resistor_color_trio

elixir/resistor-color-trio/test/resistor_color_trio_test.exs

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+defmodule ResistorColorTrioTest do
+  use ExUnit.Case
+
+  test "Orange and orange and black" do
+    colors = [:orange, :orange, :black]
+    output = ResistorColorTrio.label(colors)
+    expected = {33, :ohms}
+
+    assert output == expected
+  end
+
+  test "Blue and grey and brown" do
+    colors = [:blue, :grey, :brown]
+    output = ResistorColorTrio.label(colors)
+    expected = {680, :ohms}
+
+    assert output == expected
+  end
+
+  test "Red and black and red" do
+    colors = [:red, :black, :red]
+    output = ResistorColorTrio.label(colors)
+    expected = {2, :kiloohms}
+
+    assert output == expected
+  end
+
+  test "Green and brown and orange" do
+    colors = [:green, :brown, :orange]
+    output = ResistorColorTrio.label(colors)
+    expected = {51, :kiloohms}
+
+    assert output == expected
+  end
+
+  test "Yellow and violet and yellow" do
+    colors = [:yellow, :violet, :yellow]
+    output = ResistorColorTrio.label(colors)
+    expected = {470, :kiloohms}
+
+    assert output == expected
+  end
+
+  test "Blue and violet and blue" do
+    colors = [:blue, :violet, :blue]
+    output = ResistorColorTrio.label(colors)
+    expected = {67, :megaohms}
+
+    assert output == expected
+  end
+
+  test "Minimum possible value" do
+    colors = [:black, :black, :black]
+    output = ResistorColorTrio.label(colors)
+    expected = {0, :ohms}
+
+    assert output == expected
+  end
+
+  test "Maximum possible value" do
+    colors = [:white, :white, :white]
+    output = ResistorColorTrio.label(colors)
+    expected = {99, :gigaohms}
+
+    assert output == expected
+  end
+
+  test "First two colors make an invalid octal number" do
+    colors = [:black, :grey, :black]
+    output = ResistorColorTrio.label(colors)
+    expected = {8, :ohms}
+
+    assert output == expected
+  end
+
+  test "Ignore extra colors" do
+    colors = [:blue, :green, :yellow, :orange]
+    output = ResistorColorTrio.label(colors)
+    expected = {650, :kiloohms}
+
+    assert output == expected
+  end
+
+  test "Kilo value" do
+    colors = [:brown, :black, :red]
+    output = ResistorColorTrio.label(colors)
+    expected = {1, :kiloohms}
+
+    assert output == expected
+  end
+
+  test "Mega value" do
+    colors = [:brown, :black, :green]
+    output = ResistorColorTrio.label(colors)
+    expected = {1, :megaohms}
+
+    assert output == expected
+  end
+
+  test "Giga value" do
+    colors = [:brown, :black, :grey]
+    output = ResistorColorTrio.label(colors)
+    expected = {1, :gigaohms}
+
+    assert output == expected
+  end
+end

elixir/resistor-color-trio/test/test_helper.exs

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