Set detail not details (#11)

* Set  not

* Add test

Author: khiga8

.eslintrc.js

@@ -13,5 +13,6 @@ module.exports = {
   rules: {
     "import/no-commonjs": "off",
     "filenames/match-regex": "off",
+    "i18n-text/no-en": "off",
   },
 };

no-default-alt-text.js

@@ -23,7 +23,7 @@ module.exports = {
         if (image.content.match(altTextRegex)) {
           onError({
             lineNumber: image.lineNumber,
-            details: `For image: ${image.content}`,
+            detail: `For image: ${image.content}`,
           });
         }
       }
@@ -35,7 +35,7 @@ module.exports = {
       if (line.match(altTextTagRegex)) {
         onError({
           lineNumber,
-          details: `For image: ${line}`,
+          detail: `For image: ${line}`,
         });
       }
       lineNumber++;

test/no-default-alt-text.test.js

@@ -75,6 +75,7 @@ describe("GH001: No Default Alt Text", () => {
         expect(rule).toBe(thisRuleName);
       }
     });
+
     test("HTML example", async () => {
       const strings = [
         '<img alt="Screen Shot 2022-06-26 at 7 41 30 PM" src="https://user-images.githubusercontent.com/abcdef.png">',
@@ -95,5 +96,27 @@ describe("GH001: No Default Alt Text", () => {
         expect(rule).toBe(thisRuleName);
       }
     });
+
+    test("error message", async () => {
+      const strings = [
+        "![Screen Shot 2022-06-26 at 7 41 30 PM](https://user-images.githubusercontent.com/abcdef.png)",
+        '<img alt="Screen Shot 2022-06-26 at 7 41 30 PM" src="https://user-images.githubusercontent.com/abcdef.png">',
+      ];
+
+      const results = await runTest(strings);
+
+      expect(results[0].ruleDescription).toMatch(
+        /Images should not use the MacOS default screenshot filename as alternate text/
+      );
+      expect(results[0].errorDetail).toBe(
+        "For image: Screen Shot 2022-06-26 at 7 41 30 PM"
+      );
+      expect(results[1].ruleDescription).toMatch(
+        /Images should not use the MacOS default screenshot filename as alternate text/
+      );
+      expect(results[1].errorDetail).toBe(
+        'For image: <img alt="Screen Shot 2022-06-26 at 7 41 30 PM" src="https://user-images.githubusercontent.com/abcdef.png">'
+      );
+    });
   });
 });