TryCF Gist

trycf-gist-1651870440824-0a73cca3-66e8-cd41-7049-852e142159ae.cfm

<cfscript>
function testRest(first, ...rest) {
    return arguments
}


function run() {
    describe("Testing CF's rest operator, eg: function testRest(first, ...rest)", () => {
        describe("Expected behaviour", () => {
            it("combines all latter argument values into one parameter value when using positional arguments", () => {
                actual = testRest("first", "second", "third", "fourth")
                expect(actual).toBe([
                    first = "first",
                    rest = ["second", "third", "fourth"]
                ])
                
                 writeDump(var=actual, label="actual/expected")
            })
            it("combines all latter argument values into one parameter value when using named arguments", () => {
                actual = testRest(first="first", two="second", three="third", four="fourth")
                expect(actual.first).toBe("first")
                expect(actual).toHaveKey("rest")
                expect(actual.rest).toBe({two="second", three="third", four="fourth"})
            })
        })
        
        describe("Actual behaviour", () => {
            it("doesn't work at all with named arguments", () => {
                actual = testRest(first="first", two="second", three="third", four="fourth")
                expect(actual.first).toBe("first")
                expect(actual?.rest).toBeNull()
                expect(actual.keyList().listSort("TEXTNOCASE")).toBe("FIRST,four,REST,three,two")
                
                 writeDump(var=actual, label="actual")
                 writeDump(var={first="first", rest={two="second", three="third", four="fourth"}}, label="expected")
            })
        })
    })
}

tinyTest.runTests()
</cfscript>