1 files changed, 8 insertions, 0 deletions
diff --git a/Libraries/LibJS/Tests/builtins/Math/Math.tanh.js b/Libraries/LibJS/Tests/builtins/Math/Math.tanh.js
new file mode 100644
index 0000000000..e24dae76c4
--- /dev/null
+++ b/Libraries/LibJS/Tests/builtins/Math/Math.tanh.js
@@ -0,0 +1,8 @@
+test("basic functionality", () => {
+    expect(Math.tanh).toHaveLength(1);
+
+    expect(Math.tanh(0)).toBe(0);
+    expect(Math.tanh(Infinity)).toBe(1);
+    expect(Math.tanh(-Infinity)).toBe(-1);
+    expect(Math.tanh(1)).toBeCloseTo(0.7615941559557649);
+});