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-rw-r--r--test/gleam/option_test.gleam14
1 files changed, 14 insertions, 0 deletions
diff --git a/test/gleam/option_test.gleam b/test/gleam/option_test.gleam
index edbb569..03f4186 100644
--- a/test/gleam/option_test.gleam
+++ b/test/gleam/option_test.gleam
@@ -54,3 +54,17 @@ pub fn map_option_test() {
|> option.map(fn(x) { x + 1 })
|> should.equal(None)
}
+
+pub fn flatten_option_test() {
+ Some(Some(1))
+ |> option.flatten()
+ |> should.equal(Some(1))
+
+ Some(None)
+ |> option.flatten()
+ |> should.equal(None)
+
+ None
+ |> option.flatten()
+ |> should.equal(None)
+}