class RSpec::Memory::Matchers::LimitAllocations
Public Class Methods
new(allocations = {}, count: nil, size: nil)
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 32 def initialize(allocations = {}, count: nil, size: nil) @count = count @size = size @allocations = {} @errors = [] allocations.each do |klass, count| self.of(klass, count: count) end end
Public Instance Methods
failure_message()
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 103 def failure_message "exceeded allocation limit: #{@errors.join(', ')}" end
matches?(given_proc)
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 67 def matches?(given_proc) return true unless trace = Trace.capture(@allocations.keys, &given_proc) if @count or @size # If the spec specifies a total limit, we have a limit which we can enforce which takes all allocations into account: total = trace.total check(total.count, @count) do |expected| @errors << "allocated #{total.count} instances, #{total.size} bytes, #{expected} instances" end if @count check(total.size, @size) do |expected| @errors << "allocated #{total.count} instances, #{total.size} bytes, #{expected} bytes" end if @size else # Otherwise unspecified allocations are considered an error: trace.ignored.each do |klass, allocation| @errors << "allocated #{allocation.count} #{klass} instances, #{allocation.size} bytes, but it was not specified" end end trace.allocated.each do |klass, allocation| next unless acceptable = @allocations[klass] check(allocation.count, acceptable[:count]) do |expected| @errors << "allocated #{allocation.count} #{klass} instances, #{allocation.size} bytes, #{expected} instances" end check(allocation.size, acceptable[:size]) do |expected| @errors << "allocated #{allocation.count} #{klass} instances, #{allocation.size} bytes, #{expected} bytes" end end return @errors.empty? end
of(klass, **limits)
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 48 def of(klass, **limits) @allocations[klass] = limits return self end
supports_block_expectations?()
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 44 def supports_block_expectations? true end
Private Instance Methods
check(value, limit) { |"expected within #{limit}"| ... }
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# File lib/rspec/memory/matchers/limit_allocations.rb, line 54 def check(value, limit) case limit when Range unless limit.include? value yield "expected within #{limit}" end when Integer unless value == limit yield "expected exactly #{limit}" end end end