LibJS: Adding two values should convert them to primitives first

1 files changed, 12 insertions, 0 deletions

diff --git a/Libraries/LibJS/Tests/add-values-to-primitive.js b/Libraries/LibJS/Tests/add-values-to-primitive.js
new file mode 100644
index 0000000000..c42f94d4a6
--- /dev/null
+++ b/Libraries/LibJS/Tests/add-values-to-primitive.js
@@ -0,0 +1,12 @@
+load("test-common.js");
+
+try {
+    // Note that these will give different results in the REPL due to parsing behavior.
+    assert([] + [] === "");
+    assert([] + {} === "[object Object]");
+    assert({} + {} === "[object Object][object Object]");
+    assert({} + [] === "[object Object]");
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}