configure own template resolver

src/main/java/net/dancier/kikeriki/application/ThymeLeafTemplateConfiguration.java

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+package net.dancier.kikeriki.application;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.spring6.SpringTemplateEngine;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
+import org.thymeleaf.templateresolver.ITemplateResolver;
+
+import java.util.Collections;
+
+@Configuration
+public class ThymeLeafTemplateConfiguration {
+
+ private final static Logger log = LoggerFactory.getLogger(ThymeLeafTemplateConfiguration.class);
+
+ public static final String EMAIL_TEMPLATE_ENCODING = "UTF-8";
+
+ @Bean
+ public ClassLoaderTemplateResolver templateResolver() {
+ final ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
+ templateResolver.setOrder(Integer.valueOf(1));
+ templateResolver.setResolvablePatterns(Collections.singleton("text/*"));
+ templateResolver.setPrefix("/templates/mail/");
+ templateResolver.setSuffix(".txt");
+ templateResolver.setTemplateMode(TemplateMode.TEXT);
+ templateResolver.setCharacterEncoding(EMAIL_TEMPLATE_ENCODING);
+ templateResolver.setCacheable(false);
+ return templateResolver;
+ }
+
+}

src/test/java/net/dancier/kikeriki/ThymeleafSetupCorrectlyTest.java

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+package net.dancier.kikeriki;
+
+import net.dancier.kikeriki.application.CheckAndSendService;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ThymeleafSetupCorrectlyTest extends NeededInfrastructureBaseTestClass {
+
+ @Autowired
+ TemplateEngine templateEngine;
+
+ static Context context;
+
+ @BeforeAll
+ static void init() {
+ Map<String, Object> map = new HashMap<>();
+ map.put("unread_messages", 10);
+ context = new Context(Locale.GERMANY, map);
+ }
+
+ @Test
+ public void test() {
+ String result = templateEngine.process(CheckAndSendService.USER_INFO_MAIL, context);
+ assertThat(result).isNotBlank();
+ }
+
+}