Add toBeTruthy

src/Expectation.php

@@ -205,6 +205,16 @@ final class Expectation
         return $this;
     }
 
+    /**
+     * Asserts that the value is truthy.
+     */
+    public function toBeTruthy(): Expectation
+    {
+        Assert::assertTrue((bool) $this->value);
+
+        return $this;
+    }
+
     /**
      * Asserts that the value is false.
      */

tests/Features/Expect/ToBeTruthy.php

@@ -0,0 +1,26 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(true)->toBeTruthy();
+    expect([1])->toBeTruthy();
+    expect('false')->toBeTruthy();
+    expect(1)->toBeTruthy();
+    expect(-1)->toBeTruthy();
+
+    expect(false)->not->toBeTruthy();
+    expect('')->not->toBeTruthy();
+    expect(null)->not->toBeTruthy();
+    expect([])->not->toBeTruthy();
+    expect(0)->not->toBeTruthy();
+    expect('0')->not->toBeTruthy();
+});
+
+test('failures', function () {
+    expect(null)->toBeTruthy();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(1)->not->toBeTruthy();
+})->throws(ExpectationFailedException::class);