Guard local gcode fixture staging

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

@@ -106,6 +106,15 @@ function writeVendorTextFile(sourcePath, wasmPath, targetInterp = interp) {
   targetInterp.writeTextFile(wasmPath, readFileSync(sourcePath, "utf8"));
 }
 
+function writeLocalGcodeFixture(fixtureName, wasmPath, expectedWasmPath, targetInterp = interp) {
+  assert.equal(wasmPath, expectedWasmPath, `${fixtureName} local gcode staging path drift`);
+  targetInterp.writeTextFile(
+    wasmPath,
+    readFileSync(resolve(rootDir, `tests/fixtures/gcode/${fixtureName}.ngc`), "utf8"),
+  );
+  return wasmPath;
+}
+
 function stageInterpIniContext(name, programFile = "test.ngc") {
   const sourceRootRel = `tests/interp/${name}`;
   const iniText = readFileSync(
@@ -767,13 +776,10 @@ verifyExpectedOutput(
   ].join("\n"),
 );
 
-const coordinateOffsetsFilePath = `/work/${INTERP_COORDINATE_OFFSETS_FILE_FIXTURE}.ngc`;
-interp.writeTextFile(
-  coordinateOffsetsFilePath,
-  readFileSync(
-    resolve(rootDir, `tests/fixtures/gcode/${INTERP_COORDINATE_OFFSETS_FILE_FIXTURE}.ngc`),
-    "utf8",
-  ),
+const coordinateOffsetsFilePath = writeLocalGcodeFixture(
+  INTERP_COORDINATE_OFFSETS_FILE_FIXTURE,
+  `/work/${INTERP_COORDINATE_OFFSETS_FILE_FIXTURE}.ngc`,
+  `/work/${INTERP_COORDINATE_OFFSETS_FILE_FIXTURE}.ngc`,
 );
 verifyExpectedOutput(
   `${INTERP_COORDINATE_OFFSETS_FILE_FIXTURE}_file`,
@@ -787,13 +793,10 @@ verifyExpectedOutput(
   ).trimEnd(),
 );
 
-const positionParamsFilePath = "/work/position_params.ngc";
-interp.writeTextFile(
-  positionParamsFilePath,
-  readFileSync(
-    resolve(rootDir, `tests/fixtures/gcode/${INTERP_POSITION_PARAMS_FILE_FIXTURE}.ngc`),
-    "utf8",
-  ),
+const positionParamsFilePath = writeLocalGcodeFixture(
+  INTERP_POSITION_PARAMS_FILE_FIXTURE,
+  `/work/${INTERP_POSITION_PARAMS_FILE_FIXTURE}.ngc`,
+  `/work/${INTERP_POSITION_PARAMS_FILE_FIXTURE}.ngc`,
 );
 verifyExpectedOutput(
   `${INTERP_POSITION_PARAMS_FILE_FIXTURE}_file`,