Fix Sonar warnings

src/main/java/info/freelibrary/iiif/webrepl/Server.java

@@ -17,6 +17,7 @@
 import java.net.URISyntaxException;
 import java.net.URLDecoder;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.security.CodeSource;
 import java.time.Duration;
 import java.util.List;
@@ -159,7 +160,7 @@ private static class JPv3Handler implements Handler {
         }
 
         @Override
-        @SuppressWarnings({ PMD.COGNITIVE_COMPLEXITY, PMD.SYSTEM_PRINTLN, PMD.COGNITIVE_COMPLEXITY,
+        @SuppressWarnings({ PMD.COGNITIVE_COMPLEXITY, PMD.SYSTEM_PRINTLN, Sonar.COGNITIVE_COMPLEXITY,
             Sonar.SYSTEM_OUT_ERR })
         public void handle(final Request aRequest, final Consumer<Response> aCallback) {
             final String uri = aRequest.uri();
@@ -228,9 +229,7 @@ public void handle(final Request aRequest, final Consumer<Response> aCallback) {
                         response = getResponse(NOT_FOUND, TEXT_CONTENT_TYPE, EMPTY_BODY);
                     }
                 }
-                default -> {
-                    response = getResponse(METHOD_NOT_ALLOWED, TEXT_CONTENT_TYPE, EMPTY_BODY);
-                }
+                default -> response = getResponse(METHOD_NOT_ALLOWED, TEXT_CONTENT_TYPE, EMPTY_BODY);
             }
 
             aCallback.accept(response);
@@ -293,22 +292,17 @@ private String getImports() throws IOException {
          * @throws IOException If there is trouble reading the imports file
          */
         private String getImports(final String aSnippet) throws IOException {
-            File importsFile = new File("/etc/jshell/imports.jsh");
+            File importsFile = Path.of("/etc/jshell/imports.jsh").toFile();
 
             // Check to see if we're running from the Maven build
             if (!importsFile.exists()) {
-                importsFile = new File("src/main/docker/imports.jsh");
+                importsFile = Path.of("src/main/docker/imports.jsh").toFile();
             }
 
-            try (BufferedReader reader = Files.newBufferedReader(importsFile.toPath())) {
+            try (final BufferedReader reader = Files.newBufferedReader(importsFile.toPath())) {
                 return reader.lines().filter(line -> !line.isBlank()).filter(line -> {
                     final String className = line.substring(line.lastIndexOf('.') + 1, line.length() - 1);
-
-                    if (aSnippet == null || aSnippet.contains(className)) {
-                        return true;
-                    }
-
-                    return false;
+                    return aSnippet == null || aSnippet.contains(className);
                 }).collect(Collectors.joining(EOL)) + EOL;
             }
         }

src/test/java/info/freelibrary/iiif/webrepl/DiagConsumerTest.java

@@ -0,0 +1,54 @@
+
+package info.freelibrary.iiif.webrepl;
+
+import static info.freelibrary.util.Constants.EMPTY;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+import jdk.jshell.JShell;
+import jdk.jshell.SnippetEvent;
+
+/**
+ * Tests of <code>DiagConsumer</code>.
+ */
+class DiagConsumerTest {
+
+    /** The expected output from the test. */
+    private static final String EXPECTED = """
+        Could not parse:
+
+        1 int x = [["not a number"]];
+
+        Reason: incompatible types: java.lang.String cannot be converted to int
+        """;
+
+    /**
+     * Tests the <code>DiagConsumer</code> constructor.
+     */
+    @Test
+    final void testAcceptDiagConsumer() {
+        try (JShell jshell = JShell.create()) {
+            final StringBuilder builder = new StringBuilder("int x = \"not a number\";");
+            final DiagConsumer consumer = new DiagConsumer(builder);
+
+            for (final SnippetEvent event : jshell.eval(builder.toString())) {
+                jshell.diagnostics(event.snippet()).forEach(consumer::accept);
+            }
+
+            assertEquals(EXPECTED, builder.toString());
+        }
+    }
+
+    /**
+     * Tests the <code>DiagConsumer</code> constructor.
+     */
+    @Test
+    final void testConstructor() {
+        final StringBuilder builder = new StringBuilder();
+
+        new DiagConsumer(builder);
+
+        assertEquals(EMPTY, builder.toString().trim());
+    }
+}