fix test tsconfig and jest config

Author: Lms24

packages/replay/jest.config.ts

@@ -1,12 +1,17 @@
 import type { Config } from '@jest/types';
 import { pathsToModuleNameMapper } from 'ts-jest';
 
-import { compilerOptions } from './tsconfig.json';
+import { compilerOptions } from './tsconfig.test.json';
 
 export default async (): Promise<Config.InitialOptions> => {
   return {
     verbose: true,
     preset: 'ts-jest/presets/js-with-ts', // needed when import worker.js
+    globals: {
+      'ts-jest': {
+        tsconfig: '<rootDir>/tsconfig.test.json',
+      },
+    },
     moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {
       prefix: '<rootDir>/',
     }),

packages/replay/test/unit/util/isSampled.test.ts

@@ -1,7 +1,7 @@
 import { isSampled } from '../../../src/util/isSampled';
 
 // Note Math.random generates a value from 0 (inclusive) to <1 (1 exclusive).
-const cases = [
+const cases: [number, number, boolean][] = [
   [1.0, 0.9999, true],
   [1.0, 0.0, true],
   [1.0, 0.5, true],

packages/replay/tsconfig.test.json

@@ -4,6 +4,15 @@
   "include": ["test/**/*.ts", "jest.config.ts", "jest.setup.ts"],
 
   "compilerOptions": {
-    "types": ["node", "jest"]
+    "paths": {
+      "@test": ["./test"],
+      "@test/*": ["./test/*"]
+    },
+    "baseUrl": ".",
+    "rootDir": ".",
+    "types": ["node", "jest"],
+    "noImplicitAny": false,
+    "noImplicitThis": false,
+    "strictPropertyInitialization": false
   }
 }

packages/replay/worker/src/Compressor.ts

@@ -9,7 +9,7 @@ export class Compressor {
   /**
    * Number of added events
    */
-  public added: number;
+  public added: number = 0;
 
   public constructor() {
     this.init();