22541 extract breadcrumb route-map helpers and add precedence guard tests

lib/routing/breadcrumbRouteMaps.js

@@ -0,0 +1,29 @@
+const getMappedRendererByPath = (path, routeRendererMap) =>
+    routeRendererMap[path] || null;
+
+const resolveMappedRouteRenderer = (path, routeRendererMaps = []) => {
+    for (const routeRendererMap of routeRendererMaps) {
+        const routeRenderer = getMappedRendererByPath(path, routeRendererMap);
+        if (routeRenderer) {
+            return routeRenderer;
+        }
+    }
+
+    return null;
+};
+
+const buildBreadcrumbRendererMaps = ({
+    simpleRouteRenderersByPath,
+    simpleLinkTextPairRenderersByPath,
+    simpleMyPortalRouteRenderersByPath
+}) => [
+    simpleRouteRenderersByPath,
+    simpleLinkTextPairRenderersByPath,
+    simpleMyPortalRouteRenderersByPath
+];
+
+module.exports = {
+    buildBreadcrumbRendererMaps,
+    getMappedRendererByPath,
+    resolveMappedRouteRenderer
+};