[FINERACT-1678] Fix Job API with empty request body

fineract-provider/src/main/java/org/apache/fineract/infrastructure/jobs/service/JobParameterDataParser.java

@@ -27,6 +27,7 @@ import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
 import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.fineract.infrastructure.core.serialization.FromJsonHelper;
 import org.apache.fineract.infrastructure.jobs.data.JobParameterDTO;
 import org.springframework.stereotype.Component;
@@ -38,7 +39,7 @@ public class JobParameterDataParser {
     private final FromJsonHelper jsonHelper;
 
     public Set<JobParameterDTO> parseExecution(String requestBody) {
-        if (Objects.isNull(requestBody)) {
+        if (StringUtils.isBlank(requestBody)) {
             return Collections.emptySet();
         }
         JsonObject element = JsonParser.parseString(requestBody).getAsJsonObject();

fineract-provider/src/test/java/org/apache/fineract/infrastructure/jobs/service/JobParameterDataParserTest.java

@@ -0,0 +1,48 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.infrastructure.jobs.service;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Collections;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.mockito.junit.jupiter.MockitoSettings;
+import org.mockito.quality.Strictness;
+
+@ExtendWith(MockitoExtension.class)
+@MockitoSettings(strictness = Strictness.LENIENT)
+class JobParameterDataParserTest {
+
+    @InjectMocks
+    private JobParameterDataParser testObj;
+
+    @Test
+    public void shouldParserReturnsWithEmptyListWhenRequestBodyIsNull() {
+        assertEquals(Collections.emptySet(), testObj.parseExecution(null));
+    }
+
+    @Test
+    public void shouldParserReturnsWithEmptyListWhenRequestBodyIsEmptyString() {
+        assertEquals(Collections.emptySet(), testObj.parseExecution(""));
+    }
+
+}