fix(javascript): share source-map resolution and preserve path uncertainty

src/domain/javascript/javascriptApplicationGraph.fixture.ts

@@ -6,6 +6,7 @@ import {
 } from "./javascriptApplicationGraph.js";
 import type { ApplicationNode } from "./javascriptApplicationGraphSchemas.js";
 import type { ApplicationGraphEvidence } from "./javascriptApplicationEvidenceSchemas.js";
+import { resolveJavaScriptSourceMapReferences } from "./javascriptSourceMapPaths.js";
 
 export const APPLICATION_GRAPH_DIGESTS = {
   package: "1".repeat(64),
@@ -22,6 +23,20 @@ export const completeCoverage = {
   limits: [],
 } satisfies ApplicationGraphEvidence["coverage"];
 
+export const sourceMapReference = (
+  sourceName: string,
+  sourceRoot: string | null,
+  mapPath: string,
+) => {
+  const reference = resolveJavaScriptSourceMapReferences(
+    [sourceName],
+    sourceRoot,
+    mapPath,
+  )[0];
+  if (reference == null) throw new TypeError("Expected a source-map reference");
+  return reference;
+};
+
 const extractor = (operation: string) => ({
   name: "rea-test-fixture",
   version: "1.0.0",