proverb

elixir/proverb/test/proverb_test.exs

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+defmodule ProverbTest do
+  use ExUnit.Case
+
+  test "zero pieces" do
+    strings = []
+    output = Proverb.recite(strings)
+    expected = ""
+
+    assert output == expected
+  end
+
+  test "one piece" do
+    strings = ["nail"]
+    output = Proverb.recite(strings)
+
+    expected = """
+    And all for the want of a nail.
+    """
+
+    assert output == expected
+  end
+
+  test "two pieces" do
+    strings = ["nail", "shoe"]
+    output = Proverb.recite(strings)
+
+    expected = """
+    For want of a nail the shoe was lost.
+    And all for the want of a nail.
+    """
+
+    assert output == expected
+  end
+
+  test "three pieces" do
+    strings = ["nail", "shoe", "horse"]
+    output = Proverb.recite(strings)
+
+    expected = """
+    For want of a nail the shoe was lost.
+    For want of a shoe the horse was lost.
+    And all for the want of a nail.
+    """
+
+    assert output == expected
+  end
+
+  test "full proverb" do
+    strings = ["nail", "shoe", "horse", "rider", "message", "battle", "kingdom"]
+    output = Proverb.recite(strings)
+
+    expected = """
+    For want of a nail the shoe was lost.
+    For want of a shoe the horse was lost.
+    For want of a horse the rider was lost.
+    For want of a rider the message was lost.
+    For want of a message the battle was lost.
+    For want of a battle the kingdom was lost.
+    And all for the want of a nail.
+    """
+
+    assert output == expected
+  end
+
+  test "four pieces modernized" do
+    strings = ["pin", "gun", "soldier", "battle"]
+    output = Proverb.recite(strings)
+
+    expected = """
+    For want of a pin the gun was lost.
+    For want of a gun the soldier was lost.
+    For want of a soldier the battle was lost.
+    And all for the want of a pin.
+    """
+
+    assert output == expected
+  end
+end

elixir/proverb/test/test_helper.exs

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