Added BillStateTest

Author: SilverFire

tests/unit/bill/BillStateTest.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace hiqdev\php\billing\tests\unit\bill;
+
+use hiqdev\php\billing\bill\BillState;
+use PHPUnit\Framework\TestCase;
+
+class BillStateTest extends TestCase
+{
+    public function testGetName()
+    {
+        $billState = BillState::new();
+        $this->assertEquals(BillState::STATE_NEW, $billState->getName());
+
+        $billState = BillState::finished();
+        $this->assertEquals(BillState::STATE_FINISHED, $billState->getName());
+    }
+
+    public function testIsNew()
+    {
+        $billState = BillState::new();
+        $this->assertTrue($billState->isNew());
+        $this->assertFalse($billState->isFinished());
+
+        $billState = BillState::finished();
+        $this->assertFalse($billState->isNew());
+    }
+
+    public function testIsFinished()
+    {
+        $billState = BillState::finished();
+        $this->assertTrue($billState->isFinished());
+        $this->assertFalse($billState->isNew());
+
+        $billState = BillState::new();
+        $this->assertFalse($billState->isFinished());
+    }
+
+    public function testNew()
+    {
+        $billState = BillState::new();
+        $this->assertInstanceOf(BillState::class, $billState);
+        $this->assertEquals(BillState::STATE_NEW, $billState->getName());
+    }
+
+    public function testFinished()
+    {
+        $billState = BillState::finished();
+        $this->assertInstanceOf(BillState::class, $billState);
+        $this->assertEquals(BillState::STATE_FINISHED, $billState->getName());
+    }
+
+    public function testFromString()
+    {
+        $billState = BillState::fromString(BillState::STATE_NEW);
+        $this->assertEquals(BillState::STATE_NEW, $billState->getName());
+
+        $billState = BillState::fromString(BillState::STATE_FINISHED);
+        $this->assertEquals(BillState::STATE_FINISHED, $billState->getName());
+    }
+
+    public function testFromStringWithInvalidState()
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage("wrong bill state 'invalid'");
+
+        BillState::fromString('invalid');
+    }
+
+    /**
+     * Helper method to access protected property
+     */
+    private function getStateProperty(BillState $billState)
+    {
+        $reflection = new \ReflectionClass($billState);
+        $property = $reflection->getProperty('state');
+        $property->setAccessible(true);
+
+        return $property->getValue($billState);
+    }
+}