```typescript
import { Test } from '@servicenow/sdk/core'
import '@servicenow/sdk-core/global'
Test({
  $id: Now.ID['Assessment_ATFUser_Test'],
  name: 'Assessment ATF User Test',
  description: 'Create and impersonate a user, perform actions on Assessment Metric Type form, and verify access.',
  active: true,
  failOnServerError: true
}, (atf) => {
  const createdUser = atf.server.createUser({
    $id: Now.ID['0001'],
    fieldValues: { 'user_name': 'assessment.atfuser' },
    groups: [],
    roles: [
      '282bf1fac6112285017366cb5f867469',
      '3b008fafef1110002d4274341b22564b'
    ],
    impersonate: true,
    firstName: 'Assessment',
    lastName: 'ATFUser'
  })

  atf.form.openNewForm({
    $id: Now.ID['0002'],
    table: 'asmt_metric_type',
    formUI: 'standard_ui',
    view: ''
  })

  const templateCategoryRecord = atf.server.recordInsert({
    $id: Now.ID['0003'],
    table: 'asmt_m2m_category_user',
    fieldValues: {
      'user': createdUser.user,
      'category': ''
    },
    assertType: 'record_successfully_inserted',
    enforceSecurity: false
  })

  const scaleCategoryRecord = atf.server.recordInsert({
    $id: Now.ID['0004'],
    table: 'asmt_m2m_category_user',
    fieldValues: {
      'user': createdUser.user,
      'category': ''
    },
    assertType: 'record_successfully_inserted',
    enforceSecurity: false
  })

  atf.server.recordUpdate({
    $id: Now.ID['0005'],
    table: 'incident',
    fieldValues: { 'caller_id': createdUser.user },
    recordId: '',
    assertType: 'record_successfully_updated',
    enforceSecurity: false
  })

  atf.server.recordUpdate({
    $id: Now.ID['0006'],
    table: 'incident',
    fieldValues: { 'caller_id': createdUser.user },
    recordId: '',
    assertType: 'record_successfully_updated',
    enforceSecurity: false
  })

  atf.server.recordUpdate({
    $id: Now.ID['0007'],
    table: 'incident',
    fieldValues: { 'caller_id': createdUser.user },
    recordId: '',
    assertType: 'record_successfully_updated',
    enforceSecurity: false
  })

  atf.form.openExistingRecord({
    $id: Now.ID['0008'],
    table: 'asmt_metric_type',
    recordId: templateCategoryRecord.recordId,
    formUI: 'standard_ui',
    view: '',
    selectedTabIndex: 0
  })

  atf.form.clickUIAction({
    $id: Now.ID['0009'],
    table: 'asmt_metric_type',
    formUI: 'standard_ui',
    actionType: 'ui_action',
    uiAction: '22765a71d7810100fceaa6859e610307',
    declarativeAction: '',
    assertType: 'form_submitted_to_server'
  })

  atf.form.clickUIAction({
    $id: Now.ID['0010'],
    table: 'asmt_metric_type',
    formUI: 'standard_ui',
    actionType: 'ui_action',
    uiAction: '968c9e6b873223004caf66d107cb0b39',
    declarativeAction: '',
    assertType: 'form_submitted_to_server'
  })

  atf.server.impersonate({
    $id: Now.ID['0011'],
    user: createdUser.user
  })

  atf.server.log({
    $id: Now.ID['0012'],
    log: `User ${createdUser.user} impersonated and navigating to My Assessments & Surveys`
  })

  // Additional steps to navigate to 'My Assessments & Surveys' module in 'Self-Service' application
})
```