58 lines
1.2 KiB
Elixir
58 lines
1.2 KiB
Elixir
Code.require_file("test_helper.exs", __DIR__)
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defmodule RangeTest do
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use ExUnit.Case, async: true
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doctest Range
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test "precedence" do
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assert Enum.to_list(1..(3 + 2)) == [1, 2, 3, 4, 5]
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assert 1..3 |> Enum.to_list() == [1, 2, 3]
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end
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test "op" do
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assert (1..3).first == 1
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assert (1..3).last == 3
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end
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test "enum" do
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refute Enum.empty?(1..1)
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assert Enum.member?(1..3, 2)
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refute Enum.member?(1..3, 0)
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refute Enum.member?(1..3, 4)
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refute Enum.member?(3..1, 0)
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refute Enum.member?(3..1, 4)
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assert Enum.count(1..3) == 3
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assert Enum.count(3..1) == 3
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assert Enum.map(1..3, &(&1 * 2)) == [2, 4, 6]
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assert Enum.map(3..1, &(&1 * 2)) == [6, 4, 2]
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end
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test "inspect" do
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assert inspect(1..3) == "1..3"
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assert inspect(3..1) == "3..1"
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end
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test "integer only" do
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x = 1.0
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y = 3.0
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message = "ranges (first..last) expect both sides to be integers, got: 1.0..3.0"
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assert_raise ArgumentError, message, fn ->
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Enum.map(x..y, &(&1 * 2))
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end
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first = []
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last = []
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message = "ranges (first..last) expect both sides to be integers, got: []..[]"
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assert_raise ArgumentError, message, fn ->
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first..last
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Enum.map(first..last, & &1)
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end
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end
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end
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