assert_isfalse

Check that condition is false.

Syntax

• assert_isfalse(x)
• r = assert_isfalse(x)
• [r, msg] = assert_isfalse(x)
• assert_isfalse(x, err_msg)
• r = assert_isfalse(x, err_msg)
• [r, msg] = assert_isfalse(x, err_msg)

Input argument

• x - a logical value
• err_msg - a string, the error message to be printed in case of failure (optional).

Output argument

• res - a logical value
• msg - a string value, the error message. If x == false, then msg == ''. If x == true, then msg contains the error message.

Description

Raises an error if x is true. Raises an error if x is not a logical.

Examples

assert_isfalse(3 ~= 4)

assert_isfalse(3 == 4)

r = assert_isfalse(false)

[r, msg] = assert_isfalse(false)

[r, msg] = assert_isfalse(3 == 3, 'your error message.')

See also

assert_istrue, assert_checkerror.

History

Author

Allan CORNET