[day-05] test imc logic

test/wabanex/imc_test.exs

@@ -0,0 +1,31 @@
+defmodule Wabanex.IMCTest do
+  use ExUnit.Case, async: true
+
+  alias Wabanex.IMC
+
+  describe "calculate/1" do
+    test "when the file exists returns calculated values" do
+      params = %{"filename" => "students.csv"}
+
+      imc = IMC.calculate(params)
+
+      expected_imc = %{
+        "Americo" => 24.508945765204302,
+        "Ana" => 21.30394857667585,
+        "Claudio" => 30.42184964845863,
+        "João" => 31.88775510204082,
+        "Luiz" => 27.777777777777775
+      }
+
+      assert {:ok, expected_imc} == imc
+    end
+
+    test "when the file is unavailable returns an error" do
+      params = %{"filename" => "unavailable.csv"}
+
+      imc = IMC.calculate(params)
+
+      assert {:error, "Error while opening the file"} == imc
+    end
+  end
+end