Add a test for price checking

src/test/java/com/Acrobot/ChestShop/Tests/PriceCheckerTest.java

@@ -0,0 +1,44 @@
+package com.Acrobot.ChestShop.Tests;
+
+import com.Acrobot.ChestShop.Events.PreShopCreationEvent;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import static com.Acrobot.ChestShop.Listeners.PreShopCreation.PriceChecker.onPreShopCreation;
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertTrue;
+
+/**
+ * Created by Andrzej Pomirski (Acrobot)
+ */
+@RunWith(JUnit4.class)
+public class PriceCheckerTest {
+
+    String[] getPriceString(String prices) {
+        return new String[]{null, null, prices, null};
+    }
+
+    @Test
+    public void testPrice() {
+        PreShopCreationEvent event = new PreShopCreationEvent(null, null, getPriceString("B 1"));
+        onPreShopCreation(event);
+        assertFalse(event.isCancelled());
+
+        event = new PreShopCreationEvent(null, null, getPriceString("S 1"));
+        onPreShopCreation(event);
+        assertFalse(event.isCancelled());
+
+        event = new PreShopCreationEvent(null, null, getPriceString("B 1:S 1"));
+        onPreShopCreation(event);
+        assertFalse(event.isCancelled());
+
+        event = new PreShopCreationEvent(null, null, getPriceString("BS 1"));
+        onPreShopCreation(event);
+        assertTrue(event.isCancelled());
+
+        event = new PreShopCreationEvent(null, null, getPriceString("B 1S0"));
+        onPreShopCreation(event);
+        assertTrue(event.isCancelled());
+    }
+}