if !System.get_env("EXERCISM_TEST_EXAMPLES") do
  Code.load_file("protein_translation.exs", __DIR__)
end

ExUnit.start
ExUnit.configure exclude: :pending, trace: true

defmodule ProteinTranslationTest do
  use ExUnit.Case

  #@tag :pending
  test "AUG translates to methionine" do
    assert ProteinTranslation.of_codon("AUG") == { :ok, "Methionine" }
  end

  @tag :pending
  test "identifies Phenylalanine codons" do
    assert ProteinTranslation.of_codon("UUU") == { :ok, "Phenylalanine" }
    assert ProteinTranslation.of_codon("UUC") == { :ok, "Phenylalanine" }
  end

  @tag :pending
  test "identifies Leucine codons" do
    assert ProteinTranslation.of_codon("UUA") == { :ok, "Leucine" }
    assert ProteinTranslation.of_codon("UUG") == { :ok, "Leucine" }
  end

  @tag :pending
  test "identifies Serine codons" do
    assert ProteinTranslation.of_codon("UCU") == { :ok, "Serine" }
    assert ProteinTranslation.of_codon("UCC") == { :ok, "Serine" }
    assert ProteinTranslation.of_codon("UCA") == { :ok, "Serine" }
    assert ProteinTranslation.of_codon("UCG") == { :ok, "Serine" }
  end

  @tag :pending
  test "identifies Tyrosine codons" do
    assert ProteinTranslation.of_codon("UAU") == { :ok, "Tyrosine" }
    assert ProteinTranslation.of_codon("UAC") == { :ok, "Tyrosine" }
  end

  @tag :pending
  test "identifies Cysteine codons" do
    assert ProteinTranslation.of_codon("UGU") == { :ok, "Cysteine" }
    assert ProteinTranslation.of_codon("UGC") == { :ok, "Cysteine" }
  end

  @tag :pending
  test "identifies Tryptophan codons" do
    assert ProteinTranslation.of_codon("UGG") == { :ok, "Tryptophan" }
  end

  @tag :pending
  test "identifies stop codons" do
    assert ProteinTranslation.of_codon("UAA") == { :ok, "STOP" }
    assert ProteinTranslation.of_codon("UAG") == { :ok, "STOP" }
    assert ProteinTranslation.of_codon("UGA") == { :ok, "STOP" }
  end

  @tag :pending
  test "translates rna strand into correct protein" do
    strand = "AUGUUUUGG"
    assert ProteinTranslation.of_rna(strand) == { :ok, ~w(Methionine Phenylalanine Tryptophan) }
  end

  @tag :pending
  test "stops translation if stop codon present" do
    strand = "AUGUUUUAA"
    assert ProteinTranslation.of_rna(strand) == { :ok, ~w(Methionine Phenylalanine) }
  end

  @tag :pending
  test "stops translation of longer strand" do
    strand = "UGGUGUUAUUAAUGGUUU"
    assert ProteinTranslation.of_rna(strand) == { :ok, ~w(Tryptophan Cysteine Tyrosine) }
  end

  @tag :pending
  test "invalid RNA" do
    assert ProteinTranslation.of_rna("CARROT") == { :error, "invalid RNA" }
  end

  @tag :pending
  test "invalid codon at end of RNA" do
    assert ProteinTranslation.of_rna("UUUROT") == { :error, "invalid RNA" }
  end

  @tag :pending
  test "invalid codon" do
    assert ProteinTranslation.of_codon("INVALID") == { :error, "invalid codon" }
  end
end