manifest_test.rb

require "test_helper"

class ManifestTest < Minitest::Test
  def test_lookup_exception!
    asset_file = "calendar.js"

    error = assert_raises_manifest_missing_entry_error do
      Webpacker.manifest.lookup!(asset_file)
    end

    assert_match "Webpacker can't find #{asset_file} in #{manifest_path}", error.message
  end

  def test_lookup_with_type_exception!
    asset_file = "calendar"

    error = assert_raises_manifest_missing_entry_error do
      Webpacker.manifest.lookup!(asset_file, type: :javascript)
    end

    assert_match "Webpacker can't find #{asset_file}.js in #{manifest_path}", error.message
  end

  def test_lookup_success!
    assert_equal Webpacker.manifest.lookup!("bootstrap.js"), "/packs/bootstrap-300631c4f0e0f9c865bc.js"
  end

  def test_lookup_with_chunks_without_extension_success!
    assert_equal ["/packs/bootstrap-300631c4f0e0f9c865bc.js"], Webpacker.manifest.lookup_pack_with_chunks!("bootstrap", type: :javascript)
  end

  def test_lookup_with_chunks_with_extension_success!
    assert_equal ["/packs/bootstrap-300631c4f0e0f9c865bc.js"], Webpacker.manifest.lookup_pack_with_chunks!("bootstrap.js", type: :javascript)
  end

  def test_lookup_with_chunks_without_extension_subdir_success!
    assert_equal ["/packs/print/application-983b6c164a47f7ed49cd.css"], Webpacker.manifest.lookup_pack_with_chunks!("print/application", type: :css)
  end

  def test_lookup_with_chunks_with_extension_subdir_success!
    assert_equal ["/packs/print/application-983b6c164a47f7ed49cd.css"], Webpacker.manifest.lookup_pack_with_chunks!("print/application.css", type: :css)
  end

  def test_lookup_nil
    assert_nil Webpacker.manifest.lookup("foo.js")
  end

  def test_lookup_chunks_nil
    assert_nil Webpacker.manifest.lookup_pack_with_chunks("foo.js")
  end

  def test_lookup_success
    assert_equal Webpacker.manifest.lookup("bootstrap.js"), "/packs/bootstrap-300631c4f0e0f9c865bc.js"
  end

  def test_lookup_entrypoint_exception!
    asset_file = "calendar"

    error = assert_raises_manifest_missing_entry_error do
      Webpacker.manifest.lookup_pack_with_chunks!(asset_file, type: :javascript)
    end

    assert_match "Webpacker can't find #{asset_file}.js in #{manifest_path}", error.message
  end

  def test_lookup_entrypoint
    application_entrypoints = [
      "/packs/vendors~application~bootstrap-c20632e7baf2c81200d3.chunk.js",
      "/packs/vendors~application-e55f2aae30c07fb6d82a.chunk.js",
      "/packs/application-k344a6d59eef8632c9d1.js"
    ]

    assert_equal Webpacker.manifest.lookup_pack_with_chunks!("application", type: :javascript), application_entrypoints
  end

  private

    def assert_raises_manifest_missing_entry_error(&block)
      error = nil
      Webpacker.config.stub :compile?, false do
        error = assert_raises Webpacker::Manifest::MissingEntryError, &block
      end
      error
    end

    def manifest_path
      File.expand_path File.join(File.dirname(__FILE__), "test_app/public/packs", "manifest.json").to_s
    end
end