Add PHP version of kata

php/tests/StatementPrinterTest.php

@@ -0,0 +1,61 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use ApprovalTests\Approvals;
+
+use Theatrical\StatementPrinter;
+use Theatrical\Play;
+use Theatrical\Performance;
+use Theatrical\Invoice;
+
+final class StatementPrinterTest extends TestCase
+{
+    public function testListOfPlayIsCorrect() : void 
+    {
+        $plays = [
+            "hamlet" => new Play("Hamlet", "tragedy"),
+            "as-like" => new Play("As You Like It", "comedy"),
+            "othello" => new Play("Othello", "tragedy")
+        ];
+
+        Approvals::approveList($plays);    
+    }
+
+    public function testCanPrintInvoice() : void 
+    {
+        $plays = [
+            "hamlet" => new Play("Hamlet", "tragedy"),
+            "as-like" => new Play("As You Like It", "comedy"),
+            "othello" => new Play("Othello", "tragedy")
+        ];
+
+        $performances = [
+            new Performance("hamlet", 55),
+            new Performance("as-like", 35),
+            new Performance("othello", 40)
+        ];
+        $invoice = new Invoice("BigCo", $performances);
+        $statementPrinter = new StatementPrinter();
+        $result = $statementPrinter->print($invoice, $plays);
+
+        Approvals::approveString($result);  
+    }
+
+    public function testNewPlayTypes() : void 
+    {
+        $plays = [
+            "henry-v" => new Play("Henry V", "history"),
+            "as-like" => new Play("As You Like It", "comedy"),
+        ];
+
+        $performances = [
+            new Performance("henry-v", 53),
+            new Performance("as-like", 55)
+        ];
+
+        $invoice = new Invoice("BigCo", $performances);
+        $statementPrinter = new StatementPrinter();
+        $this->expectException(\Error::class);
+        $statementPrinter->print($invoice, $plays);
+    }
+}