eslint-module-utils: Add test for when resolver version is not specified

tests/files/foo-bar-resolver-no-version.js

@@ -0,0 +1,15 @@
+var path = require('path')
+
+exports.resolveImport = function (modulePath, sourceFile, config) {
+  var fooPathSuffix = '/files/foo.js'
+  var exceptionPathSuffix = '/files/exception.js'
+  if (sourceFile.indexOf(fooPathSuffix) === sourceFile.length - fooPathSuffix.length) {
+    return path.join(__dirname, 'bar.jsx')
+  }
+  else if (sourceFile.indexOf(exceptionPathSuffix) === sourceFile.length - exceptionPathSuffix.length) {
+    throw new Error('foo-bar-resolver-v1 resolveImport test exception')
+  }
+  else {
+    return undefined
+  }
+}

tests/src/core/resolve.js

@@ -27,6 +27,22 @@ describe('resolve', function () {
                     )).to.equal(undefined)
   })
 
+  it('resolves via a custom resolver with interface version 1 assumed if not specified', function () {
+    const testContext = utils.testContext({ 'import/resolver': './foo-bar-resolver-no-version'})
+
+    expect(resolve( '../files/foo'
+                      , Object.assign({}, testContext, { getFilename: function () { return utils.getFilename('foo.js') } })
+                      )).to.equal(utils.testFilePath('./bar.jsx'))
+
+    expect(resolve( '../files/exception'
+                      , Object.assign({}, testContext, { getFilename: function () { return utils.getFilename('exception.js') } })
+                    )).to.equal(undefined)
+
+    expect(resolve( '../files/not-found'
+                      , Object.assign({}, testContext, { getFilename: function () { return utils.getFilename('not-found.js') } })
+                    )).to.equal(undefined)
+  })
+
   it('resolves via a custom resolver with interface version 2', function () {
     const testContext = utils.testContext({ 'import/resolver': './foo-bar-resolver-v2'})
     const testContextReports = []