break out expectMatchingValues into another file

Author: yaacovCR

src/__testUtils__/__tests__/expectMatchingValues-test.ts

@@ -0,0 +1,19 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import { expectEqualPromisesOrValues } from '../expectEqualPromisesOrValues';
+
+describe('expectMatchingValues', () => {
+  it('throws when given unequal values', () => {
+    expect(() => expectEqualPromisesOrValues([{}, {}, { test: 'test' }])).throw(
+      "expected { test: 'test' } to deeply equal {}",
+    );
+  });
+
+  it('does not throw when given equal values', () => {
+    const testValue = { test: 'test' };
+    expect(() =>
+      expectEqualPromisesOrValues([testValue, testValue, testValue]),
+    ).not.to.throw();
+  });
+});

src/__testUtils__/expectEqualPromisesOrValues.ts

@@ -3,7 +3,7 @@ import { assert } from 'chai';
 import { isPromise } from '../jsutils/isPromise';
 import type { PromiseOrValue } from '../jsutils/PromiseOrValue';
 
-import { expectJSON } from './expectJSON';
+import { expectMatchingValues } from './expectMatchingValues';
 
 export function expectEqualPromisesOrValues<T>(
   items: ReadonlyArray<PromiseOrValue<T>>,
@@ -21,11 +21,3 @@ export function expectEqualPromisesOrValues<T>(
 
   assert(false, 'Received an invalid mixture of promises and values.');
 }
-
-function expectMatchingValues<T>(values: ReadonlyArray<T>): T {
-  const remainingValues = values.slice(1);
-  for (const value of remainingValues) {
-    expectJSON(value).toDeepEqual(values[0]);
-  }
-  return values[0];
-}

src/__testUtils__/expectMatchingValues.ts

@@ -0,0 +1,9 @@
+import { expectJSON } from './expectJSON';
+
+export function expectMatchingValues<T>(values: ReadonlyArray<T>): T {
+  const remainingValues = values.slice(1);
+  for (const value of remainingValues) {
+    expectJSON(value).toDeepEqual(values[0]);
+  }
+  return values[0];
+}