1 files changed, 35 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/tests/log.spec.js b/devtools/client/debugger/src/utils/tests/log.spec.js
new file mode 100644
index 0000000000..ea7e4ca4d2
--- /dev/null
+++ b/devtools/client/debugger/src/utils/tests/log.spec.js
@@ -0,0 +1,35 @@
+/* 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 { prefs } from "../prefs";
+import { log } from "../log.js";
+
+let logArgFirst, logArgSecond, logArgArray;
+
+describe("log()", () => {
+  beforeEach(() => {
+    logArgFirst = "my info";
+    logArgSecond = "my other info";
+    logArgArray = [logArgFirst, logArgSecond];
+    global.console = { log: jest.fn() };
+  });
+
+  afterEach(() => {
+    prefs.logging = false;
+  });
+
+  describe("when logging pref is true", () => {
+    it("prints arguments", () => {
+      prefs.logging = true;
+      log(logArgArray);
+
+      expect(global.console.log).toHaveBeenCalledWith(logArgArray);
+    });
+
+    it("does not print by default", () => {
+      log(logArgArray);
+      expect(global.console.log).not.toHaveBeenCalled();
+    });
+  });
+});