I have a class with attribute accessors:
class MyClass
attr_accessor :a, :b
def initialize
@a = 1
@b = 2
end
def update_values options
a = options[:a]
b = options[:b]
end
end
I think that after calling update_values
, a
and b
should retain their new values:
describe MyClass do
before do
@thing = MyClass.new
end
it 'should set a and b' do
expect(@thing.a).to eq 1
expect(@thing.b).to eq 2
@thing.update_values a: 2, b: 5
expect(@thing.a).to eq 2
expect(@thing.b).to eq 5
end
end
This is not happening - the test fails:
Failures:
1) MyClass should set a and b
Failure/Error: expect(@thing.a).to eq 2
expected: 2
got: 1
(compared using ==)
Isn't this how attribute accessors should work? What am I missing?
You are just defining local variables a
and b
.
What you want instead, is to set new values for instance variables a
and b
. Here is how you can do that:
def update_values options
self.a = options[:a] # or @a = options[:a]
self.b = options[:b] # or @b = options[:b]
end
Now:
foo = MyClass.new
#=> #<MyClass:0x007f83eac30300 @a=1, @b=2>
foo.update_values(a: 2, b: 3)
foo #=>#<MyClass:0x007f83eac30300 @a=2, @b=3>
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