series

elixir/series/test/string_series_test.exs

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+defmodule StringSeriesTest do
+  use ExUnit.Case
+
+  test "slices of size 1 from one" do
+    assert StringSeries.slices("1", 1) == ["1"]
+  end
+
+  test "slices of size 1 from two" do
+    assert StringSeries.slices("12", 1) == ["1", "2"]
+  end
+
+  test "slices of size 1 from more" do
+    assert StringSeries.slices("01234", 1) == ["0", "1", "2", "3", "4"]
+  end
+
+  test "slices of size 2" do
+    assert StringSeries.slices("35", 2) == ["35"]
+  end
+
+  test "slices of size 2 overlap" do
+    assert StringSeries.slices("9142", 2) == ["91", "14", "42"]
+  end
+
+  test "slices of size 2 from more" do
+    assert StringSeries.slices("01234", 2) == ["01", "12", "23", "34"]
+  end
+
+  test "slices of size 3" do
+    assert StringSeries.slices("01234", 3) == ["012", "123", "234"]
+  end
+
+  test "slices of size 4" do
+    assert StringSeries.slices("01234", 4) == ["0123", "1234"]
+  end
+
+  test "slices include duplicates" do
+    assert StringSeries.slices("777777", 3) == ["777", "777", "777", "777"]
+  end
+
+  test "slices of a long series" do
+    assert StringSeries.slices("918493904243", 5) == [
+             "91849",
+             "18493",
+             "84939",
+             "49390",
+             "93904",
+             "39042",
+             "90424",
+             "04243"
+           ]
+  end
+
+  test "slices same size as string" do
+    assert StringSeries.slices("01234", 5) == ["01234"]
+  end
+
+  test "Unicode characters count as a single character" do
+    assert StringSeries.slices("José", 1) == ["J", "o", "s", "é"]
+    assert StringSeries.slices("José", 2) == ["Jo", "os", "sé"]
+  end
+
+  test "slices with size longer than string return empty list" do
+    assert StringSeries.slices("01234", 6) == []
+  end
+
+  test "slices with size zero or negative return empty list" do
+    assert StringSeries.slices("01234", -1) == []
+    assert StringSeries.slices("01234", 0) == []
+  end
+end

elixir/series/test/test_helper.exs

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