2 files changed, 22 insertions, 0 deletions
diff --git a/test/gleam/float_test.gleam b/test/gleam/float_test.gleam
index 79bece2..be1f22d 100644
--- a/test/gleam/float_test.gleam
+++ b/test/gleam/float_test.gleam
@@ -231,3 +231,14 @@ pub fn square_root_test() {
   float.square_root(-4.0)
   |> should.equal(Error(Nil))
 }
+
+pub fn negate_test() {
+  float.negate(-1.)
+  |> should.equal(1.)
+
+  float.negate(2.)
+  |> should.equal(-2.)
+
+  float.negate(0.)
+  |> should.equal(0.)
+}
diff --git a/test/gleam/int_test.gleam b/test/gleam/int_test.gleam
index bb4648e..4a01073 100644
--- a/test/gleam/int_test.gleam
+++ b/test/gleam/int_test.gleam
@@ -157,3 +157,14 @@ pub fn is_odd_test() {
   int.is_odd(10005)
   |> should.be_true
 }
+
+pub fn negate_test() {
+  int.negate(-1)
+  |> should.equal(1)
+
+  int.negate(2)
+  |> should.equal(-2)
+
+  int.negate(0)
+  |> should.equal(0)
+}