nucleotide count + robot simulator solutions elixir

elixir/nucleotide-count/test/nucleotide_count_test.exs

@@ -0,0 +1,37 @@
+defmodule NucleotideCountTest do
+  use ExUnit.Case
+
+  # @tag :pending
+  test "empty dna string has no adenine" do
+    assert NucleotideCount.count('', ?A) == 0
+  end
+
+  @tag :pending
+  test "repetitive cytosine gets counted" do
+    assert NucleotideCount.count('CCCCC', ?C) == 5
+  end
+
+  @tag :pending
+  test "counts only thymine" do
+    assert NucleotideCount.count('GGGGGTAACCCGG', ?T) == 1
+  end
+
+  @tag :pending
+  test "empty dna string has no nucleotides" do
+    expected = %{?A => 0, ?T => 0, ?C => 0, ?G => 0}
+    assert NucleotideCount.histogram('') == expected
+  end
+
+  @tag :pending
+  test "repetitive sequence has only guanine" do
+    expected = %{?A => 0, ?T => 0, ?C => 0, ?G => 8}
+    assert NucleotideCount.histogram('GGGGGGGG') == expected
+  end
+
+  @tag :pending
+  test "counts all nucleotides" do
+    s = 'AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC'
+    expected = %{?A => 20, ?T => 21, ?C => 12, ?G => 17}
+    assert NucleotideCount.histogram(s) == expected
+  end
+end