feat!: make a project using mix

test/test_helper.exs

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+ExUnit.start()

test/todo/csvimporter_test.exs

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+defmodule Todo.TestCSVImporter do
+  use ExUnit.Case
+  alias Todo.CSVImporter
+  alias Todo.List
+
+  test "simple correct csv" do
+    file_path = Path.join(__DIR__, "./files/todo_list.csv")
+    list = CSVImporter.import(file_path)
+
+    assert [
+             %{date: ~D[2024-12-19], title: "Dentist"},
+             %{date: ~D[2024-12-19], title: "Movies"}
+           ] = List.entries(list, ~D[2024-12-19])
+
+    assert [
+             %{date: ~D[2024-12-20], title: "Shopping"}
+           ] = List.entries(list, ~D[2024-12-20])
+  end
+end

test/todo/files/todo_list.csv

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+2024-12-19,Dentist
+2024-12-20,Shopping
+2024-12-19,Movies

test/todo/list_test.exs

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+defmodule Todo.TestList do
+  use ExUnit.Case
+  alias Todo.List
+
+  test "simple usage" do
+    list = List.new()
+    assert [] = List.entries(list, ~D[2024-08-04])
+
+    list = List.add(list, %{date: ~D[2024-08-04], title: "Write some Elixir"})
+
+    assert [%{date: ~D[2024-08-04], title: "Write some Elixir"}] =
+             List.entries(list, ~D[2024-08-04])
+  end
+
+  test "id starts at 1 and increases by 1" do
+    list = List.new()
+    list = List.add(list, %{date: ~D[2024-08-04], title: "Write some Elixir"})
+
+    assert [%{date: ~D[2024-08-04], title: "Write some Elixir", id: 1}] =
+             List.entries(list, ~D[2024-08-04])
+
+    list = List.add(list, %{date: ~D[2024-08-04], title: "Write more Elixir"})
+
+    assert [
+             %{date: ~D[2024-08-04], title: "Write some Elixir", id: 1},
+             %{date: ~D[2024-08-04], title: "Write more Elixir", id: 2}
+           ] =
+             List.entries(list, ~D[2024-08-04])
+  end
+
+  test "new/1 has expected elements" do
+    list =
+      List.new([
+        %{date: ~D[2024-08-04], title: "Write some Elixir"},
+        %{date: ~D[2024-08-04], title: "Write more Elixir"}
+      ])
+
+    assert [
+             %{date: ~D[2024-08-04], title: "Write some Elixir"},
+             %{date: ~D[2024-08-04], title: "Write more Elixir"}
+           ] =
+             List.entries(list, ~D[2024-08-04])
+  end
+
+  test "entries returns correct dates" do
+    list =
+      List.new([
+        %{date: ~D[2024-08-03], title: "Prepare writing Elixir"},
+        %{date: ~D[2024-08-04], title: "Write some Elixir"},
+        %{date: ~D[2024-08-05], title: "Pause writing Elixir"},
+        %{date: ~D[2024-08-04], title: "Write more Elixir"}
+      ])
+
+    assert [%{date: ~D[2024-08-04]}, %{date: ~D[2024-08-04]}] = List.entries(list, ~D[2024-08-04])
+  end
+
+  test "update/3 updates selected entry" do
+    list =
+      List.new([
+        %{date: ~D[2024-08-04], title: "Write some Elixir"},
+        %{date: ~D[2024-08-04], title: "Write more Elixir"}
+      ])
+
+    updated =
+      List.update(list, 1, fn %{title: title} = entry ->
+        %{entry | title: String.upcase(title)}
+      end)
+
+    assert [
+             %{date: ~D[2024-08-04], title: "WRITE SOME ELIXIR"},
+             %{date: ~D[2024-08-04], title: "Write more Elixir"}
+           ] =
+             List.entries(updated, ~D[2024-08-04])
+  end
+
+  test "delete/2" do
+    list =
+      List.new([
+        %{date: ~D[2024-08-04], title: "Write some Elixir"},
+        %{date: ~D[2024-08-04], title: "Write more Elixir"}
+      ])
+
+    new_list = List.delete(list, 2)
+
+    assert [
+             %{date: ~D[2024-08-04], title: "Write some Elixir"}
+           ] = List.entries(new_list, ~D[2024-08-04])
+  end
+end