sets project name if empty fixes #5597

CHANGELOG.md

@@ -24,6 +24,7 @@
 - `[jest-snapshot]` Add error messages for invalid property matchers. ([#6528](https://github.com/facebook/jest/pull/6528))
 - `[jest-cli]` Show open handles from inside test files as well ([#6263](https://github.com/facebook/jest/pull/6263))
 - `[jest-haste-map]` Fix a problem where creating folders ending with `.js` could cause a crash ([#6818](https://github.com/facebook/jest/pull/6818))
+- `[jest-config]` Add name to project if one does not exist to pick correct resolver ([#5862](https://github.com/facebook/jest/pull/5862))
 
 ### Chore & Maintenance
 

packages/jest-cli/src/cli/index.js

@@ -295,6 +295,7 @@ const getConfigs = (
       .filter(root => {
         // Ignore globbed files that cannot be `require`d.
         if (
+          typeof root === 'string' &&
           fs.existsSync(root) &&
           !fs.lstatSync(root).isDirectory() &&
           !root.endsWith('.js') &&

packages/jest-config/src/__tests__/normalize.test.js

@@ -64,6 +64,66 @@ it('picks a name based on the rootDir', () => {
   ).toBe(expected);
 });
 
+it('picks a name for projects based on the main rootDir', () => {
+  const rootDir = '/root/path/foo';
+  const firstExpected = crypto
+    .createHash('md5')
+    .update('/root/path/foo:0')
+    .digest('hex');
+  const secondExpected = crypto
+    .createHash('md5')
+    .update('/root/path/foo:1')
+    .digest('hex');
+
+  const options = normalize(
+    {
+      projects: [{}, {}],
+      rootDir,
+    },
+    {},
+  );
+
+  expect(options.options.projects[0].name).toBe(firstExpected);
+  expect(options.options.projects[1].name).toBe(secondExpected);
+});
+
+it('picks a name for projects based on the projects rootDir', () => {
+  const firstRootDir = '/root/path/foo';
+  const secondRootDir = '/root/path/bar';
+  const firstExpected = crypto
+    .createHash('md5')
+    .update('/root/path/foo')
+    .digest('hex');
+  const secondExpected = crypto
+    .createHash('md5')
+    .update('/root/path/bar')
+    .digest('hex');
+
+  const options = normalize(
+    {
+      projects: [{rootDir: firstRootDir}, {rootDir: secondRootDir}],
+      rootDir: '/root/path/baz',
+    },
+    {},
+  );
+
+  expect(options.options.projects[0].name).toBe(firstExpected);
+  expect(options.options.projects[1].name).toBe(secondExpected);
+});
+
+it('keeps custom project name based on the projects rootDir', () => {
+  const name = 'test';
+  const options = normalize(
+    {
+      projects: [{name, rootDir: '/path/to/foo'}],
+      rootDir: '/root/path/baz',
+    },
+    {},
+  );
+
+  expect(options.options.projects[0].name).toBe(name);
+});
+
 it('keeps custom names based on the rootDir', () => {
   expect(
     normalize(

packages/jest-config/src/normalize.js

@@ -236,6 +236,19 @@ const normalizeMissingOptions = (options: InitialOptions): InitialOptions => {
       .digest('hex');
   }
 
+  if (Array.isArray(options.projects)) {
+    options.projects = options.projects.map((project, index) => {
+      if (typeof project !== 'string' && !project.name) {
+        project.name = crypto
+          .createHash('md5')
+          .update(project.rootDir || `${options.rootDir}:${index}`)
+          .digest('hex');
+      }
+
+      return project;
+    });
+  }
+
   if (!options.setupFiles) {
     options.setupFiles = [];
   }