code for BAEL-860 - Introduction to mustache (#1885)

2017-05-20 20:21:33 +03:00
parent d1cc70666e
commit cfc44ecbb6
10 changed files with 299 additions and 0 deletions
@@ -0,0 +1,102 @@
+package com.baeldung.mustache;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.temporal.TemporalUnit;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+
+import org.junit.Test;
+
+import com.baeldung.mustache.model.Todo;
+import com.github.mustachejava.Mustache;
+public class TodoMustacheServiceTest {
+
+    private String executeTemplate(Mustache m, Map<String, Object> context) throws IOException{
+        StringWriter writer = new StringWriter();
+        m.execute(writer, context).flush();
+        return writer.toString();
+    }
+    
+    private String executeTemplate(Mustache m, Todo todo) throws IOException{
+        StringWriter writer = new StringWriter();
+        m.execute(writer, todo).flush();
+        return writer.toString();
+    }
+    
+    @Test
+    public void givenTodoObject_whenGetHtml_thenSuccess() throws IOException{
+        Todo todo = new Todo("Todo 1", "Todo description");
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todo.mustache");
+        Map<String, Object> context = new HashMap<>();
+        context.put("todo", todo);
+        
+        String expected = "<h2>Todo 1</h2>";
+        assertThat(executeTemplate(m, todo)).contains(expected);
+    }
+    
+    @Test
+    public void givenNullTodoObject_whenGetHtml_thenEmptyHtml() throws IOException{
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todo-section.mustache");
+        Map<String, Object> context = new HashMap<>();
+        assertThat(executeTemplate(m, context)).isEmpty();
+    }
+    
+    @Test
+    public void givenTodoList_whenGetHtml_thenSuccess() throws IOException{
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todos.mustache");
+        
+        List<Todo> todos = Arrays.asList(
+            new Todo("Todo 1", "Todo description"),
+            new Todo("Todo 2", "Todo description another"),
+            new Todo("Todo 3", "Todo description another")
+          );
+        Map<String, Object> context = new HashMap<>();
+        context.put("todos", todos);
+        
+        assertThat(executeTemplate(m, context))
+          .contains("<h2>Todo 1</h2>")
+          .contains("<h2>Todo 2</h2>")
+          .contains("<h2>Todo 3</h2>");
+    }
+    
+    @Test
+    public void givenEmptyList_whenGetHtml_thenEmptyHtml() throws IOException{
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todos.mustache");
+        
+        Map<String, Object> context = new HashMap<>();
+        assertThat(executeTemplate(m, context)).isEmpty();;
+    }
+    
+    @Test
+    public void givenEmptyList_whenGetHtmlUsingInvertedSection_thenHtml() throws IOException{
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todos-inverted-section.mustache");
+        
+        Map<String, Object> context = new HashMap<>();
+        assertThat(executeTemplate(m, context).trim()).isEqualTo("<p>No todos!</p>");
+    }
+    
+    @Test
+    public void givenTodoList_whenGetHtmlUsingLamdba_thenHtml() throws IOException{
+        Mustache m = MustacheUtil.getMustacheFactory().compile("todos-lambda.mustache");
+        List<Todo> todos = Arrays.asList(
+            new Todo("Todo 1", "Todo description"),
+            new Todo("Todo 2", "Todo description another"),
+            new Todo("Todo 3", "Todo description another")
+          );
+        todos.get(2).setDone(true);
+        todos.get(2).setCompletedOn(Date.from(Instant.now().plusSeconds(300)));
+        
+        Map<String, Object> context = new HashMap<>();
+        context.put("todos", todos);
+        assertThat(executeTemplate(m, context).trim()).contains("Done 5 minutes ago");
+    }
+}