assert.true()

version added: 2.11

true( actual [, message ] )

A strict comparison that passes if the first argument is boolean true.

name description
actual Expression being tested
message (string) A short description of the assertion

Description

true() requires just one argument. If the argument evaluates to true, the assertion passes; otherwise, it fails.

This method is similar to the assertTrue() method found in xUnit-style frameworks.

false() can be used to explicitly test for a false value.

Examples

QUnit.test( "example", assert => {
  // success
  assert.true( true, "boolean true" );

  // failure
  assert.true( "foo", "non-empty string" );
  assert.true( "", "empty string" );
  assert.true( 0, "number zero" );
  assert.true( false, "boolean false" );
  assert.true( NaN, "NaN value" );
  assert.true( null, "null value" );
  assert.true( undefined, "undefined value" );
});