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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /devtools/client/debugger/src/utils/tests/memoizeLast.spec.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'devtools/client/debugger/src/utils/tests/memoizeLast.spec.js')
-rw-r--r-- | devtools/client/debugger/src/utils/tests/memoizeLast.spec.js | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/tests/memoizeLast.spec.js b/devtools/client/debugger/src/utils/tests/memoizeLast.spec.js new file mode 100644 index 0000000000..a5622510e3 --- /dev/null +++ b/devtools/client/debugger/src/utils/tests/memoizeLast.spec.js @@ -0,0 +1,31 @@ +/* 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 { memoizeLast } from "../memoizeLast"; + +const a = { number: 3 }; +const b = { number: 4 }; + +function add(...numberObjects) { + return numberObjects.reduce((prev, cur) => prev + cur.number, 0); +} + +describe("memozie", () => { + it("should re-calculate when a value changes", () => { + const mAdd = memoizeLast(add); + mAdd(a); + expect(mAdd(a)).toEqual(3); + mAdd(b); + expect(mAdd(b)).toEqual(4); + }); + + it("should only run once", () => { + const mockAdd = jest.fn(add); + const mAdd = memoizeLast(mockAdd); + mAdd(a); + mAdd(a); + + expect(mockAdd.mock.calls[0]).toEqual([{ number: 3 }]); + }); +}); |