Give total number of tests in result as well.

.ncurc

@@ -1,3 +1,4 @@
 {
-  "dep": ["prod", "dev", "packageManager"]
+  "dep": ["prod", "dev", "packageManager"],
+  "reject": ["typescript"]
 }

lib/index.js

@@ -17,6 +17,7 @@ let counter = 0;
  * @typedef {object} TestCounts
  * @prop {number} valid
  * @prop {number} invalid
+ * @prop {number} total
  * @prop {string} grammarPath
  * @prop {string} modifiedPath
  */
@@ -61,6 +62,20 @@ let counter = 0;
  * @typedef {import('peggy').Location} Location
  */
 
+/**
+ * Add the formatted information to the given error.
+ *
+ * @param {unknown} e
+ * @param {string} source
+ * @param {string} text
+ */
+function format(e, source, text) {
+  const er = /** @type {import('peggy').parser.SyntaxError} */(e);
+  if (typeof er?.format === "function") {
+    er.message = er.format([{ source, text }]);
+  }
+}
+
 /**
  * @template T
  * @param {Parser} grammar
@@ -101,9 +116,8 @@ function checkParserStarts(grammar, starts, modified, counts) {
           ...options,
         });
       } catch (er) {
-        const e = /** @type {import('peggy').parser.SyntaxError} */ (er);
-        e.message = e.format([{ source, text: start.validInput }]);
-        throw e;
+        format(er, source, start.validInput);
+        throw er;
       }
       if (typeof expected === "string") {
         equal(res, expected, `${source} (eq): "${start.validInput}"`);
@@ -175,6 +189,7 @@ function checkParserStarts(grammar, starts, modified, counts) {
         }));
       }
       counts.valid++;
+      counts.total++;
     }
 
     if (typeof start.invalidInput === "string") {
@@ -221,6 +236,7 @@ function checkParserStarts(grammar, starts, modified, counts) {
         equal(typeof fmt, "string");
       }
       counts.invalid++;
+      counts.total++;
     }
   }
 }
@@ -270,6 +286,7 @@ export async function testPeggy(grammarUrl, starts, opts) {
   const counts = {
     valid: 0,
     invalid: 0,
+    total: 0,
     grammarPath,
     modifiedPath,
   };

test/index.test.js

@@ -84,6 +84,7 @@ test("test peggy coverage", async() => {
   deepEqual(counts, {
     valid: 11,
     invalid: 9,
+    total: 20,
   });
 });
 
@@ -101,6 +102,7 @@ test("noGenerate", async() => {
   deepEqual(counts, {
     valid: 1,
     invalid: 1,
+    total: 2,
   });
 });
 
@@ -118,6 +120,7 @@ test("noMap", async() => {
   deepEqual(counts, {
     valid: 2,
     invalid: 2,
+    total: 4,
   });
 });
 
@@ -140,6 +143,7 @@ test("skip", async() => {
   deepEqual(counts, {
     valid: 2,
     invalid: 0,
+    total: 2,
   });
 });
 
@@ -158,6 +162,7 @@ test("skip", async() => {
   deepEqual(counts, {
     valid: 2,
     invalid: 0,
+    total: 2,
   });
 });