fix: Compare Options with getOptionKey instead of label + reduce (#1012)

tests/unit/OptionComparator.spec.js

@@ -0,0 +1,31 @@
+import Select from '../../src/components/Select';
+
+describe('Comparing Options', () => {
+
+  const comparator = Select.methods.optionComparator.bind({
+    getOptionKey: Select.props.getOptionKey.default,
+  });
+
+  it('can compare numbers', () => {
+    expect(comparator(1, 2)).toBeFalsy();
+    expect(comparator(1, 1)).toBeTruthy();
+  });
+
+  it('can compare strings', () => {
+    expect(comparator('one', 'one')).toBeTruthy();
+    expect(comparator('one', 'two')).toBeFalsy();
+  });
+
+  it('can compare objects', () => {
+    //  compare ID keys
+    expect(comparator({label: 'halo', id: 1}, {label: 'halo', id: 2}))
+      .toBeFalsy();
+    //  compare objects
+    expect(comparator({label: 'halo', value: 1}, {label: 'halo', value: 1}))
+      .toBeTruthy();
+    //  compare objects with different orders
+    expect(comparator({value: 1, label: 'halo'}, {label: 'halo', value: 1}))
+      .toBeTruthy();
+  });
+
+});