Add a homoglyph detector for gradle-wrapper.jar files

__tests__/find.test.ts

@@ -4,7 +4,8 @@ import * as find from '../src/find'
 test('finds test data wrapper jars', async () => {
   const repoRoot = path.resolve('.')
   const wrapperJars = await find.findWrapperJars(repoRoot)
-  expect(wrapperJars.length).toBe(2)
+  expect(wrapperJars.length).toBe(3)
   expect(wrapperJars).toContain('__tests__/data/valid/gradle-wrapper.jar')
   expect(wrapperJars).toContain('__tests__/data/invalid/gradle-wrapper.jar')
+  expect(wrapperJars).toContain('__tests__/data/invalid/gradlе-wrapper.jar') // homoglyph
 })

__tests__/validate.test.ts

@@ -4,11 +4,11 @@ import * as validate from '../src/validate'
 test('validates wrapper jars', async () => {
   const invalidWrapperJars = await validate.findInvalidWrapperJars(
     path.resolve('.'),
-    2,
+    3,
     false,
     []
   )
-  expect(invalidWrapperJars.length).toBe(1)
+  expect(invalidWrapperJars.length).toBe(2)
   expect(invalidWrapperJars[0]).toEqual(
     new validate.InvalidWrapperJar(
       '__tests__/data/invalid/gradle-wrapper.jar',
@@ -19,8 +19,8 @@ test('validates wrapper jars', async () => {
 
 test('fails if not enough wrapper jars are found', async () => {
   await expect(
-    validate.findInvalidWrapperJars(path.resolve('.'), 3, false, [])
+    validate.findInvalidWrapperJars(path.resolve('.'), 4, false, [])
   ).rejects.toThrowError(
-    'Expected to find at least 3 Gradle Wrapper JARs but got only 2'
+    'Expected to find at least 4 Gradle Wrapper JARs but got only 3'
   )
 })

jest.config.js

@@ -7,5 +7,6 @@ module.exports = {
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
-  verbose: true
+  verbose: true,
+  setupFilesAfterEnv: ['./jest.setup.js']
 }

jest.setup.js

@@ -0,0 +1 @@
+jest.setTimeout(10000) // in milliseconds

src/find.ts

@@ -2,12 +2,17 @@ import * as util from 'util'
 import * as path from 'path'
 import * as fs from 'fs'
 
+import * as homoglyphs from './homoglyphs'
+
 const readdir = util.promisify(fs.readdir)
 
 export async function findWrapperJars(baseDir: string): Promise<string[]> {
+  const targetWords = ['gradle-wrapper.jar']
   const files = await recursivelyListFiles(baseDir)
   return files
-    .filter(file => file.endsWith('gradle-wrapper.jar'))
+    .filter(
+      file => homoglyphs.search(path.basename(file), targetWords).length > 0
+    )
     .map(wrapperJar => path.relative(baseDir, wrapperJar))
 }