Initial upload

elixir/remote-control-car/test/remote_control_car_test.exs

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+defmodule FakeRemoteControlCar do
+  defstruct battery_percentage: 100,
+            distance_driven_in_meters: 0,
+            nickname: nil
+end
+
+defmodule RemoteControlCarTest do
+  use ExUnit.Case
+
+  @tag task_id: 1
+  test "required key 'nickname' should not have a default value" do
+    assert_raise ArgumentError, fn ->
+      quote do
+        %RemoteControlCar{}
+      end
+      |> Code.eval_quoted()
+    end
+  end
+
+  @tag task_id: 1
+  test "new" do
+    car = RemoteControlCar.new()
+
+    assert car.__struct__ == RemoteControlCar
+    assert car.battery_percentage == 100
+    assert car.distance_driven_in_meters == 0
+    assert car.nickname == "none"
+  end
+
+  @tag task_id: 2
+  test "new with nickname" do
+    nickname = "Red"
+    car = RemoteControlCar.new(nickname)
+
+    assert car.__struct__ == RemoteControlCar
+    assert car.battery_percentage == 100
+    assert car.distance_driven_in_meters == 0
+    assert car.nickname == nickname
+  end
+
+  @tag task_id: 3
+  test "display distance raises error when not given struct" do
+    fake_car = %{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.display_distance(fake_car)
+    end)
+  end
+
+  @tag task_id: 3
+  test "display distance raises error when given unexpected struct" do
+    fake_car = %FakeRemoteControlCar{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.display_distance(fake_car)
+    end)
+  end
+
+  @tag task_id: 3
+  test "display distance of new" do
+    car = RemoteControlCar.new()
+
+    assert RemoteControlCar.display_distance(car) == "0 meters"
+  end
+
+  @tag task_id: 3
+  test "display distance of driven" do
+    car = RemoteControlCar.new()
+    car = %{car | distance_driven_in_meters: 20}
+
+    assert RemoteControlCar.display_distance(car) == "20 meters"
+  end
+
+  @tag task_id: 4
+  test "display battery raises error when not given struct" do
+    fake_car = %{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.display_battery(fake_car)
+    end)
+  end
+
+  @tag task_id: 4
+  test "display battery raises error when given unexpected struct" do
+    fake_car = %FakeRemoteControlCar{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.display_battery(fake_car)
+    end)
+  end
+
+  @tag task_id: 4
+  test "display battery of new" do
+    car = RemoteControlCar.new()
+
+    assert RemoteControlCar.display_battery(car) == "Battery at 100%"
+  end
+
+  @tag task_id: 4
+  test "display battery of dead battery" do
+    car = RemoteControlCar.new()
+    car = %{car | battery_percentage: 0}
+
+    assert RemoteControlCar.display_battery(car) == "Battery empty"
+  end
+
+  @tag task_id: 5
+  test "drive raises error when not given struct" do
+    fake_car = %{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.drive(fake_car)
+    end)
+  end
+
+  @tag task_id: 5
+  test "drive raises error when given unexpected struct" do
+    fake_car = %FakeRemoteControlCar{
+      battery_percentage: 100,
+      distance_driven_in_meters: 0,
+      nickname: "Fake"
+    }
+
+    assert_raise(FunctionClauseError, fn ->
+      RemoteControlCar.drive(fake_car)
+    end)
+  end
+
+  @tag task_id: 5
+  test "drive with battery" do
+    car = RemoteControlCar.new() |> RemoteControlCar.drive()
+
+    assert car.__struct__ == RemoteControlCar
+    assert car.battery_percentage == 99
+    assert car.distance_driven_in_meters == 20
+  end
+
+  @tag task_id: 6
+  test "drive with dead battery" do
+    car =
+      RemoteControlCar.new()
+      |> Map.put(:battery_percentage, 0)
+      |> RemoteControlCar.drive()
+
+    assert car.__struct__ == RemoteControlCar
+    assert car.battery_percentage == 0
+    assert car.distance_driven_in_meters == 0
+  end
+end

elixir/remote-control-car/test/test_helper.exs

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