Guard ccomp staging paths

wasm-port/tests/browser/interp_smoke.html

@@ -4687,6 +4687,21 @@
       return wasmDir;
     }
 
+    const ccompRegressionFiles = [
+      "test.ngc",
+      "test.tbl",
+    ];
+
+    function assertCcompRegressionStaging(name, wasmDir) {
+      if (ccompRegressionFiles.length !== 2 || new Set(ccompRegressionFiles).size !== ccompRegressionFiles.length) {
+        throw new Error("browser_interp_ccomp_fixture_coverage: list drift");
+      }
+      const ccompStagedRelativeFiles = ccompRegressionFiles.map((file) => `${wasmDir}/${file}`.replace(`/work/browser-ccomp/${name}/`, ""));
+      if (ccompStagedRelativeFiles.join(",") !== ccompRegressionFiles.join(",")) {
+        throw new Error(`browser_interp_ccomp_${name}_staging_manifest: list drift`);
+      }
+    }
+
     async function writeG10RegressionFiles(interp, name, files) {
       const sourceDir = `../../vendor/linuxcnc/tests/interp/g10/${name}`;
       const wasmDir = `/work/browser-interp/g10/${name}`;
@@ -6765,6 +6780,7 @@
       );
 
       const ccompLatheCompDir = await writeCcompRegressionFiles(interp, "lathe-comp");
+      assertCcompRegressionStaging("lathe-comp", ccompLatheCompDir);
       verifyExpectedOutput(
         "browser_interp_ccomp_lathe_comp",
         interp.runFileWithIni(
@@ -6789,6 +6805,7 @@
         interp,
         "mill-g90g91g92",
       );
+      assertCcompRegressionStaging("mill-g90g91g92", ccompMillG90G91G92Dir);
       verifyExpectedOutput(
         "browser_interp_ccomp_mill_g90g91g92",
         interp.runFileWithIni(
@@ -6812,6 +6829,7 @@
         interp,
         "mill-line-arc-entry",
       );
+      assertCcompRegressionStaging("mill-line-arc-entry", ccompMillLineArcEntryDir);
       verifyExpectedOutput(
         "browser_interp_ccomp_mill_line_arc_entry",
         interp.runFileWithIni(
@@ -6832,6 +6850,7 @@
       );
 
       const ccompMillZchangesDir = await writeCcompRegressionFiles(interp, "mill-zchanges");
+      assertCcompRegressionStaging("mill-zchanges", ccompMillZchangesDir);
       verifyExpectedOutput(
         "browser_interp_ccomp_mill_zchanges",
         interp.runFileWithIni(