add hw2

node_modules/langium/lib/test/virtual-file-system.js

@@ -0,0 +1,56 @@
+/******************************************************************************
+ * Copyright 2024 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+import { URI } from 'vscode-uri';
+import { UriTrie } from '../utils/uri-utils.js';
+export class VirtualFileSystemProvider {
+    constructor() {
+        this.trie = new UriTrie();
+    }
+    insert(uri, content) {
+        this.trie.insert(uri, content);
+    }
+    delete(uri) {
+        this.trie.delete(uri);
+    }
+    stat(uri) {
+        return Promise.resolve(this.statSync(uri));
+    }
+    statSync(uri) {
+        const node = this.trie.findNode(uri);
+        if (node) {
+            return {
+                isDirectory: node.element === undefined,
+                isFile: node.element !== undefined,
+                uri
+            };
+        }
+        else {
+            throw new Error('File not found');
+        }
+    }
+    readFile(uri) {
+        const data = this.trie.find(uri);
+        if (typeof data === 'string') {
+            return Promise.resolve(data);
+        }
+        else {
+            throw new Error('File not found');
+        }
+    }
+    readDirectory(uri) {
+        const node = this.trie.findNode(uri);
+        if (!node) {
+            throw new Error('Directory not found');
+        }
+        const children = this.trie.findChildren(uri);
+        return Promise.resolve(children.map(child => ({
+            isDirectory: child.element === undefined,
+            isFile: child.element !== undefined,
+            uri: URI.parse(child.uri)
+        })));
+    }
+}
+//# sourceMappingURL=virtual-file-system.js.map