Angular TypeError:（options.astTransformers | |[]）。贴图不是函数

我使用

"jest": "^26.4.2",
"jest-preset-angular": "^8.3.1",

当我运行命令

npm run test:app

时，它在Angular 8中工作正常，现在我已经将Angular更新为最新版本10。我在每个测试组件上都得到如下错误

测试套件无法运行

TypeError: (options.astTransformers || []).map is not a function

  at ConfigSet.get (node_modules/ts-jest/dist/config/config-set.js:225:64)
  at ConfigSet.tsJest (node_modules/ts-jest/dist/util/memoize.js:43:24)
  at ConfigSet.get (node_modules/ts-jest/dist/config/config-set.js:297:41)
  at ConfigSet.versions (node_modules/ts-jest/dist/util/memoize.js:43:24)
  at ConfigSet.get (node_modules/ts-jest/dist/config/config-set.js:588:32)
  at ConfigSet.jsonValue (node_modules/ts-jest/dist/util/memoize.js:43:24)
  at ConfigSet.get [as cacheKey] (node_modules/ts-jest/dist/config/config-set.js:603:25)
  at TsJestTransformer.getCacheKey (node_modules/ts-jest/dist/ts-jest-transformer.js:126:36)

这是面临错误的组件之一

describe('DateSelectionComponent', () => {
      let component: DateSelectionComponent;
      let fixture: ComponentFixture<DateSelectionComponent>;
    
      beforeEach(async(() => {
        TestBed.configureTestingModule({
          declarations: [DateSelectionComponent, SafePipe],
          imports: [
            SharedModule,
            NgReduxTestingModule,
            RouterTestingModule.withRoutes([])
          ],
          providers: [
            {
              provide: PageAPIActions, useValue: { setPageState() { } }
            }
          ]
        })
          .compileComponents();
      }));
    
      beforeEach(() => {
        fixture = TestBed.createComponent(DateSelectionComponent);
        component = fixture.componentInstance;
        Object.defineProperties(component, {
          page$: {
            value: of('value'),
            writable: true
          },
          page: {
            value: { destination: 'value' },
            writable: true
          },
          startDate: {
            value: new NgbDate(2019, 2, 27),
            writable: true
          },
          minDate: {
            value: new NgbDate(2019, 2, 27),
            writable: true
          }
        });
        fixture.detectChanges();
      });
    
      it('should create', () => {
        expect(component).toBeTruthy();
      });
    
      it('Should Match Snapshot', async () => {
        (expect(fixture) as any).toMatchSnapshot();
      });
    });

description（'DateSelectionComponent'，（）=>{
let组件：DateSelectionComponent；
let夹具：组件夹具；
beforeach（异步（（）=>{
TestBed.configureTestingModule({
声明：[DateSelectionComponent，SafePipe]，
进口：[
共享模块，
NgReduxTestingModule，
RouterTestingModule.withRoutes（[]）
],
供应商：[
{
提供：PageApiations，useValue:{setPageState（）{}
}
]
})
.compileComponents（）；
}));
在每个之前（（）=>{
fixture=TestBed.createComponent（DateSelectionComponent）；
组件=fixture.componentInstance；
对象。定义属性（组件{
第页$：{
值：of（'value'），
可写：对
},
第页：{
值：{destination:'value'}，
可写：对
},
起始日期：{
价值：新NGB日期（2019年2月27日），
可写：对
},
minDate：{
价值：新NGB日期（2019年2月27日），
可写：对
}
});
fixture.detectChanges（）；
});
它（'应该创建'，（）=>{
expect（component.toBeTruthy（）；
});
它（'应该匹配快照'，异步（）=>{
（除（固定装置）外）toMatchSnapshot（）；
});
});

Jest配置

Jest.app配置

const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/src'],
    modulePaths: ['<rootDir>/dist'],
    modulePathIgnorePatterns: ['<rootDir>/src/app/shared'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1",
        'projects/pts-ngx/core/(.*)$': '<rootDir>/projects/pts-ngx/core/$1'
    }
};

module.exports = {
    preset: 'jest-preset-angular',
    setupFilesAfterEnv: ['<rootDir>/setupJest.ts'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1"
    }
};

// jest.lib.config.js
const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/projects'],
};

constbaseconfig=require（'./jest.base.config'）；
module.exports={
…baseConfig，
根：['/src']，
模块路径：['/dist']，
modulePathIgnorePatterns:['/src/app/shared']，
模块映射：{
“^@pts ngx/core”：“/dist/pts ngx/core”，
“^@pts ngx/core/（.*）$”：“/dist/pts ngx/core/$1”，
“projects/pts ngx/core/（.*）$”：“/projects/pts ngx/core/$1”
}
};

Jest基本配置

const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/src'],
    modulePaths: ['<rootDir>/dist'],
    modulePathIgnorePatterns: ['<rootDir>/src/app/shared'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1",
        'projects/pts-ngx/core/(.*)$': '<rootDir>/projects/pts-ngx/core/$1'
    }
};

module.exports = {
    preset: 'jest-preset-angular',
    setupFilesAfterEnv: ['<rootDir>/setupJest.ts'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1"
    }
};

// jest.lib.config.js
const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/projects'],
};

module.exports={
预设：“开玩笑预设角度”，
setupFilesAfterEnv:['/setupJest.ts']，
模块映射：{
“^@pts ngx/core”：“/dist/pts ngx/core”，
“^@pts ngx/core/（.*）$”：“/dist/pts ngx/core/$1”
}
};

Jest.library配置

const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/src'],
    modulePaths: ['<rootDir>/dist'],
    modulePathIgnorePatterns: ['<rootDir>/src/app/shared'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1",
        'projects/pts-ngx/core/(.*)$': '<rootDir>/projects/pts-ngx/core/$1'
    }
};

module.exports = {
    preset: 'jest-preset-angular',
    setupFilesAfterEnv: ['<rootDir>/setupJest.ts'],
    moduleNameMapper: {
        "^@pts-ngx/core": "<rootDir>/dist/pts-ngx/core",
        "^@pts-ngx/core/(.*)$": "<rootDir>/dist/pts-ngx/core/$1"
    }
};

// jest.lib.config.js
const baseConfig = require('./jest.base.config');

module.exports = {
    ...baseConfig,
    roots: ['<rootDir>/projects'],
};

//jest.lib.config.js
const baseConfig=require（'./jest.base.config'）；
module.exports={
…baseConfig，
根：['/projects']，
};

尝试将“ts jest”更新到最新版本（26.3.0）

这有助于我

卸载jest预设值

重新安装jest预设角度

清除jest缓存

重试

要清除angular.json文件上的缓存，请添加以下脚本

"scripts": {
"clear_jest": "jest --clearCache"
  }

然后运行

npm运行clear\u jest

如果上述选项不起作用，请尝试通过

npm安装--dev ts jest

---

出现此错误的主要原因是package.json.lock文件中的

ts jest

版本错误。

运行npm安装--dev ts jest解决了我的问题