive("exists"),
+  "interp exists fixture coverage drift",
+);
+assert.deepEqual(
+  [
+    existsPath,
+  ],
+  existsNgcFiles.map((file) => `/work/interp/exists/${file}`),
+  "interp exists staging manifest drift",
+);
 verifyExpectedOutput(
   "interp_exists_wasm",
   interp.runFile(existsPath),
@@ -1300,6 +1332,21 @@ verifyExpectedOutput(
 );
 
 const returnValuePath = writeInterpRegressionFile("return-value", "test.ngc");
+const returnValueNgcFiles = [
+  "test.ngc",
+];
+assert.deepEqual(
+  returnValueNgcFiles,
+  interpRegressionNgcFilesRecursive("return-value"),
+  "interp return-value fixture coverage drift",
+);
+assert.deepEqual(
+  [
+    returnValuePath,
+  ],
+  returnValueNgcFiles.map((file) => `/work/interp/return-value/${file}`),
+  "interp return-value staging manifest drift",
+);
 verifyExpectedOutput(
   "interp_return_value_wasm",
   interp.runFile(returnValuePath),