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gleam_stdlib

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A standard library for the Gleam programming language

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gleam_stdlib gen test gleam@option_test.erl
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gen/test/gleam@option_test.erl 

-module(gleam@option_test).

-compile(no_auto_import).



-export([is_some_test/0, is_none_test/0, to_result_test/0, from_result_test/0, unwrap_option_test/0, map_option_test/0, flatten_option_test/0, then_option_test/0, or_option_test/0]).



-spec is_some_test() -> gleam@should:expectation().

is_some_test() ->

    gleam@should:be_true(gleam@option:is_some({some, 1})),

    gleam@should:be_false(gleam@option:is_some(none)).



-spec is_none_test() -> gleam@should:expectation().

is_none_test() ->

    gleam@should:be_false(gleam@option:is_none({some, 1})),

    gleam@should:be_true(gleam@option:is_none(none)).



-spec to_result_test() -> gleam@should:expectation().

to_result_test() ->

    gleam@should:equal(

        gleam@option:to_result({some, 1}, <<"possible_error"/utf8>>),

        {ok, 1}

    ),

    gleam@should:equal(

        gleam@option:to_result(none, <<"possible_error"/utf8>>),

        {error, <<"possible_error"/utf8>>}

    ).



-spec from_result_test() -> gleam@should:expectation().

from_result_test() ->

    gleam@should:equal(gleam@option:from_result({ok, 1}), {some, 1}),

    gleam@should:equal(

        gleam@option:from_result({error, <<"some_error"/utf8>>}),

        none

    ).



-spec unwrap_option_test() -> gleam@should:expectation().

unwrap_option_test() ->

    gleam@should:equal(gleam@option:unwrap({some, 1}, 0), 1),

    gleam@should:equal(gleam@option:unwrap(none, 0), 0).



-spec map_option_test() -> gleam@should:expectation().

map_option_test() ->

    gleam@should:equal(

        gleam@option:map({some, 1}, fun(X) -> X + 1 end),

        {some, 2}

    ),

    gleam@should:equal(

        gleam@option:map({some, 1}, fun(_) -> <<"2"/utf8>> end),

        {some, <<"2"/utf8>>}

    ),

    gleam@should:equal(gleam@option:map(none, fun(X@1) -> X@1 + 1 end), none).



-spec flatten_option_test() -> gleam@should:expectation().

flatten_option_test() ->

    gleam@should:equal(gleam@option:flatten({some, {some, 1}}), {some, 1}),

    gleam@should:equal(gleam@option:flatten({some, none}), none),

    gleam@should:equal(gleam@option:flatten(none), none).



-spec then_option_test() -> gleam@should:expectation().

then_option_test() ->

    gleam@should:equal(

        gleam@option:then({some, 1}, fun(X) -> {some, X + 1} end),

        {some, 2}

    ),

    gleam@should:equal(

        gleam@option:then({some, 1}, fun(_) -> {some, <<"2"/utf8>>} end),

        {some, <<"2"/utf8>>}

    ),

    gleam@should:equal(

        gleam@option:then(none, fun(X@1) -> {some, X@1 + 1} end),

        none

    ).



-spec or_option_test() -> gleam@should:expectation().

or_option_test() ->

    gleam@should:equal(gleam@option:'or'({some, 1}, {some, 2}), {some, 1}),

    gleam@should:equal(gleam@option:'or'({some, 1}, none), {some, 1}),

    gleam@should:equal(gleam@option:'or'(none, {some, 2}), {some, 2}),

    gleam@should:equal(gleam@option:'or'(none, none), none).