diff --git a/packages/json-schema/src/__tests__/transformer.spec.ts b/packages/json-schema/src/__tests__/transformer.spec.ts
index 61c619da46a..9a288430c81 100644
--- a/packages/json-schema/src/__tests__/transformer.spec.ts
+++ b/packages/json-schema/src/__tests__/transformer.spec.ts
@@ -1,11 +1,365 @@
 import { Schema } from '../schema'
+import { createForm } from '@formily/core'
+import { ISchema, ISchemaTransformerOptions } from '../types'
+import { isObservable } from '@formily/reactive'
 
-test('transform field props', () => {
-  const schema = new Schema({
-    name: 'aaa',
-    type: 'string',
+const getFormAndFields = (
+  field1SchemaProps: Omit<ISchema, 'name'> = {},
+  field2SchemaProps: Omit<ISchema, 'name'> = {},
+  options: ISchemaTransformerOptions = {}
+) => {
+  const filed1Schema = new Schema({
+    name: 'field1',
+    ...field1SchemaProps,
+  }).toFieldProps(options)
+
+  const filed2Schema = new Schema({
+    name: 'field2',
+    ...field2SchemaProps,
+  }).toFieldProps(options)
+
+  const form = createForm()
+  const field1 = form.createField(filed1Schema)
+  const field2 = form.createField(filed2Schema)
+
+  return {
+    form,
+    field1,
+    field2,
+  }
+}
+
+test('baseReaction', () => {
+  const { field1, field2 } = getFormAndFields(
+    {
+      title: 'field1Title',
+    },
+    {
+      title: 'field2Title',
+    }
+  )
+
+  expect(field1.title).toBe('field1Title')
+  expect(field2.title).toBe('field2Title')
+})
+
+test('baseReaction with scopes', () => {
+  const scopeTitle = 'fieldTitle'
+  const scopeDescription = 'fieldDescription'
+
+  const { field1, field2 } = getFormAndFields(
+    {
+      title: '{{scopeTitle}}',
+    },
+    {
+      description: '{{scopeDescription}}',
+    },
+    {
+      scope: {
+        scopeTitle,
+        scopeDescription,
+      },
+    }
+  )
+
+  // expect(fn).toBeCalledTimes(1)
+  expect(field1.title).toBe(scopeTitle)
+  expect(field2.description).toBe(scopeDescription)
+})
+
+test('userReactions with target(state)', () => {
+  const field2Title = 'field2Title'
+  const { field2 } = getFormAndFields({
+    'x-reactions': {
+      target: 'field2',
+      fulfill: {
+        state: {
+          title: field2Title,
+        },
+      },
+    },
+  })
+
+  expect(field2.title).toBe(field2Title)
+})
+
+test('userReactions with target(schema)', () => {
+  const field2Data = 'fieldData'
+  const { field2 } = getFormAndFields({
+    'x-reactions': {
+      target: 'field2',
+      fulfill: {
+        schema: {
+          'x-data': field2Data,
+        },
+      },
+    },
+  })
+
+  expect(field2.data).toBe(field2Data)
+})
+
+test('userReactions with target(runner)', () => {
+  const mockFn = jest.fn()
+  const field2Title = 'field2Title'
+  const { field2 } = getFormAndFields(
+    {
+      'x-reactions': {
+        target: 'field2',
+        fulfill: {
+          run: `$target.title='${field2Title}';fn()`,
+        },
+      },
+    },
+    {},
+    {
+      scope: {
+        fn: mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).toBeCalledTimes(1)
+  expect(field2.title).toBe(field2Title)
+})
+
+test('userReactions without target(state)', () => {
+  const field1Title = 'field1Title'
+  const { field1 } = getFormAndFields({
+    'x-reactions': {
+      fulfill: {
+        state: {
+          title: field1Title,
+        },
+      },
+    },
+  })
+
+  expect(field1.title).toBe(field1Title)
+})
+
+test('userReactions without target(schema)', () => {
+  const field1Data = 'fieldData'
+  const { field1 } = getFormAndFields({
+    'x-reactions': {
+      fulfill: {
+        schema: {
+          'x-data': field1Data,
+        },
+      },
+    },
+  })
+
+  expect(field1.data).toBe(field1Data)
+})
+
+test('userReactions without target(runner)', () => {
+  const mockFn = jest.fn()
+  const { field1 } = getFormAndFields(
+    {
+      'x-reactions': {
+        fulfill: {
+          run: `$self.__target__=$target;fn()`,
+        },
+      },
+    },
+    {},
+    {
+      scope: {
+        fn: mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).toBeCalledTimes(1)
+  expect((field1 as any).__target__).toBe(null)
+})
+
+test('userReactions with condition', () => {
+  const mockFn = jest.fn()
