loading json props

spring-boot/src/test/java/org/baeldung/properties/JsonPropertiesIntegrationTest.java

@@ -0,0 +1,59 @@
+package org.baeldung.properties;
+
+import java.util.Arrays;
+
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = ConfigPropertiesDemoApplication.class, initializers = JsonPropertyContextInitializer.class)
+public class JsonPropertiesIntegrationTest {
+
+    @Autowired
+    private JsonProperties jsonProperties;
+
+    @Autowired
+    private CustomJsonProperties customJsonProperties;
+
+    @Test
+    public void givenJsonPropertySource_whenPropertySourceFactoryUsed_thenLoadFlatValues() {
+        Assert.assertEquals("mailer@mail.com", jsonProperties.getHost());
+        Assert.assertEquals(9090, jsonProperties.getPort());
+        Assert.assertTrue(jsonProperties.isResend());
+    }
+
+    @Test
+    public void givenJsonPropertySource_whenPropertySourceFactoryUsed_thenLoadListValues() {
+        Assert.assertThat(jsonProperties.getTopics(), Matchers.is(Arrays.asList("spring", "boot")));
+    }
+
+    @Test
+    public void givenJsonPropertySource_whenPropertySourceFactoryUsed_thenNestedValuesLoadedAsMap() {
+        Assert.assertEquals("sender", jsonProperties.getSender()
+            .get("name"));
+        Assert.assertEquals("street", jsonProperties.getSender()
+            .get("address"));
+    }
+
+    @Test
+    public void givenCustomJsonPropertySource_whenLoadedIntoEnvironment_thenFlatValuesPopulated() {
+        Assert.assertEquals("mailer.custom@mail.com", customJsonProperties.getHost());
+        Assert.assertEquals(8081, customJsonProperties.getPort());
+        Assert.assertTrue(customJsonProperties.isResend());
+    }
+
+    @Test
+    public void givenCustomJsonPropertySource_whenLoadedIntoEnvironment_thenValuesLoadedIntoClassObject() {
+        Assert.assertNotNull(customJsonProperties.getSender());
+        Assert.assertEquals("sender.custom", customJsonProperties.getSender()
+            .getName());
+        Assert.assertEquals("street.custom", customJsonProperties.getSender()
+            .getAddress());
+    }
+
+}