Preformatted ordered values to simplify comparison

Author: seregamorph

src/main/java/digital/pragmatech/testing/ContextCacheEntry.java

@@ -1,20 +1,14 @@
 package digital.pragmatech.testing;
 
+import org.springframework.test.context.MergedContextConfiguration;
+
 import java.time.Instant;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-import java.util.Set;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.stream.Collectors;
 
-import org.springframework.test.context.MergedContextConfiguration;
-
 /**
  * Entry representing a cached context configuration.
  */
@@ -181,8 +175,10 @@ public Map<String, Object> getConfigurationSummary() {
 
       summary.put("properties", configuration.getPropertySourceProperties().length + " properties");
       summary.put("parentContext", configuration.getParent());
-      summary.put("contextCustomizers", configuration.getContextCustomizers());
-      summary.put("locations", String.join(",", configuration.getLocations()));
+      // contextCustomizers equality is based on Set. Convert to ordered String representation to simplify comparison
+      summary.put("contextCustomizers", prettyPrintCollection(toStringSortedSet(configuration.getContextCustomizers())));
+      // locations equality is based on String[], no ordering
+      summary.put("locations", String.join(",", prettyPrintCollection(Arrays.asList(configuration.getLocations()))));
 
       summary.put("contextInitializers", configuration.getContextInitializerClasses().stream()
         .map(Class::getSimpleName)
@@ -193,4 +189,36 @@ public Map<String, Object> getConfigurationSummary() {
 
     return summary;
   }
+
+  /**
+   * Convert collection of objects to SortedSet of String. This can be helpful for visually comparable representations.
+   *
+   * TODO move to string utility class
+   *
+   * @param elements
+   * @return
+   */
+  private static SortedSet<String> toStringSortedSet(Collection<?> elements) {
+    var set = new TreeSet<String>();
+    elements.forEach(e -> set.add(Objects.toString(e)));
+    return set;
+  }
+
+  /**
+   * Pretty format collection elements (new line for each element).
+   *
+   * TODO move to string utility class
+   *
+   * @param elements
+   * @return
+   */
+  private static String prettyPrintCollection(Collection<String> elements) {
+    if (elements == null) {
+      return "";
+    }
+    if (elements.isEmpty()) {
+      return "[]";
+    }
+    return "[\n" + String.join(",\n", elements) + "\n]";
+  }
 }

src/main/resources/templates/fragments/configurations.html

@@ -30,7 +30,9 @@ <h2>Spring Context Configurations</h2>
         <div class="config-details">
           <div th:each="entry : ${configInfo.configuration.entrySet()}" class="config-detail-item">
             <div class="config-detail-key" th:text="${entry.key + ':'}">Key:</div>
-            <div class="config-detail-value" th:text="${entry.value}">Value</div>
+            <div class="config-detail-value">
+              <pre th:text="${entry.value}"></pre>
+            </div>
           </div>
         </div>