1 files changed, 67 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/tests/expressions.spec.js b/devtools/client/debugger/src/utils/tests/expressions.spec.js
new file mode 100644
index 0000000000..b7c91c4e07
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+++ b/devtools/client/debugger/src/utils/tests/expressions.spec.js
@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+import {
+  wrapExpression,
+  getExpressionResultGripAndFront,
+} from "../expressions";
+import { makeMockExpression } from "../test-mockup";
+
+function createError(type, preview) {
+  return makeMockExpression({
+    result: { getGrip: () => ({ class: type, isError: true, preview }) },
+  });
+}
+
+describe("expressions", () => {
+  describe("wrap expression", () => {
+    it("should wrap an expression", () => {
+      expect(wrapExpression("foo")).toMatchSnapshot();
+    });
+
+    it("should wrap expression with a comment", () => {
+      expect(wrapExpression("foo // yo yo")).toMatchSnapshot();
+    });
+
+    it("should wrap quotes", () => {
+      expect(wrapExpression('"2"')).toMatchSnapshot();
+    });
+  });
+
+  describe("sanitize input", () => {
+    it("sanitizes quotes", () => {
+      expect('foo"').toEqual('foo"');
+    });
+
+    it("sanitizes 2 quotes", () => {
+      expect('"3"').toEqual('"3"');
+    });
+
+    it("evaluates \\u{61} as a", () => {
+      expect("\u{61}").toEqual("a");
+    });
+
+    it("evaluates N\\u{61}N as NaN", () => {
+      expect("N\u{61}N").toEqual("NaN");
+    });
+  });
+
+  describe("getValue", () => {
+    it("Reference Errors should be shown as (unavailable)", () => {
+      const { expressionResultGrip } = getExpressionResultGripAndFront(
+        createError("ReferenceError", { name: "ReferenceError" })
+      );
+      expect(expressionResultGrip).toEqual({
+        unavailable: true,
+      });
+    });
+
+    it("Errors messages should be shown", () => {
+      const { expressionResultGrip } = getExpressionResultGripAndFront(
+        createError("Error", { name: "Foo", message: "YO" })
+      );
+      expect(expressionResultGrip).toEqual("Foo: YO");
+    });
+  });
+});