BAEL-2569 add test

spring-boot/src/test/java/com/baeldung/environmentpostprocessor/PriceCalculationEnvironmentPostProcessorLiveTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.environmentpostprocessor;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.environmentpostprocessor.service.PriceCalculationService;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = PriceCalculationApplication.class)
+public class PriceCalculationEnvironmentPostProcessorLiveTest {
+    
+    @Autowired
+    PriceCalculationService pcService;
+    
+    
+    @Test
+    public void WhenSetGrossEnvironmentVariable_ThenTaxApplied() {
+        double total = pcService.productTotalPrice(100, 4);
+        
+        Assert.assertEquals(400.0,total);
+    }
+
+}