chore: introduce FullProjectInternal (#13301)

This is similar to FullConfigInternal to put private stuff on.

packages/playwright-test/src/loader.ts

@@ -15,7 +15,7 @@
  */
 
 import { installTransform, setCurrentlyLoadingTestFile } from './transform';
-import type { Config, FullProject, Project, ReporterDescription, PreserveOutput } from './types';
+import type { Config, Project, ReporterDescription, PreserveOutput, FullProjectInternal } from './types';
 import type { FullConfigInternal } from './types';
 import { getPackageJsonPath, mergeObjects, errorWithFile } from './util';
 import { setCurrentlyLoadingFileSuite } from './globals';
@@ -219,7 +219,7 @@ export class Loader {
     const snapshotDir = takeFirst(this._configOverrides.snapshotDir, projectConfig.snapshotDir, config.snapshotDir, testDir);
     const name = takeFirst(this._configOverrides.name, projectConfig.name, config.name, '');
     const screenshotsDir = takeFirst(this._configOverrides.screenshotsDir, projectConfig.screenshotsDir, config.screenshotsDir, path.join(testDir, '__screenshots__', process.platform, name));
-    const fullProject: FullProject = {
+    const fullProject: FullProjectInternal = {
       fullyParallel: takeFirst(this._configOverrides.fullyParallel, projectConfig.fullyParallel, config.fullyParallel, undefined),
       expect: takeFirst(this._configOverrides.expect, projectConfig.expect, config.expect, undefined),
       grep: takeFirst(this._configOverrides.grep, projectConfig.grep, config.grep, baseFullConfig.grep),

packages/playwright-test/src/project.ts

@@ -14,19 +14,19 @@
  * limitations under the License.
  */
 
-import type { FullProject, Fixtures, FixturesWithLocation } from './types';
+import type { Fixtures, FixturesWithLocation, FullProjectInternal } from './types';
 import { Suite, TestCase } from './test';
 import { FixturePool, isFixtureOption } from './fixtures';
 import { TestTypeImpl } from './testType';
 import { calculateSha1 } from 'playwright-core/lib/utils/utils';
 
 export class ProjectImpl {
-  config: FullProject;
+  config: FullProjectInternal;
   private index: number;
   private testTypePools = new Map<TestTypeImpl, FixturePool>();
   private testPools = new Map<TestCase, FixturePool>();
 
-  constructor(project: FullProject, index: number) {
+  constructor(project: FullProjectInternal, index: number) {
     this.config = project;
     this.index = index;
   }

packages/playwright-test/src/test.ts

@@ -17,8 +17,7 @@
 import type { FixturePool } from './fixtures';
 import * as reporterTypes from '../types/testReporter';
 import type { TestTypeImpl } from './testType';
-import { Annotation, FixturesWithLocation, Location } from './types';
-import { FullProject } from './types';
+import { Annotation, FixturesWithLocation, FullProject, FullProjectInternal, Location } from './types';
 
 class Base {
   title: string;
@@ -51,7 +50,7 @@ export class Suite extends Base implements reporterTypes.Suite {
   _annotations: Annotation[] = [];
   _modifiers: Modifier[] = [];
   _parallelMode: 'default' | 'serial' | 'parallel' = 'default';
-  _projectConfig: FullProject | undefined;
+  _projectConfig: FullProjectInternal | undefined;
   _loadError?: reporterTypes.TestError;
 
   _addTest(test: TestCase) {

packages/playwright-test/src/types.ts

@@ -16,7 +16,7 @@
 
 import type { Fixtures, TestError } from '../types/test';
 import type { Location } from '../types/testReporter';
-import type { FullConfig as FullConfigPublic } from './types';
+import type { FullConfig as FullConfigPublic, FullProject as FullProjectPublic } from './types';
 export * from '../types/test';
 export type { Location } from '../types/testReporter';
 
@@ -43,4 +43,14 @@ export interface FullConfigInternal extends FullConfigPublic {
   _configDir: string;
   _testGroupsCount: number;
   _attachments: { name: string, path?: string, body?: Buffer, contentType: string }[];
+
+  // Overrides the public field.
+  projects: FullProjectInternal[];
+}
+
+/**
+ * FullProjectInternal allows the plumbing of configuration details throughout the Test Runner without
+ * increasing the surface area of the public API type called FullProject.
+ */
+export interface FullProjectInternal extends FullProjectPublic {
 }