115 lines
3.4 KiB
Ruby
115 lines
3.4 KiB
Ruby
module Shoulda # :nodoc:
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module Matchers
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module ActionController # :nodoc:
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# Ensures that the controller assigned to the named instance variable.
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#
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# Options:
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# * <tt>with_kind_of</tt> - The expected class of the instance variable
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# being checked.
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# * <tt>with</tt> - The value that should be assigned.
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#
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# Example:
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#
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# it { should assign_to(:user) }
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# it { should_not assign_to(:user) }
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# it { should assign_to(:user).with_kind_of(User) }
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# it { should assign_to(:user).with(@user) }
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def assign_to(variable)
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AssignToMatcher.new(variable)
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end
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class AssignToMatcher # :nodoc:
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def initialize(variable)
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@variable = variable.to_s
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@check_value = false
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end
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def with_kind_of(expected_class)
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@expected_class = expected_class
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self
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end
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def with(expected_value = nil, &block)
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@check_value = true
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@expected_value = expected_value
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@expectation_block = block
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self
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end
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def matches?(controller)
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@controller = controller
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@expected_value = @context.instance_eval(&@expectation_block) if @expectation_block
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assigned_value? && kind_of_expected_class? && equal_to_expected_value?
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end
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attr_reader :failure_message, :negative_failure_message
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def description
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description = "assign @#{@variable}"
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description << " with a kind of #{@expected_class}" if @expected_class
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description
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end
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def in_context(context)
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@context = context
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self
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end
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private
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def assigned_value?
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if !@controller.instance_variables.map(&:to_s).include?("@#{@variable}")
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@failure_message =
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"Expected action to assign a value for @#{@variable}"
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false
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else
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@negative_failure_message =
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"Didn't expect action to assign a value for @#{@variable}, " <<
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"but it was assigned to #{assigned_value.inspect}"
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true
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end
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end
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def kind_of_expected_class?
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return true unless @expected_class
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if assigned_value.kind_of?(@expected_class)
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@negative_failure_message =
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"Didn't expect action to assign a kind of #{@expected_class} " <<
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"for #{@variable}, but got one anyway"
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true
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else
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@failure_message =
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"Expected action to assign a kind of #{@expected_class} " <<
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"for #{@variable}, but got #{assigned_value.inspect} " <<
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"(#{assigned_value.class.name})"
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false
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end
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end
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def equal_to_expected_value?
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return true unless @check_value
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if @expected_value == assigned_value
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@negative_failure_message =
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"Didn't expect action to assign #{@expected_value.inspect} " <<
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"for #{@variable}, but got it anyway"
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true
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else
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@failure_message =
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"Expected action to assign #{@expected_value.inspect} " <<
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"for #{@variable}, but got #{assigned_value.inspect}"
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false
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end
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end
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def assigned_value
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@controller.instance_variable_get("@#{@variable}")
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end
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end
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end
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end
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end
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