add third-party component properties example and update the tests

Author: yavuztas

spring-boot/configuration/src/main/java/io/reflectoring/validation/AppConfiguration.java

@@ -1,8 +1,11 @@
 package io.reflectoring.validation;
 
+import io.reflectoring.validation.thirdparty.ThirdPartyComponentProperties;
+import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.validation.annotation.Validated;
 
 @Configuration
 @EnableConfigurationProperties(AppProperties.class)
@@ -13,4 +16,11 @@ public static ReportEmailAddressValidator configurationPropertiesValidator() {
         return new ReportEmailAddressValidator();
     }
 
+    @Bean
+    @Validated
+    @ConfigurationProperties(prefix = "app.third-party.properties")
+    public ThirdPartyComponentProperties thirdPartyComponentProperties() {
+        return new ThirdPartyComponentProperties();
+    }
+
 }

spring-boot/configuration/src/main/java/io/reflectoring/validation/AppProperties.java

@@ -4,13 +4,13 @@
 import org.springframework.validation.annotation.Validated;
 
 import javax.validation.Valid;
-import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotBlank;
 
 @Validated
 @ConfigurationProperties(prefix = "app.properties")
 class AppProperties {
 
-    @NotEmpty
+    @NotBlank
     private String name;
 
     @Valid

spring-boot/configuration/src/main/java/io/reflectoring/validation/thirdparty/ThirdPartyComponentProperties.java

@@ -0,0 +1,21 @@
+package io.reflectoring.validation.thirdparty;
+
+import javax.validation.constraints.NotBlank;
+
+/**
+ * We assume that this bean comes from another jar file
+ */
+public class ThirdPartyComponentProperties {
+
+    @NotBlank
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+}

spring-boot/configuration/src/main/resources/application-validation.properties

@@ -2,4 +2,6 @@ app.properties.name=Analysis Application
 app.properties.report.send-emails=true
 app.properties.report.type=PLAIN_TEXT
 app.properties.report.interval-in-days=14
-app.properties.report.email-address[email protected]
+app.properties.report.email-address=[email protected]
+# third-party component properties
+app.third-party.properties.name=Third Party!

spring-boot/configuration/src/test/java/io/reflectoring/validation/AppPropertiesInvalidInputTest.java renamed to spring-boot/configuration/src/test/java/io/reflectoring/validation/PropertiesInvalidInputTest.java

@@ -17,7 +17,7 @@
 /**
  * We create Spring Application dynamically to catch and test application context startup exceptions
  */
-class AppPropertiesInvalidInputTest {
+class PropertiesInvalidInputTest {
 
     SpringApplication application;
     Properties properties;
@@ -45,7 +45,7 @@ void whenGivenNameEmpty_thenNotEmptyValidationFails() {
                 .isInstanceOf(ConfigurationPropertiesBindException.class)
                 .hasRootCauseInstanceOf(BindValidationException.class)
                 .hasStackTraceContaining("Field error in object 'app.properties' on field 'name'")
-                .hasStackTraceContaining("[must not be empty]");
+                .hasStackTraceContaining("[must not be blank]");
 
     }
 
@@ -101,4 +101,17 @@ void whenGivenReportEmailAddressDoesNotContainAnalysisappDomain_thenCustomEmailV
 
     }
 
+    @Test
+    void whenGivenThirdPartyComponentNameIsEmpty_thenNotEmptyValidationFails() {
+
+        properties.put("app.third-party.properties.name", "");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("Field error in object 'app.third-party.properties' on field 'name'")
+                .hasStackTraceContaining("[must not be blank]");
+
+    }
+
 }

spring-boot/configuration/src/test/java/io/reflectoring/validation/AppPropertiesValidInputTest.java renamed to spring-boot/configuration/src/test/java/io/reflectoring/validation/PropertiesValidInputTest.java

@@ -1,5 +1,6 @@
 package io.reflectoring.validation;
 
+import io.reflectoring.validation.thirdparty.ThirdPartyComponentProperties;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -11,15 +12,19 @@
         "app.properties.report.send-emails=true",
         "app.properties.report.type=PLAIN_TEXT",
         "app.properties.report.interval-in-days=14",
-        "[email protected]"
-}, classes = {AppConfiguration.class, AppProperties.class, ReportProperties.class})
-class AppPropertiesValidInputTest {
+        "[email protected]",
+        "app.third-party.properties.name=Third Party!"
+}, classes = {AppConfiguration.class})
+class PropertiesValidInputTest {
 
     @Autowired
     AppProperties appProperties;
 
+    @Autowired
+    ThirdPartyComponentProperties thirdPartyComponentProperties;
+
     @Test
-    void propertiesAreLoaded() {
+    void appPropertiesAreLoaded() {
         assertThat(appProperties).isNotNull();
         assertThat(appProperties.getName()).isEqualTo("My Test App");
         assertThat(appProperties.getReport()).isNotNull();
@@ -29,4 +34,10 @@ void propertiesAreLoaded() {
         assertThat(appProperties.getReport().getEmailAddress()).isEqualTo("[email protected]");
     }
 
+    @Test
+    void thirdPartyComponentPropertiesAreLoaded() {
+        assertThat(thirdPartyComponentProperties).isNotNull();
+        assertThat(thirdPartyComponentProperties.getName()).isEqualTo("Third Party!");
+    }
+
 }