Module: RSpec::Mocks::ArgumentMatchers

Included in:
ExampleMethods
Defined in:
lib/rspec/mocks/argument_matchers.rb

Overview

ArgumentMatchers are placeholders that you can include in message expectations to match arguments against a broader check than simple equality.

With the exception of any_args and no_args, they all match against the arg in same position in the argument list.

See Also:

Instance Method Summary collapse

Instance Method Details

#any_args ⇒ Object

Acts like an arg splat, matching any number of args at any point in an arg list.

Examples:

expect(object).to receive(:message).with(1, 2, any_args)

# matches any of these:
object.message(1, 2)
object.message(1, 2, 3)
object.message(1, 2, 3, 4)


26
27
28
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 26

def any_args
  AnyArgsMatcher::INSTANCE
end

#anything ⇒ Object

Matches any argument at all.

Examples:

expect(object).to receive(:message).with(anything)


34
35
36
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 34

def anything
  AnyArgMatcher::INSTANCE
end

#array_excluding(*args) ⇒ Object

Matches an array that excludes the specified items.

Examples:

expect(object).to receive(:message).with(array_excluding(1,2,3))
expect(object).to receive(:message).with(array_excluding([1,2,3]))


100
101
102
103
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 100

def array_excluding(*args)
  actually_an_array = Array === args.first && args.count == 1 ? args.first : args
  ArrayExcludingMatcher.new(actually_an_array)
end

#array_including(*args) ⇒ Object

Matches an array that includes the specified items at least once. Ignores duplicates and additional values

Examples:

expect(object).to receive(:message).with(array_including(1,2,3))
expect(object).to receive(:message).with(array_including([1,2,3]))


90
91
92
93
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 90

def array_including(*args)
  actually_an_array = Array === args.first && args.count == 1 ? args.first : args
  ArrayIncludingMatcher.new(actually_an_array)
end

#boolean ⇒ Object

Matches a boolean value.

Examples:

expect(object).to receive(:message).with(boolean())


59
60
61
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 59

def boolean
  BooleanMatcher::INSTANCE
end

#duck_type(*args) ⇒ Object

Matches if the actual argument responds to the specified messages.

Examples:

expect(object).to receive(:message).with(duck_type(:hello))
expect(object).to receive(:message).with(duck_type(:hello, :goodbye))


51
52
53
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 51

def duck_type(*args)
  DuckTypeMatcher.new(*args)
end

#hash_excluding(*args) ⇒ Object Also known as: hash_not_including

Matches a hash that doesn't include the specified key(s) or key/value.

Examples:

expect(object).to receive(:message).with(hash_excluding(:key => val))
expect(object).to receive(:message).with(hash_excluding(:key))
expect(object).to receive(:message).with(hash_excluding(:key, :key2 => :val2))


80
81
82
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 80

def hash_excluding(*args)
  HashExcludingMatcher.new(ArgumentMatchers.anythingize_lonely_keys(*args))
end

#hash_including(*args) ⇒ Object

Matches a hash that includes the specified key(s) or key/value pairs. Ignores any additional keys.

Examples:

expect(object).to receive(:message).with(hash_including(:key => val))
expect(object).to receive(:message).with(hash_including(:key))
expect(object).to receive(:message).with(hash_including(:key, :key2 => val2))


70
71
72
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 70

def hash_including(*args)
  HashIncludingMatcher.new(ArgumentMatchers.anythingize_lonely_keys(*args))
end

#instance_of(klass) ⇒ Object Also known as: an_instance_of

Matches if arg.instance_of?(klass)

Examples:

expect(object).to receive(:message).with(instance_of(Thing))


111
112
113
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 111

def instance_of(klass)
  InstanceOf.new(klass)
end

#kind_of(klass) ⇒ Object Also known as: a_kind_of

Matches if arg.kind_of?(klass)

Examples:

expect(object).to receive(:message).with(kind_of(Thing))


121
122
123
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 121

def kind_of(klass)
  KindOf.new(klass)
end

#no_args ⇒ Object

Matches no arguments.

Examples:

expect(object).to receive(:message).with(no_args)


42
43
44
 
# File 'lib/rspec/mocks/argument_matchers.rb', line 42

def no_args
  NoArgsMatcher::INSTANCE
end