Improve coverage

Author: oliemansm

graphql-webclient/src/main/java/graphql/kickstart/spring/webclient/boot/GraphQLErrorsException.java

@@ -2,19 +2,22 @@
 
 import java.util.List;
 import lombok.EqualsAndHashCode;
-import lombok.RequiredArgsConstructor;
+import lombok.NonNull;
 import lombok.Value;
 
 @Value
 @EqualsAndHashCode(callSuper = false)
-@RequiredArgsConstructor
 public class GraphQLErrorsException extends RuntimeException {
 
   transient List<GraphQLError> errors;
+  String message;
 
-  @Override
-  public String getMessage() {
-    return errors.get(0).getMessage();
+  public GraphQLErrorsException(@NonNull List<GraphQLError> errors) {
+    if (errors.isEmpty()) {
+      throw new IllegalArgumentException("errors must not be empty");
+    }
+    this.errors = errors;
+    this.message = errors.get(0).getMessage();
   }
 
 }

graphql-webclient/src/test/java/graphql/kickstart/spring/webclient/boot/GraphQLErrorsExceptionTest.java

@@ -0,0 +1,35 @@
+package graphql.kickstart.spring.webclient.boot;
+
+import static java.util.Collections.emptyList;
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+@SuppressWarnings("ThrowableNotThrown")
+class GraphQLErrorsExceptionTest {
+
+  @Test
+  void construct_nullArg_throwsException() {
+    //noinspection ConstantConditions
+    assertThrows(NullPointerException.class, () -> new GraphQLErrorsException(null));
+  }
+
+  @Test
+  void construct_emptyArg_throwsException() {
+    List<GraphQLError> emptyList = emptyList();
+    assertThrows(IllegalArgumentException.class, () -> new GraphQLErrorsException(emptyList));
+  }
+
+  @Test
+  void construct_errors_returnsErrorsAndFirstMessage() {
+    var error = new GraphQLError();
+    error.setMessage("testmessage");
+    var errors = List.of(error);
+    GraphQLErrorsException e = new GraphQLErrorsException(errors);
+    assertEquals(errors, e.getErrors());
+    assertEquals("testmessage", e.getMessage());
+    assertEquals("testmessage", e.getLocalizedMessage());
+  }
+
+}

lombok.config

@@ -0,0 +1 @@
+lombok.addLombokGeneratedAnnotation = true