Fix template name handling and add tests

packages/create-react-app/__tests__/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "env": {
+    "jest": true
+  }
+}

packages/create-react-app/__tests__/getTemplateInstallPackage.test.js

@@ -0,0 +1,82 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const { getTemplateInstallPackage } = require('../createReactApp');
+
+describe('getTemplateInstallPackage', () => {
+  it('no options gives cra-template', async () => {
+    await expect(getTemplateInstallPackage()).resolves.toBe('cra-template');
+  });
+
+  it('cra-template gives cra-template', async () => {
+    await expect(getTemplateInstallPackage('cra-template')).resolves.toBe(
+      'cra-template'
+    );
+  });
+
+  it('cra-template-typescript gives cra-template-typescript', async () => {
+    await expect(getTemplateInstallPackage('cra-template-typescript')).resolves.toBe(
+      'cra-template-typescript'
+    );
+  });
+
+  it('typescript gives cra-template-typescript', async () => {
+    await expect(getTemplateInstallPackage('typescript')).resolves.toBe(
+      'cra-template-typescript'
+    );
+  });
+
+  it('typescript@next gives cra-template-typescript@next', async () => {
+    await expect(getTemplateInstallPackage('cra-template-typescript@next')).resolves.toBe(
+      'cra-template-typescript@next'
+    );
+  });
+
+  it('cra-template@next gives cra-template@next', async () => {
+    await expect(getTemplateInstallPackage('cra-template@next')).resolves.toBe(
+      'cra-template@next'
+    );
+  });
+
+  it('cra-template-typescript@next gives cra-template-typescript@next', async () => {
+    await expect(getTemplateInstallPackage('cra-template-typescript@next')).resolves.toBe(
+      'cra-template-typescript@next'
+    );
+  });
+
+  it('@iansu gives @iansu/cra-template', async () => {
+    await expect(getTemplateInstallPackage('@iansu')).resolves.toBe(
+      '@iansu/cra-template'
+    );
+  });
+
+  it('@iansu/cra-template gives @iansu/cra-template', async () => {
+    await expect(
+      getTemplateInstallPackage('@iansu/cra-template')
+    ).resolves.toBe('@iansu/cra-template');
+  });
+
+  it('@iansu/cra-template@next gives @iansu/cra-template@next', async () => {
+    await expect(
+      getTemplateInstallPackage('@iansu/cra-template@next')
+    ).resolves.toBe('@iansu/cra-template@next');
+  });
+
+  it('@iansu/cra-template-typescript@next gives @iansu/cra-template-typescript@next', async () => {
+    await expect(getTemplateInstallPackage('@iansu/cra-template-typescript@next')).resolves.toBe(
+      '@iansu/cra-template-typescript@next'
+    );
+  });
+
+  it('http://example.com/cra-template.tar.gz gives http://example.com/cra-template.tar.gz', async () => {
+    await expect(
+      getTemplateInstallPackage('http://example.com/cra-template.tar.gz')
+    ).resolves.toBe('http://example.com/cra-template.tar.gz');
+  });
+});