RSpec 3 has updated syntax from previous versions including replacing 'should' with 'expect', removing be_true/be_false in favor of be_truthy/be_falsey, and allowing chaining of expectations using simpler operators like | and & instead of 'or' and 'and'. Pending examples now fail if they pass instead of being skipped.

1. RSpec 3 Syntax

2. No more ‘should’

3. Use only ‘expect’

4. (1+1).should eq 2
becomes
expect(1+1).to eq 2

5. be_true and be_false
are gone

6. use
be_truthy and be_falsey
instead

7. my_obj.test.should be_true
becomes
expect(my_obj.test).to be_truthy

8. Use curly braces when
you want to evaluate
later.

9. expect{ my_obj.oops }.to raise_error

10. Pending examples are
now run.
They fail if they pass.

11. One liners are changed
it { should be_empty }
it { is_expected.to be_empty }

12. Chaining expectations!
expect(my_color).to eq(‘red’).or
eq(‘blue’).or eq(‘green’)
expect(alphabet).to start_with(‘a’).and
include(‘h’).and end_with(‘z’)

13. Simpler!
expect(my_color).to eq(‘red’) | eq(‘blue’)
| eq(‘green’)
expect(alphabet).to start_with(‘a’) &
include(‘h’) & end_with(‘z’)