Bindings for mockImplementation

[tanabarr]

Bindings for mockImplementation and friends should be added

[jgrund]

Might already have what you're looking for:

fable-jest/test/Matchers.test.fs

Lines 24 to 117 in 26718fa

	test "it should have matcher sugar" <| fun () ->
	let m = Matcher()
	m.Mock "1"
	m <?> "1"
	test "it should have a matcher" <| fun () ->
	let m = Matcher()
	m.Mock (fun () -> ())
	m.CalledWith (expect.any JS.Function)
	test "it should be called with no arguments" <| fun () ->
	let m = Matcher<unit, unit>()
	m.Mock()
	m.LastCalledWith()
	test "it should have a matcher2" <| fun () ->
	let m = Matcher2()
	m.Mock "1" "2"
	m.CalledWith "1" "2"
	test "it should have matcher2 sugar" <| fun () ->
	let m = Matcher2()
	m.Mock "1" "2"
	m <??> ("1", "2")
	test "it should have a matcher3" <| fun () ->
	let m = Matcher3()
	m.Mock "1" "2" "3"
	m.CalledWith "1" "2" "3"
	test "it should track calls for matcher2" <| fun () ->
	expect.assertions 3
	let m = Matcher2()
	m.Mock "0" "1"
	m.Mock "3" "4"
	toEqual m.Calls [|("0", "1"); ("3", "4")|]
	toEqual m.LastCall ("3", "4")
	m.LastCalledWith "3" "4"
	test "it should track calls for matcher3" <| fun () ->
	expect.assertions 3
	let m = Matcher3()
	m.Mock "0" "1" "2"
	m.Mock "3" "4" "5"
	toEqual m.Calls [|("0", "1", "2"); ("3", "4", "5")|]
	toEqual m.LastCall ("3", "4", "5")
	m.LastCalledWith "3" "4" "5"
	test "it should have matcher3 sugar" <| fun () ->
	let m = Matcher3()
	m.Mock "1" "2" "3"
	m <???> ("1", "2", "3")
	test "should work with matching options" <| fun () ->
	expect.assertions 2
	toEqualSome "3" (Some "3")
	toEqualNone None
	describe "mocking external" <| fun () ->
	let mutable Net: obj = null
	let mutable mockMatcher: Matcher<string, float> = null
	beforeEach <| fun () ->
	mockMatcher <- Matcher<string, float>()
	jest.mock("net", fun () ->
	createObj ["isIP" ==> mockMatcher.Mock]
	)
	Net <- Fable.Import.Node.Globals.require.Invoke "net"
	test "should work with mocking external deps" <| fun () ->
	(Net :?> Node.Net.IExports).isIP("foo")
	|> ignore
	toBe "foo" mockMatcher.LastCall

Matcher wraps jest mocks and asserts types align at compile time.

[jgrund]

Would this cover what you're looking for?

[tanabarr]

mocking external looks like what I want, obviously different syntax from Jest docs but should suffice.
can I still mock requirement file as in Jest docs https://facebook.github.io/jest/docs/en/mock-functions.html#mocking-modules