test: define large-library browse strategy contract

server/utils/queries/libraryBrowseCount.js

@@ -0,0 +1,21 @@
+async function loadBrowseCount({ mode, exactCountLoader } = {}) {
+  if (mode === 'skip') {
+    return {
+      total: null,
+      isExact: false,
+      isDeferred: true
+    }
+  }
+
+  const total = await exactCountLoader()
+
+  return {
+    total,
+    isExact: true,
+    isDeferred: mode === 'deferred-exact'
+  }
+}
+
+module.exports = {
+  loadBrowseCount
+}