Adds expect extend

tests/Expect/extend.php

@@ -0,0 +1,29 @@
+<?php
+
+expect()->extend('toBeAMacroExpectation', function () {
+    $this->toBeTrue();
+
+    return $this;
+});
+
+expect()->extend('toBeAMacroExpectationWithArguments', function (bool $value) {
+    $this->toBe($value);
+
+    return $this;
+});
+
+it('macros true is true', function () {
+    expect(true)->toBeAMacroExpectation();
+});
+
+it('macros false is not true', function () {
+    expect(false)->not->toBeAMacroExpectation();
+});
+
+it('macros true is true with argument', function () {
+    expect(true)->toBeAMacroExpectationWithArguments(true);
+});
+
+it('macros false is not true with argument', function () {
+    expect(false)->not->toBeAMacroExpectationWithArguments(true);
+});