Add several tests (#98)

README.md

@@ -381,6 +381,7 @@ Testing mixed objects not equal...
 Caveats that impact the benchmark (and accuracy of comparison):
 
 - `Map`s, `Promise`s, and `Set`s were excluded from the benchmark entirely because no library other than `deep-eql` fully supported their comparison
+- `fast-deep-equal`, `react-fast-compare` and `nano-equal` throw on objects with `null` as prototype (`Object.create(null)`)
 - `assert.deepStrictEqual` does not support `NaN` or `SameValueZero` equality for dates
 - `deep-eql` does not support `SameValueZero` equality for zero equality (positive and negative zero are not equal)
 - `deep-equal` does not support `NaN` and does not strictly compare object type, or date / regexp values, nor uses `SameValueZero` equality for dates

__tests__/__helpers__/testSuites.js

@@ -215,6 +215,13 @@ export default [
         value1: {},
         value2: {},
       },
+      {
+        deepEqual: true,
+        description: 'empty objects with `null` as prototype are equal',
+        shallowEqual: true,
+        value1: Object.create(null),
+        value2: Object.create(null),
+      },
       {
         deepEqual: true,
         description: 'equal objects (same properties "order")',
@@ -393,6 +400,13 @@ export default [
         },
         value2: [0, 1],
       },
+      {
+        deepEqual: false,
+        description: 'different sparse arrays are not equal',
+        shallowEqual: false,
+        value1: new Array(10),
+        value2: new Array(100),
+      },
     ],
   },
   {
@@ -611,6 +625,20 @@ export default [
   {
     description: 'typed arrays',
     tests: [
+      {
+        deepEqual: true,
+        description: 'two empty arrays of the same class are equal',
+        shallowEqual: true,
+        value1: new Int32Array([]),
+        value2: new Int32Array([]),
+      },
+      {
+        deepEqual: false,
+        description: 'two empty arrays of the different class are not equal',
+        shallowEqual: false,
+        value1: new Int32Array([]),
+        value2: new Int16Array([]),
+      },
       {
         deepEqual: true,
         description: 'equal Float32Array objects',

benchmark/index.js

@@ -88,8 +88,8 @@ for (const name in packages) {
       () => {
         for (const test of testSuite.tests) {
           if (
-            test.description !==
-            'pseudo array and equivalent array are not equal'
+            test.description !== 'pseudo array and equivalent array are not equal'
+            && test.description !== 'empty objects with `null` as prototype are equal'
           ) {
             fn(test.value1, test.value2);
           }