From e4ff0c0e19e5941e7e7db1da9b5c29e01d58ab58 Mon Sep 17 00:00:00 2001
From: Ahn <anhpnnd@gmail.com>
Date: Fri, 12 Feb 2021 12:13:19 +0100
Subject: [PATCH] feat(presets): add type definition for `presets` entry point
 (#801)

---
 presets/index.d.ts                            |  7 ++
 presets/index.js                              | 38 +++++-----
 .../__snapshots__/ng-jest-config.spec.ts.snap |  1 +
 .../__snapshots__/presets.spec.ts.snap        | 73 +++++++++++++++++++
 src/__tests__/presets.spec.ts                 | 11 +++
 tsconfig.spec.json                            |  4 +
 6 files changed, 113 insertions(+), 21 deletions(-)
 create mode 100644 presets/index.d.ts
 create mode 100644 src/__tests__/__snapshots__/presets.spec.ts.snap
 create mode 100644 src/__tests__/presets.spec.ts

diff --git a/presets/index.d.ts b/presets/index.d.ts
new file mode 100644
index 0000000000..fbc2c6aaca
--- /dev/null
+++ b/presets/index.d.ts
@@ -0,0 +1,7 @@
+import type { TsJestPresets } from 'ts-jest/dist/types';
+
+declare const _default: {
+  defaults: TsJestPresets;
+  defaultsESM: TsJestPresets;
+};
+export = _default;
diff --git a/presets/index.js b/presets/index.js
index e645586955..5b01cb2e52 100644
--- a/presets/index.js
+++ b/presets/index.js
@@ -22,26 +22,22 @@ const basePreset = {
 }
 
 module.exports = {
-  get defaults() {
-    return basePreset;
-  },
-  get defaultsESM() {
-    return {
-      ...basePreset,
-      extensionsToTreatAsEsm: ['.ts'],
-      globals: {
-        'ts-jest': {
-          ...basePreset.globals['ts-jest'],
-          useESM: true,
-        },
-      },
-      moduleNameMapper: {
-        ...basePreset.moduleNameMapper,
-        'tslib': '<rootDir>/node_modules/tslib/tslib.es6.js',
+  defaults: basePreset,
+  defaultsESM: {
+    ...basePreset,
+    extensionsToTreatAsEsm: ['.ts'],
+    globals: {
+      'ts-jest': {
+        ...basePreset.globals['ts-jest'],
+        useESM: true,
       },
-      transformIgnorePatterns: [
-        'node_modules/(?!tslib)',
-      ],
-    }
-  },
+    },
+    moduleNameMapper: {
+      ...basePreset.moduleNameMapper,
+      'tslib': '<rootDir>/node_modules/tslib/tslib.es6.js',
+    },
+    transformIgnorePatterns: [
+      'node_modules/(?!tslib)',
+    ],
+  }
 }
diff --git a/src/__tests__/__snapshots__/ng-jest-config.spec.ts.snap b/src/__tests__/__snapshots__/ng-jest-config.spec.ts.snap
index 2b68a82d95..a43aef74b0 100644
--- a/src/__tests__/__snapshots__/ng-jest-config.spec.ts.snap
+++ b/src/__tests__/__snapshots__/ng-jest-config.spec.ts.snap
@@ -2,6 +2,7 @@
 
 exports[`NgJestConfig _resolveTsConfig should return config including Angular compiler config with tsconfig as a string from ts-jest option 1`] = `
 Object {
+  "allowSyntheticDefaultImports": true,
   "annotationsAs": "decorators",
   "declaration": false,
   "enableIvy": true,
diff --git a/src/__tests__/__snapshots__/presets.spec.ts.snap b/src/__tests__/__snapshots__/presets.spec.ts.snap
new file mode 100644
index 0000000000..37c4e9e5e7
--- /dev/null
+++ b/src/__tests__/__snapshots__/presets.spec.ts.snap
@@ -0,0 +1,73 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Presets should return the correct ESM preset value: esm-preset 1`] = `
+Object {
+  "extensionsToTreatAsEsm": Array [
+    ".ts",
+  ],
+  "globals": Object {
+    "ts-jest": Object {
+      "stringifyContentPathRegex": "\\\\.html$",
+      "tsconfig": "<rootDir>/tsconfig.spec.json",
+      "useESM": true,
+    },
+  },
+  "moduleFileExtensions": Array [
+    "ts",
+    "html",
+    "js",
+    "json",
+  ],
+  "moduleNameMapper": Object {
+    "^app/(.*)$": "<rootDir>/src/app/$1",
+    "^assets/(.*)$": "<rootDir>/src/assets/$1",
+    "^environments/(.*)$": "<rootDir>/src/environments/$1",
+    "^src/(.*)$": "<rootDir>/src/$1",
+    "tslib": "<rootDir>/node_modules/tslib/tslib.es6.js",
+  },
+  "snapshotSerializers": Array [
+    "jest-preset-angular/build/serializers/html-comment",
+    "jest-preset-angular/build/serializers/ng-snapshot",
+    "jest-preset-angular/build/serializers/no-ng-attributes",
+  ],
+  "testEnvironment": "jsdom",
+  "transform": Object {
+    "^.+\\\\.(ts|js|html)$": "jest-preset-angular",
+  },
+  "transformIgnorePatterns": Array [
+    "node_modules/(?!tslib)",
+  ],
+}
+`;
+
+exports[`Presets should return the correct default preset value: default-preset 1`] = `
+Object {
+  "globals": Object {
+    "ts-jest": Object {
+      "stringifyContentPathRegex": "\\\\.html$",
+      "tsconfig": "<rootDir>/tsconfig.spec.json",
+    },
+  },
+  "moduleFileExtensions": Array [
+    "ts",
+    "html",
+    "js",
+    "json",
+  ],
+  "moduleNameMapper": Object {
+    "^app/(.*)$": "<rootDir>/src/app/$1",
+    "^assets/(.*)$": "<rootDir>/src/assets/$1",
+    "^environments/(.*)$": "<rootDir>/src/environments/$1",
+    "^src/(.*)$": "<rootDir>/src/$1",
+  },
+  "snapshotSerializers": Array [
+    "jest-preset-angular/build/serializers/html-comment",
+    "jest-preset-angular/build/serializers/ng-snapshot",
+    "jest-preset-angular/build/serializers/no-ng-attributes",
+  ],
+  "testEnvironment": "jsdom",
+  "transform": Object {
+    "^.+\\\\.(ts|js|html)$": "jest-preset-angular",
+  },
+}
+`;
diff --git a/src/__tests__/presets.spec.ts b/src/__tests__/presets.spec.ts
new file mode 100644
index 0000000000..546f22c0f1
--- /dev/null
+++ b/src/__tests__/presets.spec.ts
@@ -0,0 +1,11 @@
+import presets from '../../presets';
+
+describe('Presets', () => {
+  test('should return the correct default preset value', () => {
+    expect(presets.defaults).toMatchSnapshot('default-preset');
+  });
+
+  test('should return the correct ESM preset value', () => {
+    expect(presets.defaultsESM).toMatchSnapshot('esm-preset');
+  });
+});
diff --git a/tsconfig.spec.json b/tsconfig.spec.json
index 71cce3ca8a..5b30143ad2 100644
--- a/tsconfig.spec.json
+++ b/tsconfig.spec.json
@@ -1,3 +1,7 @@
 {
   "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true
+  }
 }