added watermark removal test

ocr-service-v1/ocr-service-server-v1/src/test/java/com/iqser/red/service/ocr/v1/server/service/WatermarkRemovalServiceTest.java

@@ -0,0 +1,33 @@
+package com.iqser.red.service.ocr.v1.server.service;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.io.FileOutputStream;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.io.ClassPathResource;
+
+import com.iqser.red.service.ocr.v1.server.AbstractTest;
+import com.iqser.red.service.ocr.v1.server.utils.OsUtils;
+
+import lombok.SneakyThrows;
+
+class WatermarkRemovalServiceTest extends AbstractTest {
+
+    @Autowired
+    private WatermarkRemovalService watermarkRemovalService;
+
+
+    @Test
+    @SneakyThrows
+    public void removeWatermarksTest() {
+
+        String filename = "files/403-17_Fantom_ToxicidadeInalatoriaAguda.pdf";
+        try (var in = new ClassPathResource(filename).getInputStream(); var out = new FileOutputStream(OsUtils.createTmpFileName(filename, "WATERMARK_REMOVED"))) {
+            watermarkRemovalService.removeWatermarks(in, out);
+        }
+    }
+
+
+}

ocr-service-v1/ocr-service-server-v1/src/test/java/com/iqser/red/service/ocr/v1/server/utils/OsUtils.java

@@ -1,5 +1,8 @@
 package com.iqser.red.service.ocr.v1.server.utils;
 
+import java.nio.file.Path;
+import java.util.stream.Stream;
+
 import org.apache.commons.lang3.StringUtils;
 
 import lombok.SneakyThrows;
@@ -55,4 +58,8 @@ public final class OsUtils {
         return "/tmp";
     }
 
+    public static String createTmpFileName(String filename, String suffix) {
+
+        return Path.of(OsUtils.getTemporaryDirectory()).resolve(Path.of(filename).getFileName()).toString().replace(".pdf", "_" + suffix + ".pdf");
+    }
 }