RSpec time comparison matcher to 6 decimal places

eq_time.rb

# On MacOS, time has a precision of 6. On Linux (e.g. CI), time is more precise.
#
# For example:
# Linux: Fri, 22 Oct 2021 11:24:40.219256519 UTC +00:00
# MacOS: Fri, 22 Oct 2021 11:24:40.219256000 UTC +00:00
#
# This matcher compares time with a precision of 6 decimal places to prevent
# time comparison failures in CI.
#
RSpec::Matchers.define(:eq_time) do |expected|
  match do |actual|
    expected.iso8601(6) == actual.iso8601(6)
  end

  failure_message do |actual|
    "expected #{actual.iso8601(6)} to equal time #{expected.iso8601(6)}"
  end
end