Show suggestion only when unrecognized cli param is longer than 1 cha…

…racter (#10604)

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ### Fixes
 
+- `[jest-validate]` Show suggestion only when unrecognized cli param is longer than 1 character ([#10604](https://github.com/facebook/jest/pull/10604))
+
 ### Chore & Maintenance
 
 ### Performance

packages/jest-validate/src/__tests__/__snapshots__/validateCLIOptions.test.js.snap

@@ -1,5 +1,15 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`does not show suggestion when unrecognized cli param length <= 1 1`] = `
+"<red><bold><bold>●</><bold> Unrecognized CLI Parameter</>:</>
+<red></>
+<red>  Unrecognized option <bold>\\"l\\"</>.</>
+<red></>
+<red>  <bold>CLI Options Documentation</>:</>
+<red>  https://jestjs.io/docs/en/cli.html</>
+<red></>"
+`;
+
 exports[`fails for multiple unknown options 1`] = `
 "<red><bold><bold>●</><bold> Unrecognized CLI Parameters</>:</>
 <red></>
@@ -20,3 +30,13 @@ exports[`fails for unknown option 1`] = `
 <red>  https://jestjs.io/docs/en/cli.html</>
 <red></>"
 `;
+
+exports[`shows suggestion when unrecognized cli param length > 1 1`] = `
+"<red><bold><bold>●</><bold> Unrecognized CLI Parameter</>:</>
+<red></>
+<red>  Unrecognized option <bold>\\"hell\\"</>. Did you mean <bold>\\"help\\"</>?</>
+<red></>
+<red>  <bold>CLI Options Documentation</>:</>
+<red>  https://jestjs.io/docs/en/cli.html</>
+<red></>"
+`;

packages/jest-validate/src/__tests__/validateCLIOptions.test.js

@@ -41,3 +41,25 @@ test('fails for multiple unknown options', () => {
     validateCLIOptions(argv, options),
   ).toThrowErrorMatchingSnapshot();
 });
+
+test('does not show suggestion when unrecognized cli param length <= 1', () => {
+  const options = ['$0', '_', 'help', 'h'];
+  const argv = {
+    $0: true,
+    l: true,
+  };
+  expect(() =>
+    validateCLIOptions(argv, options),
+  ).toThrowErrorMatchingSnapshot();
+});
+
+test('shows suggestion when unrecognized cli param length > 1', () => {
+  const options = ['$0', '_', 'help', 'h'];
+  const argv = {
+    $0: true,
+    hell: true,
+  };
+  expect(() =>
+    validateCLIOptions(argv, options),
+  ).toThrowErrorMatchingSnapshot();
+});

packages/jest-validate/src/validateCLIOptions.ts

@@ -31,10 +31,10 @@ const createCLIValidationError = (
 
   if (unrecognizedOptions.length === 1) {
     const unrecognized = unrecognizedOptions[0];
-    const didYouMeanMessage = createDidYouMeanMessage(
-      unrecognized,
-      Array.from(allowedOptions),
-    );
+    const didYouMeanMessage =
+      unrecognized.length > 1
+        ? createDidYouMeanMessage(unrecognized, Array.from(allowedOptions))
+        : '';
     message =
       `  Unrecognized option ${chalk.bold(format(unrecognized))}.` +
       (didYouMeanMessage ? ` ${didYouMeanMessage}` : '');