require_relative '../../spec_helper'
require 'date'
date_version = defined?(Date::VERSION) ? Date::VERSION : '3.1.0'

describe "DateTime#deconstruct_keys" do
  it "returns whole hash for nil as an argument" do
    d = DateTime.new(2022, 10, 5, 13, 30)
    res = { year: 2022, month: 10, day: 5, yday: 278, wday: 3, hour: 13,
            min: 30, sec: 0, sec_fraction: (0/1), zone: "+00:00" }
    d.deconstruct_keys(nil).should == res
  end

  it "returns only specified keys" do
    d = DateTime.new(2022, 10, 5, 13, 39)
    d.deconstruct_keys([:zone, :hour]).should == { zone: "+00:00", hour: 13 }
  end

  it "requires one argument" do
    -> {
      DateTime.new(2022, 10, 5, 13, 30).deconstruct_keys
    }.should raise_error(ArgumentError)
  end

  it "it raises error when argument is neither nil nor array" do
    d = DateTime.new(2022, 10, 5, 13, 30)

    -> { d.deconstruct_keys(1) }.should raise_error(TypeError, "wrong argument type Integer (expected Array or nil)")
    -> { d.deconstruct_keys("asd") }.should raise_error(TypeError, "wrong argument type String (expected Array or nil)")
    -> { d.deconstruct_keys(:x) }.should raise_error(TypeError, "wrong argument type Symbol (expected Array or nil)")
    -> { d.deconstruct_keys({}) }.should raise_error(TypeError, "wrong argument type Hash (expected Array or nil)")
  end

  it "returns {} when passed []" do
    DateTime.new(2022, 10, 5, 13, 30).deconstruct_keys([]).should == {}
  end

  it "ignores non-Symbol keys" do
    DateTime.new(2022, 10, 5, 13, 30).deconstruct_keys(['year', []]).should == {}
  end

  it "ignores not existing Symbol keys" do
    DateTime.new(2022, 10, 5, 13, 30).deconstruct_keys([:year, :a]).should == { year: 2022 }
  end
end
