add hw2

node_modules/langium/lib/test/grammar-coverage.js

@@ -0,0 +1,42 @@
+/******************************************************************************
+ * 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 { isParserRule } from '../languages/generated/ast.js';
+import { getContainerOfType } from '../utils/ast-utils.js';
+export function generateCoverageReport(info) {
+    let total = 0;
+    let covered = 0;
+    const rules = new Map();
+    const coveredRules = new Map();
+    const ruleCoverage = new Map();
+    for (const [element, isCovered] of info) {
+        const rule = getContainerOfType(element, isParserRule);
+        if (rule) {
+            let count = rules.get(rule) || 0;
+            rules.set(rule, ++count);
+            total++;
+            let coveredCount = coveredRules.get(rule) || 0;
+            if (isCovered) {
+                coveredRules.set(rule, ++coveredCount);
+                covered++;
+            }
+            ruleCoverage.set(rule, {
+                covered: coveredCount,
+                total: count,
+                ratio: count === 0 ? 0 : coveredCount / count,
+                rule
+            });
+        }
+    }
+    return {
+        full: {
+            total,
+            covered,
+            ratio: total === 0 ? 0 : covered / total
+        },
+        rules: Array.from(ruleCoverage.values())
+    };
+}
+//# sourceMappingURL=grammar-coverage.js.map