minimum_coverage raises KeyError with oneshot_line coverage

[willnet]

After oneshot_line coverage support was added in 522dc7d, minimum_coverage appears to crash with a KeyError when oneshot_line is used as the primary coverage.

It looks like minimum_coverage ends up checking :oneshot_line, while coverage_statistics only exposes :line, :branch, and :method.

Reproduction

Run this single-file repro script:

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"
  gem "simplecov", github: "simplecov-ruby/simplecov", branch: "main"
end

require "tmpdir"
require "fileutils"

dir = Dir.mktmpdir("simplecov-oneshot-repro")
at_exit { FileUtils.remove_entry(dir) if Dir.exist?(dir) }

source_file = File.join(dir, "sample.rb")

File.write(source_file, <<~RUBY)
  def greet(name)
    return "hi" if name

    "hello"
  end

  greet("world")
RUBY

require "simplecov"

SimpleCov.start do
  enable_coverage :oneshot_line
  primary_coverage :oneshot_line
  minimum_coverage 100
end

load source_file

Expected behavior

minimum_coverage should work with oneshot_line coverage, or at least fail gracefully with a clear error.

Actual behavior

It raises:

'Hash#fetch': key not found: :oneshot_line (KeyError)