Macro k9::assert_matches_snapshot [−][src]
Same as snapshot!() macro, but it takes a string as the only argument and stores the snapshot in a separate file instead of inlining it in the source code of the test.
#[test] fn my_test() { struct A { name: &'a str, age: u32 } let a = A { name: "Lance", age: 9 }; // When first run with `K9_UPDATE_SNAPSHOTS=1` it will // create `__k9_snapshots__/my_test_file/my_test.snap` file // with contents being the serialized value of `a`. // Next time the test is run, if the newly serialized value of a // is different from the value of that snapshot file, the assertion // will fail. assert_matches_snapshot!(a); }