SEND:SELECT * FROM users;
EXPECT:+-----+-------+-----+
EXPECT:| _id | name  | age |
EXPECT:+-----+-------+-----+
EXPECT:|   1 | Anne  |  38 |
EXPECT:|   2 | Bill  |  23 |
EXPECT:|   3 | Cindy |  64 |
EXPECT:+-----+-------+-----+
EXPECT:

// Redirect output to a file.
SEND:\o test-output-file
SEND:SELECT * FROM users;

// Ensure the output went to the file.
SEND:\! cat test-output-file
EXPECT:+-----+-------+-----+
EXPECT:| _id | name  | age |
EXPECT:+-----+-------+-----+
EXPECT:|   1 | Anne  |  38 |
EXPECT:|   2 | Bill  |  23 |
EXPECT:|   3 | Cindy |  64 |
EXPECT:+-----+-------+-----+
EXPECT:

// Let's test some qecho stuff here while we're at it.
SEND:\qecho string with "double quotes"
SEND:\qecho -n one
SEND:\qecho -n two
SEND:\qecho three
SEND:\qecho four

SEND:\! cat test-output-file
EXPECT:+-----+-------+-----+
EXPECT:| _id | name  | age |
EXPECT:+-----+-------+-----+
EXPECT:|   1 | Anne  |  38 |
EXPECT:|   2 | Bill  |  23 |
EXPECT:|   3 | Cindy |  64 |
EXPECT:+-----+-------+-----+
EXPECT:
EXPECT:string with "double quotes"
EXPECT:onetwothree
EXPECT:four

// And \warn messages should still go to stderr, not the file.
SEND:\warn a warning string
EXPECT:a warning string

// Remove the file.
SEND:\! rm test-output-file

// Set the output back to stdout.
SEND:\o
SEND:SELECT * FROM users;
EXPECT:+-----+-------+-----+
EXPECT:| _id | name  | age |
EXPECT:+-----+-------+-----+
EXPECT:|   1 | Anne  |  38 |
EXPECT:|   2 | Bill  |  23 |
EXPECT:|   3 | Cindy |  64 |
EXPECT:+-----+-------+-----+
EXPECT:

// Ensure extra arguments to \output causes an error.
SEND:\o filename extra
EXPECT:executing meta command: meta command 'output' takes zero or one argument