+  const { field1 } = getFormAndFields(
+    {
+      'x-value': true,
+      'x-reactions': {
+        when: '$self.value===true',
+        fulfill: {
+          run: 'mockFn($self.value)',
+        },
+        otherwise: {
+          run: 'mockFn($self.vlaue)',
+        },
+      },
+    },
+    {},
+    {
+      scope: {
+        mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).nthCalledWith(1, true)
+
+  field1.value = false
+
+  expect(mockFn).nthCalledWith(2, false)
+})
+
+test('userReactions with condition(wrong type)', () => {
+  const field1Value = 'field1Value'
+  const mockFn = jest.fn()
+  getFormAndFields(
+    {
+      'x-value': field1Value,
+      'x-reactions': {
+        dependencies: 'value',
+        fulfill: {
+          run: 'mockFn($deps, $dependencies)',
+        },
+      },
+    },
+    {},
+    {
+      scope: {
+        mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).nthCalledWith(1, [], [])
+})
+
+test('userReactions with condition(array)', () => {
+  const field1Value = 'field1Value'
+  const field2Value = 'field2Value'
+  const field1Title = 'field1Title'
+  const field1Description = 'field1Description'
+  const mockFn = jest.fn()
+
+  getFormAndFields(
+    {
+      title: field1Title,
+      description: field1Description,
+      'x-value': field1Value,
+    },
+    {
+      'x-value': field2Value,
+      'x-reactions': {
+        dependencies: [
+          'field2',
+          {
+            name: 1,
+            source: 'field1',
+          },
+          {
+            name: 2,
+            source: 'field1#title',
+          },
+          {
+            name: 3,
+            source: 'field1',
+            property: 'description',
+          },
+        ],
+        fulfill: {
+          run: `mockFn($deps)`,
+        },
+      },
+    },
+    {
+      scope: {
+        mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).nthCalledWith(1, [
+    field2Value,
+    field1Value,
+    field1Title,
+    field1Description,
+  ])
+})
+
+test('userReactions with condition(object)', () => {
+  const field2Value = 'field2Value'
+  const field1Title = 'field1Title'
+  const mockFn = jest.fn()
+
+  getFormAndFields(
+    {
+      title: field1Title,
+    },
+    {
+      'x-value': field2Value,
+      'x-reactions': {
+        dependencies: {
+          key1: 'field1#title',
+          key2: 'field2',
+        },
+        fulfill: {
+          run: `mockFn($deps)`,
+        },
+      },
+    },
+    {
+      scope: {
+        mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).nthCalledWith(1, {
+    key1: field1Title,
+    key2: field2Value,
+  })
+})
+
+test('userReactions with user-defined effects', () => {
+  const field2Value = 'field2Value'
+  const field1Title = 'field1Title'
+  const mockFn = jest.fn()
+
+  const { field2 } = getFormAndFields(
+    {
+      title: field1Title,
+      'x-reactions': {
+        target: 'field2',
+        fulfill: {
+          run: `mockFn($target.value)`,
+        },
+        effects: ['onFieldInit'],
+      },
+    },
+    {
+      'x-value': field2Value,
+    },
+    {
+      scope: {
+        mockFn,
+      },
+    }
+  )
+
+  expect(mockFn).toBeCalledTimes(1)
+  expect(mockFn).nthCalledWith(1, field2Value)
+
+  field2.value = field1Title
+  expect(mockFn).toBeCalledTimes(1)
+})
+
+test('userReactions with function type', () => {
+  const componentProps = {
+    prop: 1,
+  }
+  let observable: any = {}
+  const { field1 } = getFormAndFields({
+    'x-reactions': (field, baseScope) => {
+      baseScope.$props(componentProps)
+      observable = baseScope.$observable({})
+    },
   })
-  const props = schema.toFieldProps()
-  expect(props.name).not.toBeUndefined()
-  expect(props.reactions).not.toBeUndefined()
+
+  expect(field1.componentProps).toMatchObject(componentProps)
+  expect(isObservable(observable)).toBe(true)
 })
diff --git a/packages/json-schema/src/transformer.ts b/packages/json-schema/src/transformer.ts
index 01b23fd8836..292c2ce5cc4 100644
--- a/packages/json-schema/src/transformer.ts
+++ b/packages/json-schema/src/transformer.ts
@@ -1,4 +1,3 @@
-/* istanbul ignore file */
 import { untracked, autorun, observable } from '@formily/reactive'
 import {
   isArr,