Source maps for vue2 SFCs using TS are not created/wrongly created for v28

After upgrading to Jest v28 SFCs that are using TypeScript and the Composition-API plugin for Vue2 are producing a weird error:

FAIL  ***/FormDateInput.spec.ts
  ● Test suite failed to run

    No element indexed by 61

      4 | import Vue from 'vue';
      5 |
    > 6 | import FormDateInput from './FormDateInput.vue';
        | ^
      7 |
      8 | const localVue = createLocalVue();
      9 |

      at ArraySet_at [as at] (node_modules/source-map/lib/array-set.js:92:9)
      at BasicSourceMapConsumer.SourceMapConsumer_originalPositionFor [as originalPositionFor] (node_modules/source-map/lib/source-map-consumer.js:626:30)
      at node_modules/@vue/vue2-jest/lib/generate-source-map.js:29:28
          at Array.forEach (<anonymous>)
      at generateSourceMap (node_modules/@vue/vue2-jest/lib/generate-source-map.js:26:38)
      at Object.module.exports [as process] (node_modules/@vue/vue2-jest/lib/process.js:129:15)
      at ScriptTransformer.transformSource (node_modules/@jest/transform/build/ScriptTransformer.js:619:31)
      at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:765:40)
      at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:822:19)
      at Object.<anonymous> (***/FormDateInput.spec.ts:6:1)

It seems to me, that vue2-jest cannot produce source-maps or creates them i a way that is not consumable by the underlying source-map lib.

Relevant packages installed in a node 16 environment with npm 8 are:

• “@vue/vue2-jest”: “^28.0.0”
• “jest”: “^28.1.0”
• “ts-jest”: “^28.0.2”
• “typescript”: “^4.6.3”

I know that these version do not match exactly, but it makes no difference: Even if i downgrade all to exactly v28.0.0 it does not work

The transformers property lists @vue/vue2-jest correctly for transforming vue files, which also worked for vue-jest v27 and jest 27. I have also tried to include the full path in node modules like <rootDir>/node_modules/@vue/vue2-jest, but without success.

  transform: {
    '.*\\.(vue)$': '@vue/vue2-jest',
    '.*\\.(js)$': 'babel-jest',
    '.*\\.(ts)$': 'ts-jest',
  },

Unfortunatly i cannot include a repo link since its proprietary software.

Am i missing something in the way to upgrade to jest v28 or is this a bug?

[truumahn]

I can also confirm that https://github.com/vuejs/vue-jest/pull/486#pullrequestreview-1059587403 solves https://github.com/vuejs/vue-test-utils/issues/1989

[gbenson-ff]

I’m getting similar errors in a project using Vue 3 SFCs and Typescript