result = crawlJob.hotThread(-1);
        assertEquals(-1, crawlJob.hotThreadInterval);
        assertSame(crawlJob, result);
    }

    // Test getExecuteType method
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_CRAWLER, crawlJob.getExecuteType());
    }

    // Test execute method with runAll scenario
    public void test_execute_runAll() {
        // Setup test

                    deleteDirectory(file);
                }
            }
        }
        dir.delete();
    }

    // Test getExecuteType method
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_THUMBNAIL, thumbnailJob.getExecuteType());
    }

    // Test numOfThreads setter
    public void test_numOfThreads() {

                + "/test////etc/passwd";
        assertEquals(expectedPath, pythonJob.getPyFilePath());
    }

    // Test getExecuteType method
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_PYTHON, pythonJob.getExecuteType());
    }

    // Test execute method with successful execution
    public void test_execute_success() {

        String result = execJob.execute(jobExecutor);
        assertEquals("success", result);
        assertSame(jobExecutor, execJob.jobExecutor);
    }

    // Test getExecuteType
    public void test_getExecuteType() {
        assertEquals("test", execJob.getExecuteType());

        execJob.setExecuteType("crawler");
        assertEquals("crawler", execJob.getExecuteType());
    }

    // Test jobExecutor setter

        } catch (Exception e) {
            // May throw different exception in test environment
            assertNotNull(e);
        }
    }

    // Test getExecuteType method
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_SUGGEST, suggestJob.getExecuteType());
    }

    // Test session ID generation
    public void test_sessionIdGeneration() {