Elixir: Date and time

🚧 In development

Instructions

🚧 In development

The exercise doesn't pass checking. What to do? 😶

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Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.

In my environment the code works, but not here 🤨

My code is different from the teacher's one 🤔

I've read the lessons but nothing is clear 🙄

Прочитал урок — ничего не понятно 🙄

Found a bug? Have something to add? Pull requests are welcome!

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Your exercise will be checked with these tests:

defmodule Test do
  use ExUnit.Case

  describe "shift_days work" do
    test "with Date" do
      time = Date.utc_today()

      assert Date.add(time, -2) == Solution.shift_days(time, -2)
      assert Date.add(time, 2) == Solution.shift_days(time, 2)
      assert Date.add(time, 1) == Solution.shift_days(time, 1)
      assert Date.add(time, 0) == Solution.shift_days(time, 0)
    end

    test "with NaiveDateTime" do
      time = NaiveDateTime.utc_now()

      assert NaiveDateTime.add(time, days_to_seconds(-2), :second) ==
               Solution.shift_days(time, -2)

      assert NaiveDateTime.add(time, days_to_seconds(2), :second) == Solution.shift_days(time, 2)
      assert NaiveDateTime.add(time, days_to_seconds(1), :second) == Solution.shift_days(time, 1)
      assert NaiveDateTime.add(time, 0, :second) == Solution.shift_days(time, 0)
    end

    test "with DateTime" do
      time = DateTime.utc_now()

      assert DateTime.add(time, days_to_seconds(-2), :second) == Solution.shift_days(time, -2)
      assert DateTime.add(time, days_to_seconds(2), :second) == Solution.shift_days(time, 2)
      assert DateTime.add(time, days_to_seconds(1), :second) == Solution.shift_days(time, 1)
      assert DateTime.add(time, 0, :second) == Solution.shift_days(time, 0)
    end

    test "with Time" do
      time = Time.utc_now()

      assert Time.add(time, days_to_seconds(-2), :second) == Solution.shift_days(time, -2)
      assert Time.add(time, days_to_seconds(2), :second) == Solution.shift_days(time, 2)
      assert Time.add(time, days_to_seconds(1), :second) == Solution.shift_days(time, 1)
      assert Time.add(time, 0, :second) == Solution.shift_days(time, 0)
    end

    defp days_to_seconds(amount) do
      amount * 24 * 60 * 60
    end
  end
end

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Teacher's solution will be available in:

20:00

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