Implement some BlocksAPI method

.github/actions/mutation-tests-all-files/action.yml

@@ -19,6 +19,10 @@ runs:
       - name: Setup environment
         uses: ./.github/actions/setup
 
+      - uses: ./.github/actions/build
+        with:
+          package-name: ${{ inputs.package-name }}
+
       - name: Get changed files
         uses: tj-actions/changed-files@v39.0.0
         id: changed-files

.github/actions/mutation-tests-changed-files/action.yml

@@ -22,6 +22,10 @@ runs:
       - name: Setup environment
         uses: ./.github/actions/setup
 
+      - uses: ./.github/actions/build
+        with:
+          package-name: ${{ inputs.package-name }}
+
       - name: Get changed files
         uses: tj-actions/changed-files@v39.0.0
         id: changed-files
@@ -55,7 +59,7 @@ runs:
             ✅ Mutation testing passed for `${{ inputs.working-directory }}`
 
             Report: https://dashboard.stryker-mutator.io/reports/github.com/editor-js/document-model/PR-${{ steps.findPr.outputs.number }}?module=${{ inputs.package-name }}
-            
+
             <details>
               <summary>Mutated files</summary>
               <pre>
@@ -73,7 +77,7 @@ runs:
             ❌ Mutation testing hasn't passed score threshold for `${{ inputs.working-directory }}`
 
             Report: https://dashboard.stryker-mutator.io/reports/github.com/editor-js/document-model/PR-${{ steps.findPr.outputs.number }}?module=${{ inputs.package-name }}
-            
+
             <details>
               <summary>Mutated files</summary>
               <pre>

.github/actions/unit-tests/action.yml

@@ -15,6 +15,10 @@ runs:
         node-version-file: .nvmrc
     - uses: ./.github/actions/setup
 
+    - uses: ./.github/actions/build
+      with:
+        package-name: ${{ inputs.package-name }}
+
     # Find current PR's number
     - uses: jwalton/gh-find-current-pr@v1
       id: findPr
@@ -26,4 +30,4 @@ runs:
         working-directory: ${{ inputs.working-directory }}
         test-script: yarn workspace ${{ inputs.package-name }} test
         package-manager: yarn
-        prnumber: ${{ steps.findPr.outputs.number }}
+        prnumber: ${{ steps.findPr.outputs.number }}

.github/workflows/core.yml

@@ -12,11 +12,43 @@ jobs:
         with:
           package-name: '@editorjs/core'
 
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run unit tests
+        uses: ./.github/actions/unit-tests
+        with:
+          package-name: '@editorjs/core'
+          working-directory: './packages/core'
+
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - name: Build the package
         uses: ./.github/actions/build
         with:
-          package-name: '@editorjs/core'
+          package-name: '@editorjs/core'
+
+  mutation-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run mutation tests for changed files
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: ./.github/actions/mutation-tests-changed-files
+        with:
+          package-name: '@editorjs/core'
+          working-directory: './packages/core'
+          stryker_dashboard_api_key: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
+
+      - name: Run mutation tests for all files
+        if: ${{ github.event_name == 'merge_group' }}
+        uses: ./.github/actions/mutation-tests-all-files
+        with:
+          package-name: '@editorjs/core'
+          working-directory: './packages/core'
+          stryker_dashboard_api_key: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}

packages/core/eslint.config.mjs

@@ -12,23 +12,30 @@ export default [
         project: './tsconfig.json',
         tsconfigRootDir: './',
         sourceType: 'module',
+        tsconfig: './tsconfig.json',
       },
     },
     rules: {
       'n/no-unpublished-import': ['error', {
         allowModules: [
           'eslint-config-codex',
+          '@jest/globals',
         ],
         ignoreTypeImport: true,
       }],
       // @todo: remove when we setup eslint to correctly handle the types
       'n/no-missing-import': 'off',
+      '@typescript-eslint/unbound-method': 'off',
       '@typescript-eslint/no-unsafe-call': 'off',
       '@typescript-eslint/no-unsafe-member-access': 'off',
       '@typescript-eslint/no-unsafe-assignment': 'off',
       '@typescript-eslint/no-unsafe-argument': 'off',
       '@typescript-eslint/no-missing-import': 'off',
       '@typescript-eslint/no-unsafe-return': 'off',
+      'n/no-unsupported-features/node-builtins': ['error', {
+        version: '>=24.0.0',
+        ignores: [],
+      }],
     },
   },
 ];

packages/core/jest.config.ts

@@ -0,0 +1,31 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  testMatch: [ '<rootDir>/src/**/*.spec.ts' ],
+  modulePathIgnorePatterns: [ '<rootDir>/.*/__mocks__' ],
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  transform: {
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+    '^.+\\.jsx?$': [
+      'babel-jest',
+      {
+        presets: [
+          ['@babel/preset-env', { targets: { node: 'current' } }],
+        ],
+      },
+    ],
+  },
+  transformIgnorePatterns: [
+    'node_modules/(?!@editorjs)',
+  ]
+} as JestConfigWithTsJest;

packages/core/package.json

@@ -11,19 +11,37 @@
     "lint": "eslint ./src",
     "lint:ci": "eslint --config ./eslint.config.mjs ./src --max-warnings 0",
     "lint:fix": "yarn lint --fix",
+    "test": "node --experimental-vm-modules $(yarn bin jest)",
+    "test:coverage": "yarn test --coverage=true",
+    "test:mutations": "NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" stryker run",
     "clear": "rm -rf ./dist && rm -rf ./tsconfig.build.tsbuildinfo"
   },
   "devDependencies": {
-    "eslint": "^9.9.1",
-    "eslint-config-codex": "^2.0.2",
+    "@babel/core": "^7.29.0",
+    "@babel/preset-env": "^7.29.2",
+    "@jest/globals": "^29.7.0",
+    "@stryker-mutator/core": "^7.0.2",
+    "@stryker-mutator/jest-runner": "^7.0.2",
+    "@stryker-mutator/typescript-checker": "^7.0.2",
+    "@types/eslint": "^8",
+    "@types/jest": "^29.5.1",
+    "@types/node": "^22.10.2",
+    "babel-jest": "^30.3.0",
+    "eslint": "^9.24.0",
+    "eslint-config-codex": "^2.0.3",
+    "eslint-plugin-import": "^2.29.0",
+    "jest": "^29.7.0",
+    "stryker-cli": "^1.0.2",
+    "ts-jest": "^29.2.5",
+    "ts-node": "^10.9.2",
     "typescript": "^5.5.4"
   },
   "dependencies": {
     "@editorjs/collaboration-manager": "workspace:^",
     "@editorjs/dom": "^1.0.0",
     "@editorjs/dom-adapters": "workspace:^",
     "@editorjs/editorjs": "^2.30.5",
-    "@editorjs/helpers": "^1.0.0",
+    "@editorjs/helpers": "^1.1.0",
     "@editorjs/model": "workspace:^",
     "@editorjs/sdk": "workspace:^",
     "reflect-metadata": "^0.2.2",