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vendor/phpunit/php-code-coverage/tests/_files/BankAccountTest.php

@@ -0,0 +1,66 @@
+<?php
+use PHPUnit\Framework\TestCase;
+
+class BankAccountTest extends TestCase
+{
+    protected $ba;
+
+    protected function setUp(): void
+    {
+        $this->ba = new BankAccount;
+    }
+
+    /**
+     * @covers BankAccount::getBalance
+     */
+    public function testBalanceIsInitiallyZero()
+    {
+        $this->assertEquals(0, $this->ba->getBalance());
+    }
+
+    /**
+     * @covers BankAccount::withdrawMoney
+     */
+    public function testBalanceCannotBecomeNegative()
+    {
+        try {
+            $this->ba->withdrawMoney(1);
+        } catch (RuntimeException $e) {
+            $this->assertEquals(0, $this->ba->getBalance());
+
+            return;
+        }
+
+        $this->fail();
+    }
+
+    /**
+     * @covers BankAccount::depositMoney
+     */
+    public function testBalanceCannotBecomeNegative2()
+    {
+        try {
+            $this->ba->depositMoney(-1);
+        } catch (RuntimeException $e) {
+            $this->assertEquals(0, $this->ba->getBalance());
+
+            return;
+        }
+
+        $this->fail();
+    }
+
+    /**
+     * @covers BankAccount::getBalance
+     * @covers BankAccount::depositMoney
+     * @covers BankAccount::withdrawMoney
+     */
+    public function testDepositWithdrawMoney()
+    {
+        $this->assertEquals(0, $this->ba->getBalance());
+        $this->ba->depositMoney(1);
+        $this->assertEquals(1, $this->ba->getBalance());
+        $this->ba->withdrawMoney(1);
+        $this->assertEquals(0, $this->ba->getBalance());
+    }
+}