43c2bbdd71
For assertions that contain function calls, displaying just the
expression is not helpful. For e.g.
Assertion failed
String.upcase("foo") == "Foo"
The learner is given no extra information to help them learn. Sure they
might consult the documentation (and should!), but perhaps a better
experience would be for us to inform the learner about the values it
encountered.
Assertion failed
String.upcase("foo") == "Foo"
left: "FOO"
right: "Foo"
Learner: 💡 ah hah! it upcases the whole string! 💫
35 lines
759 B
Elixir
35 lines
759 B
Elixir
defmodule Display.Paint do
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def red(str), do: painter().red(str)
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def cyan(str), do: painter().cyan(str)
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def green(str), do: painter().green(str)
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def yellow(str), do: painter.yellow(str)
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defp painter do
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case Mix.env do
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:test -> Display.Uncoloured
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_ -> Display.Colours
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end
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end
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end
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defmodule Display.Colours do
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alias IO.ANSI
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def red(str), do: colourize(ANSI.red, str)
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def cyan(str), do: colourize(ANSI.cyan, str)
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def green(str), do: colourize(ANSI.green, str)
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def yellow(str), do: colourize(ANSI.yellow, str)
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defp colourize(color, message) do
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Enum.join([color, message, ANSI.reset], "")
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end
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end
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defmodule Display.Uncoloured do
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def red(str), do: str
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def cyan(str), do: str
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def green(str), do: str
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end
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