1 files changed, 100 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/exceptions/import-export.js b/js/src/jit-test/tests/wasm/exceptions/import-export.js
new file mode 100644
index 0000000000..fe7646678f
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/exceptions/import-export.js
@@ -0,0 +1,100 @@
+// Tests for Wasm exception import and export.
+
+function testImports() {
+  var mod = `
+    (module
+      (type (func (param i32 i32)))
+      (import "m" "exn" (tag (type 0))))
+ `;
+
+  assertErrorMessage(
+    () => wasmEvalText(mod, { m: { exn: "not a tag" } }),
+    WebAssembly.LinkError,
+    /import object field 'exn' is not a Tag/
+  );
+}
+
+function testExports() {
+  var exports1 = wasmEvalText(`
+    (module (type (func)) (tag (export "exn") (type 0)))
+  `).exports;
+
+  assertEq(typeof exports1.exn, "object");
+  assertEq(exports1.exn instanceof WebAssembly.Tag, true);
+
+  var exports2 = wasmEvalText(`
+    (module
+      (type (func (param i32 i32)))
+      (tag (export "exn") (type 0)))
+  `).exports;
+
+  assertEq(typeof exports2.exn, "object");
+  assertEq(exports2.exn instanceof WebAssembly.Tag, true);
+}
+
+function testImportExport() {
+  var exports = wasmEvalText(`
+    (module
+      (type (func (param i32)))
+      (tag (export "exn") (type 0)))
+  `).exports;
+
+  wasmEvalText(
+    `
+    (module
+      (type (func (param i32)))
+      (import "m" "exn" (tag (type 0))))
+  `,
+    { m: exports }
+  );
+
+  assertErrorMessage(
+    () => {
+      wasmEvalText(
+        `
+      (module
+        (type (func (param)))
+        (import "m" "exn" (tag (type 0))))
+    `,
+        { m: exports }
+      );
+    },
+    WebAssembly.LinkError,
+    /imported tag 'm.exn' signature mismatch/
+  );
+}
+
+// Test imports/exports descriptions.
+function testDescriptions() {
+  const imports = WebAssembly.Module.imports(
+    new WebAssembly.Module(
+      wasmTextToBinary(`
+        (module $m
+          (type (func))
+          (import "m" "e" (tag (type 0))))
+      `)
+    )
+  );
+
+  const exports = WebAssembly.Module.exports(
+    new WebAssembly.Module(
+      wasmTextToBinary(`
+        (module
+          (type (func))
+          (tag (export "e") (type 0)))
+      `)
+    )
+  );
+
+  assertEq(imports[0].module, "m");
+  assertEq(imports[0].name, "e");
+  assertEq(imports[0].kind, "tag");
+
+  assertEq(exports[0].name, "e");
+  assertEq(exports[0].kind, "tag");
+}
+
+testImports();
+testExports();
+testImportExport();
+testDescriptions();