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-module(result_test).
-compile(no_auto_import).
-export([is_ok_test/0, is_error_test/0, map_test/0, map_error_test/0, flatten_test/0, then_test/0, unwrap_test/0]).
is_ok_test() ->
expect:true(result:is_ok({ok, 1})),
expect:false(result:is_ok({error, 1})).
is_error_test() ->
expect:false(result:is_error({ok, 1})),
expect:true(result:is_error({error, 1})).
map_test() ->
expect:equal(result:map({ok, 1}, fun(X) -> X + 1 end), {ok, 2}),
expect:equal(result:map({ok, 1}, fun(_) -> <<"2">> end), {ok, <<"2">>}),
expect:equal(result:map({error, 1}, fun(X) -> X + 1 end), {error, 1}).
map_error_test() ->
expect:equal(result:map_error({ok, 1}, fun(X) -> X + 1 end), {ok, 1}),
expect:equal(result:map_error({error, 1}, fun(X) -> X + 1 end), {error, 2}).
flatten_test() ->
expect:equal(result:flatten({ok, {ok, 1}}), {ok, 1}),
expect:equal(result:flatten({ok, {error, 1}}), {error, 1}),
expect:equal(result:flatten({error, 1}), {error, 1}),
expect:equal(result:flatten({error, {error, 1}}), {error, {error, 1}}).
then_test() ->
expect:equal(result:then({error, 1}, fun(X) -> {ok, X + 1} end),
{error, 1}),
expect:equal(result:then({ok, 1}, fun(X) -> {ok, X + 1} end), {ok, 2}),
expect:equal(result:then({ok, 1}, fun(_) -> {ok, <<"type change">>} end),
{ok, <<"type change">>}),
expect:equal(result:then({ok, 1}, fun(_) -> {error, 1} end), {error, 1}).
unwrap_test() ->
expect:equal(result:unwrap({ok, 1}, 50), 1),
expect:equal(result:unwrap({error, <<"nope">>}, 50), 50).
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