Export matcher state from expect

CHANGELOG.md

@@ -68,7 +68,7 @@
 - `[@jest/transform]`: Migrate to TypeScript ([#7918](https://github.com/facebook/jest/pull/7918), [#7945](https://github.com/facebook/jest/pull/7945))
 - `[docs]` Add missing import to docs ([#7928](https://github.com/facebook/jest/pull/7928))
 - `[jest-resolve-dependencies]`: Migrate to TypeScript ([#7922](https://github.com/facebook/jest/pull/7922))
-- `[expect]`: Migrate to TypeScript ([#7919](https://github.com/facebook/jest/pull/7919))
+- `[expect]`: Migrate to TypeScript ([#7919](https://github.com/facebook/jest/pull/7919), [#8028](https://github.com/facebook/jest/pull/8028))
 - `[jest-circus]`: Migrate to TypeScript ([#7916](https://github.com/facebook/jest/pull/7916))
 - `[jest-phabricator]`: Migrate to TypeScript ([#7965](https://github.com/facebook/jest/pull/7965))
 - `[jest-runner]`: Migrate to TypeScript ([#7968](https://github.com/facebook/jest/pull/7968))

packages/expect/src/index.ts

@@ -11,7 +11,7 @@ import {
   AsyncExpectationResult,
   SyncExpectationResult,
   ExpectationResult,
-  MatcherState,
+  MatcherState as JestMatcherState,
   MatchersObject,
   RawMatcherFn,
   ThrowingMatcherFn,
@@ -61,7 +61,7 @@ const createToThrowErrorMatchingSnapshotMatcher = function(
   matcher: RawMatcherFn,
 ) {
   return function(
-    this: MatcherState,
+    this: JestMatcherState,
     received: any,
     testNameOrInlineSnapshot?: string,
   ) {
@@ -241,7 +241,7 @@ const makeThrowingMatcher = (
     let throws = true;
     const utils = {...matcherUtils, iterableEquality, subsetEquality};
 
-    const matcherContext: MatcherState = {
+    const matcherContext: JestMatcherState = {
       // When throws is disabled, the matcher will not throw errors during test
       // execution but instead add them to the global matcher state. If a
       // matcher throws, test execution is normally stopped immediately. The
@@ -407,4 +407,11 @@ expect.getState = getState;
 expect.setState = setState;
 expect.extractExpectedAssertionsErrors = extractExpectedAssertionsErrors;
 
-export = expect as Expect;
+const expectExport = expect as Expect;
+
+// eslint-disable-next-line no-redeclare
+namespace expectExport {
+  export type MatcherState = JestMatcherState;
+}
+
+export = expectExport;

packages/jest-snapshot/package.json

@@ -13,6 +13,7 @@
     "@babel/types": "^7.0.0",
     "@jest/types": "^24.1.0",
     "chalk": "^2.0.1",
+    "expect": "^24.1.0",
     "jest-diff": "^24.0.0",
     "jest-matcher-utils": "^24.0.0",
     "jest-message-util": "^24.0.0",

packages/jest-snapshot/src/index.ts

@@ -6,8 +6,9 @@
  */
 
 import fs from 'fs';
-import {Config, Matchers} from '@jest/types';
+import {Config} from '@jest/types';
 import {FS as HasteFS} from 'jest-haste-map';
+import {MatcherState} from 'expect';
 
 import diff from 'jest-diff';
 import {EXPECTED_COLOR, matcherHint, RECEIVED_COLOR} from 'jest-matcher-utils';
@@ -21,8 +22,7 @@ import SnapshotState from './State';
 import {addSerializer, getSerializers} from './plugins';
 import * as utils from './utils';
 
-// TODO: use MatcherState directly from `expect` once whole project is migrated
-type Context = Matchers.MatcherState & {
+type Context = MatcherState & {
   snapshotState: SnapshotState;
 };
 

packages/jest-snapshot/tsconfig.json

@@ -5,6 +5,7 @@
     "outDir": "build"
   },
   "references": [
+    {"path": "../expect"},
     {"path": "../jest-diff"},
     {"path": "../jest-haste-map"},
     {"path": "../jest-matcher-utils"},

packages/jest-types/src/index.ts

@@ -6,8 +6,7 @@
  */
 
 import * as Config from './Config';
-import * as Matchers from './Matchers';
 import * as TestResult from './TestResult';
 import * as Global from './Global';
 
-export {Config, Matchers, TestResult, Global};
+export {Config, TestResult, Global};