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bugfix: handled acessing last element of an empty queue

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hbarcelos committed Feb 5, 2020
1 parent d67fdf6 commit b478170b61f23b8ac8ed865624cfd22b3f6f68a0
Showing with 10 additions and 0 deletions.
  1. +4 −0 round-linked-queue.js
  2. +6 −0 round-linked-queue.test.js
@@ -25,6 +25,10 @@ class RoundLinkedQueue {
}

get last() {
if (!this._last) {
throw new Error("Cannot access the last element of an empty queue");
}

return this._last.data;
}

@@ -122,5 +122,11 @@ describe("Round-Queue", () => {

expect(() => queue.first).to.throw("Cannot access the first element of an empty queue");
});

it("Should throw a proper error when acessing the last element of an empty queue", () => {
const queue = new RoundQueue(3);

expect(() => queue.last).to.throw("Cannot access the last element of an empty queue");
});
});
});

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