feat: Add Option assertions

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v1.1.0
+
+- Added `Option` assertions: `should.be_some` and `should.be_none`
+
 ## v1.0.2 - 2023-12-19
 
 - Added Gleam v0.33.0 version requirement.

src/gleeunit/should.gleam

@@ -5,6 +5,7 @@
 //// documentation](https://rebar3.org/docs/testing/eunit/).
 
 import gleam/string
+import gleam/option.{type Option, None, Some}
 
 @external(erlang, "gleeunit_ffi", "should_equal")
 pub fn equal(a: t, b: t) -> Nil {
@@ -50,6 +51,20 @@ pub fn be_error(a: Result(a, e)) -> e {
   }
 }
 
+pub fn be_some(a: Option(a)) -> a {
+  case a {
+    Some(value) -> value
+    _ -> panic as string.concat(["\n", string.inspect(a), "\nshould be some"])
+  }
+}
+
+pub fn be_none(a: Option(a)) -> Nil {
+  case a {
+    None -> Nil
+    _ -> panic as string.concat(["\n", string.inspect(a), "\nshould be none"])
+  }
+}
+
 pub fn be_true(actual: Bool) -> Nil {
   actual
   |> equal(True)