Throw an exception no argument

src/main/java/org/openmainframeproject/cobolcheck/features/argumentHandler/ArgumentHandler.java

@@ -142,6 +142,7 @@ private void processCommandLineArgumentArray(String[] args) {
 
     public void loadArgProgramPaths(){
         String applicationSourceDirectory = Config.getApplicationSourceDirectoryPathString();
+        boolean isProgramSpecified = false;
         for (OptionKey optionKey : options.keySet()) {
             if (optionKey.shortKey.equals(Constants.PROGRAMS_OPTION) || optionKey.longKey.equals(Constants.PROGRAMS_OPTION)) {
                 String programArgs = options.get(optionKey).argumentValue;
@@ -152,8 +153,13 @@ public void loadArgProgramPaths(){
                     newValue += "|";
                 }
                 options.get(optionKey).argumentValue = newValue.substring(0, newValue.length()-1);
+                if(!programArgs.equals("")) isProgramSpecified = true;
             }
         }
+        if(!isProgramSpecified){
+            // return error when no program is passed
+            throw new CommandLineArgumentException(Messages.get("ERR030"));
+        }
     }
 
     private OptionValue lookupOption(String requestedOption) {

src/main/resources/org/openmainframeproject/cobolcheck/messages/messages.properties

@@ -30,6 +30,9 @@ ERR027 = ERR027: NumericFields.dataTypeOf() was called with empty fieldName.
 ERR028 = ERR028: NumericFields.setDataTypeOf() was called with empty fieldName.
 ERR029 = ERR029: NumericFields.setDataTypeOf() was called with null dataType.
 
+ERR030 = ERR030: Command line missing program argument '-p programName' .
+
+
 WRN001 = WRN001: No test suite directory for program %1$s was found under directory %2$s.
 WRN002 = WRN002: No test suite files were found under directory %1$s.
 WRN003 = WRN003: DirectoryNameMatcher caught IOException on file %1$s.

src/test/java/org/openmainframeproject/cobolcheck/ArgumentHandlerTest.java

@@ -133,4 +133,26 @@ public void it_throws_when_no_value_is_passed_for_the_last_argument_and_it_requi
         });
     }
 
+    @Test
+    public void it_throws_when_program_argument_is_not_present() {
+        Throwable ex = assertThrows(CommandLineArgumentException.class, () -> {
+            ArgumentHandler argumentHandler = new ArgumentHandler(new String[] { },
+                    optionSpec);
+            argumentHandler.loadArgProgramPaths();
+        });
+        assertEquals("ERR030: Command line missing program argument '-p programName' .",
+        ex.getMessage());
+    }
+
+    @Test
+    public void it_throws_when_program_argument_is_not_presen_and_has_other_argument() {
+        Throwable ex = assertThrows(CommandLineArgumentException.class, () -> {
+            ArgumentHandler argumentHandler = new ArgumentHandler(new String[] {"-c", "config.properties" },
+                    optionSpec);
+            argumentHandler.loadArgProgramPaths();
+        });
+        assertEquals("ERR030: Command line missing program argument '-p programName' .",
+        ex.getMessage());
+    }
+
 }