Add several elixir solutions

elixir/new-passport/test/new_passport_test.exs

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+defmodule NewPassportTest do
+  use ExUnit.Case
+
+  describe "getting into the building" do
+    @tag task_id: 1
+    test "building is closed in the morning" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 10:30:00], ~D[1984-09-14], :blue) ==
+               {:error, "city office is closed"}
+    end
+
+    @tag task_id: 1
+    test "building is closed early on Friday afternoon" do
+      assert NewPassport.get_new_passport(~N[2021-10-08 15:00:00], ~D[1984-09-14], :blue) ==
+               {:error, "city office is closed"}
+    end
+
+    @tag task_id: 1
+    test "entering during business hour" do
+      assert {:ok, _} =
+               NewPassport.get_new_passport(~N[2021-10-11 15:00:00], ~D[1984-09-14], :blue)
+    end
+  end
+
+  describe "find the right counter" do
+    @tag task_id: 2
+    test "information staff on coffee break" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:10:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-11 14:25:00]}
+    end
+
+    @tag task_id: 2
+    test "information staff on coffee break, retry at given time" do
+      assert {:ok, _} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:25:00], ~D[1984-09-14], :blue)
+    end
+
+    @tag task_id: 2
+    test "information staff on coffee break on Friday 15 minutes before closing time" do
+      assert NewPassport.get_new_passport(~N[2021-10-08 14:15:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-08 14:30:00]}
+    end
+
+    @tag task_id: 2
+    test "retry after previous attempt, hit closing time" do
+      assert NewPassport.get_new_passport(~N[2021-10-08 14:30:00], ~D[1984-09-14], :blue) ==
+               {:error, "city office is closed"}
+    end
+  end
+
+  describe "get the passport form stamped" do
+    @tag task_id: 3
+    test "illegal form color" do
+      assert NewPassport.get_new_passport(
+               ~N[2021-10-11 14:25:00],
+               ~D[1984-09-14],
+               :orange_and_purple
+             ) == {:error, "wrong form color"}
+    end
+
+    @tag task_id: 3
+    test "wrong form color" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:25:00], ~D[1984-09-14], :red) ==
+               {:error, "wrong form color"}
+    end
+
+    @tag task_id: 3
+    test "correct form color" do
+      assert {:ok, _} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:25:00], ~D[1984-09-14], :blue)
+    end
+  end
+
+  describe "receive the new passport number" do
+    @tag task_id: 4
+    test "get the right timestamp" do
+      assert {:ok, passport_number} =
+               NewPassport.get_new_passport(~N[2021-10-11 13:00:00], ~D[1984-09-14], :blue)
+
+      [timestamp, _counter, _checksum] = String.split(passport_number, "-")
+      assert timestamp == "1633957200"
+    end
+
+    @tag task_id: 4
+    test "get the right timestamp after waiting for coffee break" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:15:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-11 14:30:00]}
+
+      assert {:ok, passport_number} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:30:00], ~D[1984-09-14], :blue)
+
+      [timestamp, _counter, _checksum] = String.split(passport_number, "-")
+      assert timestamp == "1633962600"
+    end
+
+    @tag task_id: 4
+    test "get the right timestamp after waiting twice for coffee break" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:00:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-11 14:15:00]}
+
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:15:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-11 14:30:00]}
+
+      assert {:ok, passport_number} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:30:00], ~D[1984-09-14], :blue)
+
+      [timestamp, _counter, _checksum] = String.split(passport_number, "-")
+      assert timestamp == "1633962600"
+    end
+
+    @tag task_id: 4
+    test "16 year old finds the right counter" do
+      assert {:ok, passport_number} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:30:00], ~D[2005-09-14], :blue)
+
+      [_timestamp, counter, _checksum] = String.split(passport_number, "-")
+      assert counter == "1"
+    end
+
+    @tag task_id: 4
+    test "34 year old finds the right counter" do
+      assert {:ok, passport_number} =
+               NewPassport.get_new_passport(~N[2021-10-11 14:30:00], ~D[1987-09-14], :red)
+
+      [_timestamp, counter, _checksum] = String.split(passport_number, "-")
+      assert counter == "2"
+    end
+
+    @tag task_id: 4
+    test "get the right passport number" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 15:00:00], ~D[1984-09-14], :blue) ==
+               {:ok, "1633964400-3-4901893210"}
+    end
+
+    @tag task_id: 4
+    test "get a passport number after waiting for a coffee break" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:15:00], ~D[1984-09-14], :blue) ==
+               {:retry, ~N[2021-10-11 14:30:00]}
+
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:30:00], ~D[1984-09-14], :blue) ==
+               {:ok, "1633962600-3-4901887810"}
+    end
+
+    @tag task_id: 4
+    test "get a passport number after two coffee breaks" do
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:00:00], ~D[1964-09-14], :red) ==
+               {:retry, ~N[2021-10-11 14:15:00]}
+
+      assert NewPassport.get_new_passport(~N[2021-10-11 14:15:00], ~D[1964-09-14], :red) ==
+               {:retry, ~N[2021-10-11 14:30:00]}
+
+      assert NewPassport.get_new_passport(~N[2021-10-12 14:30:00], ~D[1964-09-14], :red) ==
+               {:ok, "1634049000-4-817024502"}
+    end
+  end
+end

elixir/new-passport/test/test_helper.exs

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+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true, seed: 0)