# frozen_string_literal: true

require "helper"

class DropFixture < Jekyll::Drops::Drop
  mutable true

  def foo
    "bar"
  end

  def fallback_data
    @fallback_data ||= {}
  end
end

class TestDrop < JekyllUnitTest
  context "a document drop" do
    setup do
      @site = fixture_site({
        "collections" => ["methods"],
      })
      @site.process
      @document = @site.collections["methods"].docs.detect do |d|
        d.relative_path == "_methods/configuration.md"
      end
      @document_drop = @document.to_liquid
      @drop = DropFixture.new({})
    end

    should "reject 'nil' key" do
      refute @drop.key?(nil)
    end

    should "return values for #[]" do
      assert_equal "bar", @drop["foo"]
    end

    should "return values for #invoke_drop" do
      assert_equal "bar", @drop.invoke_drop("foo")
    end

    context "mutations" do
      should "return mutations for #[]" do
        @drop["foo"] = "baz"
        assert_equal "baz", @drop["foo"]
      end

      should "return mutations for #invoke_drop" do
        @drop["foo"] = "baz"
        assert_equal "baz", @drop.invoke_drop("foo")
      end
    end

    context "fetch" do
      should "raise KeyError if key is not found and no default provided" do
        assert_raises KeyError do
          @document_drop.fetch("not_existing_key")
        end
      end

      should "fetch value without default" do
        assert_equal "Jekyll.configuration", @document_drop.fetch("title")
      end

      should "fetch default if key is not found" do
        assert_equal "default", @document_drop.fetch("not_existing_key", "default")
      end

      should "fetch default boolean value correctly" do
        assert_equal false, @document_drop.fetch("bar", false)
      end

      should "fetch default value from block if key is not found" do
        assert_equal "default bar", @document_drop.fetch("bar") { |el| "default #{el}" }
      end

      should "fetch default value from block first if both argument and block given" do
        assert_equal "baz", @document_drop.fetch("bar", "default") { "baz" }
      end

      should "not change mutability when fetching" do
        assert @drop.class.mutable?
        @drop["foo"] = "baz"
        assert_equal "baz", @drop.fetch("foo")
        assert @drop.class.mutable?
      end
    end
  end
end