feat: make project name lowercased in package.json (#1370)

* fix: make project name lowercased in package.json

* refactor: address comments from review

* refactor: update snapshot

Author: lukewalczak

packages/cli/src/commands/init/__fixtures__/editTemplate/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "PlaceholderName",
+  "version": "0.0.1"
+}

packages/cli/src/commands/init/__tests__/__snapshots__/editTemplate.test.ts.snap

@@ -1,5 +1,17 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`changePlaceholderInTemplate should produce a lowercased version of "ProjectName" in package.json "name" field 1`] = `
+"Snapshot Diff:
+- First value
++ Second value
+
+@@ -1,3 +1,3 @@
+  {
+-   \\"name\\": \\"PlaceholderName\\",
++   \\"name\\": \\"projectname\\",
+    \\"version\\": \\"0.0.1\\""
+`;
+
 exports[`should edit template 1`] = `
 "Snapshot Diff:
 - First value

packages/cli/src/commands/init/__tests__/editTemplate.test.ts

@@ -124,3 +124,33 @@ test('should edit template with custom title', () => {
     snapshotDiff(oldJavaFile, newJavaFile, {contextLines: 1}),
   ).toMatchSnapshot();
 });
+
+describe('changePlaceholderInTemplate', () => {
+  beforeEach(() => {
+    jest.spyOn(process, 'cwd').mockImplementation(() => testPath);
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+  });
+
+  test(`should produce a lowercased version of "${PROJECT_NAME}" in package.json "name" field`, () => {
+    changePlaceholderInTemplate({
+      projectName: PROJECT_NAME,
+      placeholderName: PLACEHOLDER_NAME,
+    });
+
+    const oldPackageJsonFile = fs.readFileSync(
+      path.resolve(FIXTURE_DIR, 'package.json'),
+      'utf8',
+    );
+    const newPackageJsonFile = fs.readFileSync(
+      path.resolve(testPath, 'package.json'),
+      'utf8',
+    );
+
+    expect(
+      snapshotDiff(oldPackageJsonFile, newPackageJsonFile, {contextLines: 1}),
+    ).toMatchSnapshot();
+  });
+});

packages/cli/src/commands/init/editTemplate.ts

@@ -22,6 +22,7 @@ function replaceNameInUTF8File(
   templateName: string,
 ) {
   logger.debug(`Replacing in ${filePath}`);
+  const isPackageJson = path.basename(filePath) === 'package.json';
   const fileContent = fs.readFileSync(filePath, 'utf8');
   const replacedFileContent = fileContent
     .replace(new RegExp(templateName, 'g'), projectName)
@@ -33,6 +34,14 @@ function replaceNameInUTF8File(
   if (fileContent !== replacedFileContent) {
     fs.writeFileSync(filePath, replacedFileContent, 'utf8');
   }
+
+  if (isPackageJson) {
+    fs.writeFileSync(
+      filePath,
+      fileContent.replace(templateName, projectName.toLowerCase()),
+      'utf8',
+    );
+  }
 }
 
 function renameFile(filePath: string, oldName: string, newName: string) {