rpn_calculator

elixir/rpn-calculator/test/rpn_calculator_test.exs

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+defmodule RPNCalculatorTest do
+  use ExUnit.Case
+
+  @tag task_id: 1
+  test "calculate! returns what the operation does: :ok atom" do
+    assert RPNCalculator.calculate!([], fn _ -> :ok end) == :ok
+  end
+
+  @tag task_id: 1
+  test "calculate! returns what the operation does: an ok string" do
+    assert RPNCalculator.calculate!([], fn _ -> "ok" end) == "ok"
+  end
+
+  @tag task_id: 1
+  test "let it crash" do
+    assert_raise(RuntimeError, fn ->
+      RPNCalculator.calculate!([], fn _ -> raise "test error" end)
+    end)
+  end
+
+  @tag task_id: 2
+  test "calculate returns the result of the operation (a string) wrapped in an :ok tuple" do
+    assert RPNCalculator.calculate([], fn _ -> "operation completed" end) ==
+             {:ok, "operation completed"}
+  end
+
+  @tag task_id: 2
+  test "calculate returns the result of the operation (an atom) wrapped in an :ok tuple" do
+    assert RPNCalculator.calculate([], fn _ -> :success end) ==
+             {:ok, :success}
+  end
+
+  @tag task_id: 2
+  test "rescue the crash, no message" do
+    assert RPNCalculator.calculate([], fn _ -> raise "test error" end) == :error
+  end
+
+  @tag task_id: 3
+  test "calculate_verbose returns the result of the operation (a string) wrapped in an :ok tuple" do
+    assert RPNCalculator.calculate_verbose([], fn _ -> "operation completed" end) ==
+             {:ok, "operation completed"}
+  end
+
+  @tag task_id: 3
+  test "calculate_verbose returns the result of the operation (an atom) wrapped in an :ok tuple" do
+    assert RPNCalculator.calculate_verbose([], fn _ -> :success end) ==
+             {:ok, :success}
+  end
+
+  @tag task_id: 3
+  test "rescue the crash, get error tuple with message" do
+    assert RPNCalculator.calculate_verbose([], fn _ -> raise ArgumentError, "test error" end) ==
+             {:error, "test error"}
+  end
+end

elixir/rpn-calculator/test/test_helper.exs

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