Allow projects in TypeScript Config to be an array of ProjectConfig

CHANGELOG.md

@@ -59,6 +59,7 @@
 - `[jest-jasmine2]` Fixed the issue of `beforeAll` & `afterAll` hooks getting executed even if it is inside a skipped `describe` block when it has child `tests` marked as either `only` or `todo` [#10451](https://github.com/facebook/jest/issues/10451)
 - `[jest-jasmine2]` Fixed the issues of child `tests` marked with `only` or `todo` getting executed even if it is inside a skipped parent `describe` block [#10451](https://github.com/facebook/jest/issues/10451)
 - `[jest-reporter]` Handle empty files when reporting code coverage with V8 ([#10819](https://github.com/facebook/jest/pull/10819))
+- `[jest-reporters]` Fix `Config.ts` `projects` types and better handle `displayName` ([#11285](https://github.com/facebook/jest/pull/11285))
 - `[jest-resolve]` Replace read-pkg-up with escalade package ([#10781](https://github.com/facebook/jest/pull/10781))
 - `[jest-resolve]` Disable `jest-pnp-resolver` for Yarn 2 ([#10847](https://github.com/facebook/jest/pull/10847))
 - `[jest-runtime]` [**BREAKING**] Do not inject `global` variable into module wrapper ([#10644](https://github.com/facebook/jest/pull/10644))

packages/jest-reporters/src/__tests__/__snapshots__/utils.test.ts.snap

@@ -6,6 +6,8 @@ exports[`printDisplayName should default displayName color to white when color i
 
 exports[`printDisplayName should default displayName color to white when displayName is a string 1`] = `"</><inverse><white> hello </></></>"`;
 
+exports[`printDisplayName should correctly print the displayName when given just a string 1`] = `"</><inverse><white> hello </></></>"`;
+
 exports[`trimAndFormatPath() does not trim anything 1`] = `"<dim>1234567890/1234567890/</><bold>1234.js</>"`;
 
 exports[`trimAndFormatPath() split at the path.sep index 1`] = `"<dim>.../</><bold>1234.js</>"`;

packages/jest-reporters/src/__tests__/utils.test.ts

@@ -152,4 +152,14 @@ describe('printDisplayName', () => {
       ),
     ).toMatchSnapshot();
   });
+
+  it('should correctly print the displayName when given just a string', () => {
+    expect(
+      printDisplayName(
+        makeProjectConfig({
+          displayName: 'hello',
+        }),
+      ),
+    ).toMatchSnapshot();
+  });
 });

packages/jest-reporters/src/utils.ts

@@ -22,6 +22,12 @@ export const printDisplayName = (config: Config.ProjectConfig): string => {
     return '';
   }
 
+  // given just a string, default to white
+  if (typeof displayName === 'string') {
+    return white(` ${displayName} `);
+  }
+
+  // given name and a color
   const {name, color} = displayName;
   const chosenColor = chalk.reset.inverse[color]
     ? chalk.reset.inverse[color]

packages/jest-types/src/Config.ts

@@ -330,7 +330,7 @@ export type ProjectConfig = {
   dependencyExtractor?: string;
   detectLeaks: boolean;
   detectOpenHandles: boolean;
-  displayName?: DisplayName;
+  displayName?: DisplayName | string;
   errorOnDeprecated: boolean;
   extensionsToTreatAsEsm: Array<Path>;
   extraGlobals: Array<keyof NodeJS.Global>;
@@ -344,7 +344,7 @@ export type ProjectConfig = {
   moduleDirectories: Array<string>;
   moduleFileExtensions: Array<string>;
   moduleLoader?: Path;
-  moduleNameMapper: Array<[string, string]>;
+  moduleNameMapper: Record<string, string | Array<string>>;
   modulePathIgnorePatterns: Array<string>;
   modulePaths?: Array<string>;
   name: string;
@@ -428,7 +428,7 @@ export type Argv = Arguments<
     onlyFailures: boolean;
     outputFile: string;
     preset: string | null | undefined;
-    projects: Array<string>;
+    projects: Array<string> | Array<Partial<ProjectConfig>>;
     prettierPath: string | null | undefined;
     resetMocks: boolean;
     resetModules: boolean;

packages/test-utils/src/config.ts

@@ -87,7 +87,7 @@ const DEFAULT_PROJECT_CONFIG: Config.ProjectConfig = {
   moduleDirectories: [],
   moduleFileExtensions: ['js'],
   moduleLoader: '/test_module_loader_path',
-  moduleNameMapper: [],
+  moduleNameMapper: {},
   modulePathIgnorePatterns: [],
   modulePaths: [],
   name: 'test_name',