Add contexts, testLoader, & documentLoader to separate files.

test/testContextLoader.js

@@ -0,0 +1,47 @@
+/*!
+ * Copyright (c) 2019-2023 Digital Bazaar, Inc. All rights reserved.
+ */
+import * as vc from '../lib/index.js';
+import {
+  invalidContexts,
+  validContexts
+} from './contexts/index.js';
+import jsigs from 'jsonld-signatures';
+import jsonld from 'jsonld';
+import {MultiLoader} from './MultiLoader.js';
+
+export const contexts = new Map();
+
+// add the invalid contexts to the loader
+for(const key in invalidContexts) {
+  const {url, value} = invalidContexts[key];
+  contexts.set(url, value);
+}
+// add the valid contexts to the loader
+for(const key in validContexts) {
+  const {url, value} = validContexts[key];
+  contexts.set(url, value);
+}
+const {extendContextLoader} = jsigs;
+const {defaultDocumentLoader} = vc;
+
+const testContextLoader = extendContextLoader(async url => {
+  const context = contexts.get(url);
+  if(context) {
+    return {
+      contextUrl: null,
+      document: jsonld.clone(context),
+      documentUrl: url
+    };
+  }
+  return defaultDocumentLoader(url);
+});
+
+// documents are added to this documentLoader incrementally
+export const testLoader = new MultiLoader({
+  documentLoader: [
+    testContextLoader
+  ]
+});
+export const documentLoader = testLoader.documentLoader.bind(testLoader);
+