1 files changed, 39 insertions, 0 deletions
diff --git a/gen/test/result_test.erl b/gen/test/result_test.erl
new file mode 100644
index 0000000..090a744
--- /dev/null
+++ b/gen/test/result_test.erl
@@ -0,0 +1,39 @@
+-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).