Output

It can be interesting to view the values on which an assertion is made (for example for debugging). The output allows that.

This is a simple example :

import static org.assertj.db.output.Outputs.output;

Table table = connection.table("members");

// Output the content of the table in the console
output(table).toConsole();

These lines give the result below :

[MEMBERS table]
|-----------|---------|-----------|-----------|--------------|-----------|-----------|-----------|
|           |         | *         |           |              |           |           |           |
|           | PRIMARY | ID        | NAME      | FIRSTNAME    | SURNAME   | BIRTHDATE | SIZE      |
|           | KEY     | (NUMBER)  | (TEXT)    | (TEXT)       | (TEXT)    | (DATE)    | (NUMBER)  |
|           |         | Index : 0 | Index : 1 | Index : 2    | Index : 3 | Index : 4 | Index : 5 |
|-----------|---------|-----------|-----------|--------------|-----------|-----------|-----------|
| Index : 0 | 1       | 1         | Hewson    | Paul David   | Bono      | 05-10-60  | 1.75      |
| Index : 1 | 2       | 2         | Evans     | David Howell | The Edge  | 08-08-61  | 1.77      |
| Index : 2 | 3       | 3         | Clayton   | Adam         |           | 03-13-60  | 1.78      |
| Index : 4 | 4       | 4         | Mullen    | Larry        |           | 10-31-61  | 1.70      |
|-----------|---------|-----------|-----------|--------------|-----------|-----------|-----------|

In the example above, the output is in plain text in the console. It is possible to change the type of the output and the destination.

Type of output

There are two outputs already implemented :

PLAIN : shown in the example above (the default output type)
HTML : which represents the result as an HTML document

// Change the output of the table to be HTML
output(table).withType(OutputType.HTML).....;

Note that the type of output is extensible because the withType(Output outputType) method’s parameter is an instance of the Output interface. So this is not limited to the implementations in the OutputType enum.

Destination

The destination is the way to print the display. There are three destinations :

the console (with the toConsole() method)
a file (with the toFile(String fileName) method)
a stream (with the toStream(OutputStream outputStream) method)

Note that with this last method the possibilities of destination are really flexible.

These three methods are fluent. In this short example, the output is a plain text representation in the console and a html output in a file :

// Display the content of the table with plain text in the console
// and with HTML output in the file
output(table).toConsole().withType(OutputType.HTML).toFile("test.html");