Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Test contents and results
| Test content | Expected results | Actual results | judge |
|---|---|---|---|
| Enter user name and password | Login successful | Same as expected | adopt |
| Upload correct data sheet | Upload successful | Same as expected | adopt |
| Upload error data table | report errors | Same as expected | adopt |
| Are duplicate values processed | Processed | Same as expected | adopt |
| Are missing values populated | Filled | Same as expected | adopt |
| Are outliers handled | Processed | Same as expected | adopt |
| Whether data can be saved | Successfully saved | Same as expected | adopt |