feat(valid-title): support detecting & fixing trailing spaces in titles (#449)

Author: G-Rath

docs/rules/valid-title.md

@@ -54,6 +54,10 @@ describe('foo', () => {
 describe(' foo', () => {
   test('bar', () => {});
 });
+
+describe('foo  ', () => {
+  test('bar', () => {});
+});
 ```
 
 Examples of **correct** code for this rule

src/rules/__tests__/valid-title.test.ts

@@ -41,6 +41,11 @@ ruleTester.run('no-accidental-space', rule, {
       errors: [{ messageId: 'accidentalSpace', column: 10, line: 1 }],
       output: 'describe("foo foe fum", function () {})',
     },
+    {
+      code: 'describe("foo foe fum ", function () {})',
+      errors: [{ messageId: 'accidentalSpace', column: 10, line: 1 }],
+      output: 'describe("foo foe fum", function () {})',
+    },
     {
       code: 'fdescribe(" foo", function () {})',
       errors: [{ messageId: 'accidentalSpace', column: 11, line: 1 }],
@@ -66,6 +71,11 @@ ruleTester.run('no-accidental-space', rule, {
       errors: [{ messageId: 'accidentalSpace', column: 5, line: 1 }],
       output: 'fit("foo", function () {})',
     },
+    {
+      code: 'fit("foo ", function () {})',
+      errors: [{ messageId: 'accidentalSpace', column: 5, line: 1 }],
+      output: 'fit("foo", function () {})',
+    },
     {
       code: 'xit(" foo", function () {})',
       errors: [{ messageId: 'accidentalSpace', column: 5, line: 1 }],
@@ -86,11 +96,21 @@ ruleTester.run('no-accidental-space', rule, {
       errors: [{ messageId: 'accidentalSpace', column: 6, line: 1 }],
       output: 'test(`foo bar bang`, function () {})',
     },
+    {
+      code: 'test(` foo bar bang  `, function () {})',
+      errors: [{ messageId: 'accidentalSpace', column: 6, line: 1 }],
+      output: 'test(`foo bar bang`, function () {})',
+    },
     {
       code: 'xtest(" foo", function () {})',
       errors: [{ messageId: 'accidentalSpace', column: 7, line: 1 }],
       output: 'xtest("foo", function () {})',
     },
+    {
+      code: 'xtest(" foo  ", function () {})',
+      errors: [{ messageId: 'accidentalSpace', column: 7, line: 1 }],
+      output: 'xtest("foo", function () {})',
+    },
     {
       code: `
       describe(' foo', () => {

src/rules/valid-title.ts

@@ -24,7 +24,7 @@ export default createRule({
     },
     messages: {
       duplicatePrefix: 'should not have duplicate prefix',
-      accidentalSpace: 'should not have space in the beginning',
+      accidentalSpace: 'should not have leading or trailing spaces',
     },
     type: 'suggestion',
     schema: [],
@@ -50,7 +50,7 @@ export default createRule({
           return;
         }
 
-        if (title.trimLeft().length !== title.length) {
+        if (title.trim().length !== title.length) {
           context.report({
             messageId: 'accidentalSpace',
             node: argument,
@@ -63,7 +63,9 @@ export default createRule({
               return [
                 fixer.replaceTextRange(
                   argument.range,
-                  stringValue.replace(/^([`'"]) +?/, '$1'),
+                  stringValue
+                    .replace(/^([`'"]) +?/, '$1')
+                    .replace(/ +?([`'"])$/, '$1'),
                 ),
               ];
             },