async-mock 0.1.3

Async trait mocking
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

#[async_mock::async_mock]
#[async_trait::async_trait]
trait SomeAsyncTrait {
    async fn foo(&self, x: i32) -> i32;
}

#[tokio::test]
#[should_panic(expected = "Missing returning function for `foo`")]
async fn missing_expectation() {
    let mock = MockSomeAsyncTrait::default();
    _ = mock.foo(3).await;
}

#[tokio::test]
#[should_panic(expected = "Failed expectation for `foo`. Called 1 times but expecting 2.")]
async fn call_count_short() {
    let mut mock = MockSomeAsyncTrait::default();
    mock.expect_foo().times(2).returning(|x| x + 1);
    _ = mock.foo(3).await;
}

#[tokio::test]
#[should_panic(expected = "Failed expectation for `foo`. Called 3 times but expecting 1.")]
async fn call_count_high() {
    let mut mock = MockSomeAsyncTrait::default();
    mock.expect_foo().once().returning(|x| x + 1);
    _ = mock.foo(3).await;
    _ = mock.foo(3).await;
    _ = mock.foo(3).await;
}

#[tokio::test]
#[should_panic(expected = "Missing returning function for `foo`")]
async fn no_returning_set() {
    let mut mock = MockSomeAsyncTrait::default();
    mock.expect_foo().once();
    _ = mock.foo(3).await;
}