chore: update type definitions for coverageThreshold (#10893)

packages/jest-types/src/Config.ts

@@ -132,11 +132,7 @@ export type InitialOptions = Partial<{
   coveragePathIgnorePatterns: Array<string>;
   coverageProvider: CoverageProvider;
   coverageReporters: CoverageReporters;
-  coverageThreshold: {
-    global: {
-      [key: string]: number;
-    };
-  };
+  coverageThreshold: CoverageThreshold;
   dependencyExtractor: string;
   detectLeaks: boolean;
   detectOpenHandles: boolean;

test-types/top-level-config.test.ts

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @type ./empty.d.ts
+ */
+
+import {expectAssignable} from 'mlh-tsd';
+import type {Config} from '@jest/types';
+
+expectAssignable<Config.InitialOptions>({
+  coverageThreshold: {
+    './src/api/very-important-module.js': {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+    './src/components/': {
+      branches: 40,
+      statements: 40,
+    },
+    './src/reducers/**/*.js': {
+      statements: 90,
+    },
+    global: {
+      branches: 50,
+      functions: 50,
+      lines: 50,
+      statements: 50,
+    },
+  },
+});