This list is based on aliases_spec.rb.
You can see also Module: RSpec::Matchers API.
| matcher | aliased to | description |
|---|---|---|
| a_truthy_value | be_truthy | a truthy value |
| a_falsey_value | be_falsey | a falsey value |
| be_falsy | be_falsey | be falsy |
| a_falsy_value | be_falsey | a falsy value |
| a_nil_value | be_nil | a nil value |
| a_value > 3 | be > 3 | a value > 3 |
| a_value < 3 | be < 3 | a value < 3 |
| a_value <= 3 | be <= 3 | a value <= 3 |
| a_value == 3 | be == 3 | a value == 3 |
| a_value === 3 | be === 3 | a value === 3 |
| an_instance_of(Integer) | be_an_instance_of(Integer) | an instance of Integer |
| a_kind_of(Integer) | be_a_kind_of(Integer) | a kind of Integer |
| a_value_between(1, 10) | be_between(1, 10) | a value between 1 and 10 (inclusive) |
| a_value_within(0.1).of(3) | be_within(0.1).of(3) | a value within 0.1 of 3 |
| within(0.1).of(3) | be_within(0.1).of(3) | within 0.1 of 3 |
| a_block_changing | change | a block changing result |
| changing | change | changing result |
| a_collection_containing_exactly(1, 2) | contain_exactly(1, 2) | a collection containing exactly 1 and 2 |
| containing_exactly(1, 2) | contain_exactly(1, 2) | containing exactly 1 and 2 |
| a_range_covering(1, 2) | cover(1, 2) | a range covering 1 and 2 |
| covering(1, 2) | cover(1, 2) | covering 1 and 2 |
| ending_with(23) | end_with(23) | ending with 23 |
| a_collection_ending_with(23) | end_with(23) | a collection ending with 23 |
| a_string_ending_with("z") | end_with("z") | a string ending with 'z' |
| an_object_eq_to(3) | eq 3 | an object eq to 3 |
| eq_to(3) | eq 3 | eq to 3 |
| an_object_eql_to(3) | eql 3 | an object eql to 3 |
| eql_to(3) | eql 3 | eql to 3 |
| an_object_equal_to(3) | equal 3 | an object equal to 3 |
| equal_to(3) | equal 3 | equal to 3 |
| an_object_existing | exist | an object existing |
| existing | exist | existing |
| an_object_having_attributes(:age => 32) | have_attributes(:age => 32) | an object having attributes {:age => 32} |
| a_string_including("a") | include("a") | a string including 'a' |
| a_collection_including("a") | include("a") | a collection including 'a' |
| a_hash_including(:a => 5) | include(:a => 5) | a hash including {:a => 5} |
| including(3) | include(3) | including 3 |
| a_string_matching(/foo/) | match(/foo/) | a string matching /foo/ |
| an_object_matching(/foo/) | match(/foo/) | an object matching /foo/ |
| match_regex(/foo/) | match(/foo/) | match regex /foo/ |
| matching(/foo/) | match(/foo/) | matching /foo/ |
| a_block_outputting('foo').to_stdout | output('foo').to_stdout | a block outputting 'foo' to stdout |
| a_block_outputting('foo').to_stderr | output('foo').to_stderr | a block outputting 'foo' to stderr |
| a_block_raising(ArgumentError) | raise_error(ArgumentError) | a block raising ArgumentError |
| raising(ArgumentError) | raise_error(ArgumentError) | raising ArgumentError |
| an_object_responding_to(:foo) | respond_to(:foo) | an object responding to #foo |
| responding_to(:foo) | respond_to(:foo) | responding to #foo |
| an_object_satisfying { } | satisfy { } | an object satisfying block |
| satisfying { } | satisfy { } | satisfying block |
| a_collection_starting_with(23) | start_with(23) | a collection starting with 23 |
| a_string_starting_with("z") | start_with("z") | a string starting with 'z' |
| starting_with("d") | start_with("d") | starting with 'd' |
| a_block_throwing(:foo) | throw_symbol(:foo) | a block throwing :foo |
| throwing(:foo) | throw_symbol(:foo) | throwing :foo |
| a_block_yielding_control | yield_control | a block yielding control |
| yielding_control | yield_control | yielding control |
| a_block_yielding_with_no_args | yield_with_no_args | a block yielding with no args |
| yielding_with_no_args | yield_with_no_args | yielding with no args |
| a_block_yielding_with_args | yield_with_args | a block yielding with args |
| yielding_with_args | yield_with_args | yielding with args |
| a_block_yielding_successive_args | yield_successive_args | a block yielding successive args() |
| yielding_successive_args | yield_successive_args | yielding successive args() |
Thank you! This was super helpful for me. 😄