Add several elixir solutions

elixir/lucas-numbers/test/lucas_numbers_test.exs

@@ -0,0 +1,112 @@
+defmodule LucasNumbersTest do
+  use ExUnit.Case
+
+  @tag task_id: 1
+  test "generates a sequence of length 1" do
+    assert LucasNumbers.generate(1) == [2]
+  end
+
+  @tag task_id: 1
+  test "generates a sequence of length 2" do
+    assert LucasNumbers.generate(2) == [2, 1]
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 3" do
+    assert LucasNumbers.generate(3) == [2, 1, 3]
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 4" do
+    assert LucasNumbers.generate(4) == [2, 1, 3, 4]
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 5" do
+    sequence = [2, 1, 3, 4, 7]
+
+    assert LucasNumbers.generate(5) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 6" do
+    sequence = [2, 1, 3, 4, 7, 11]
+
+    assert LucasNumbers.generate(6) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 7" do
+    sequence = [2, 1, 3, 4, 7, 11, 18]
+
+    assert LucasNumbers.generate(7) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 8" do
+    sequence = [2, 1, 3, 4, 7, 11, 18, 29]
+
+    assert LucasNumbers.generate(8) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 9" do
+    sequence = [2, 1, 3, 4, 7, 11, 18, 29, 47]
+
+    assert LucasNumbers.generate(9) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 10" do
+    sequence = [2, 1, 3, 4, 7, 11, 18, 29, 47, 76]
+
+    assert LucasNumbers.generate(10) == sequence
+  end
+
+  @tag task_id: 2
+  test "generates a sequence of length 25" do
+    sequence = [
+      2,
+      1,
+      3,
+      4,
+      7,
+      11,
+      18,
+      29,
+      47,
+      76,
+      123,
+      199,
+      322,
+      521,
+      843,
+      1364,
+      2207,
+      3571,
+      5778,
+      9349,
+      15127,
+      24476,
+      39603,
+      64079,
+      103_682
+    ]
+
+    assert LucasNumbers.generate(25) == sequence
+  end
+
+  @tag task_id: 3
+  test "catch incorrect non-integer arguments" do
+    assert_raise ArgumentError, "count must be specified as an integer >= 1", fn ->
+      LucasNumbers.generate("Hello world!")
+    end
+  end
+
+  @tag task_id: 3
+  test "catch incorrect integer arguments" do
+    assert_raise ArgumentError, "count must be specified as an integer >= 1", fn ->
+      LucasNumbers.generate(-1)
+    end
+  end
+end

elixir/lucas-numbers/test/test_helper.exs

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