Use of undeclared crate or module with workspaces - rust

Question

I have the following structure:
-- project/
|
|-- Cargo.toml
|-- Cargo.lock
|-- src/
|
|-- main.rs
|-- crate1/
|-- lib.rs
|-- Cargo.toml
|-- tests
|-- Cargo.toml
|-- test.rs
and this are the content of the Cargo.toml
# Cargo.toml
...
[workspace]
members = [
"crate1",
"tests"
]
...
# crate1/Cargo.toml
[package]
name = "crate1"
...
[lib]
path = "lib.rs"
...
here I'm using another lib for my tests, I don't think the problem is here, because I already used this way to do my tests several times, and it worked perfectly, but for some reason, now this is happening to me, I don't know if everything is a typo error of my self or not, but I already checked it a lot of times
# tests/Cargo.tom
[package]
name = "tests"
version = "0.1.0"
edition = "2021"
publish = false
[dev-dependencies]
crate1 = { path = "../crate1" }
[[test]]
name = "crate1_test"
path = "crate1_test.rs"
[[test]]
name = "other_crate1_test"
path = "other_crate1_test.rs"
this is how one of the tests looks like
// tests/crate1_test.rs
use crate1::random_func;
[test]
fn random_func_test() {
assert!(random_func());
}
And for some reason cargo don't recognize the "crate1" crate and throws me this error each time I import the crate:
error[E0433]: failed to resolve: use of undeclared crate or module `crate1`
--> tests/crate1_test.rs:1:5
|
1 | use crate1::random_func;
| ^^^^^^ use of undeclared crate or module `crate1`
For more information about this error, try `rustc --explain E0433`.
error: could not compile `project-manager` due to previous error

Answer 1

I found the problem, it was that I didn't make the crate1 as a dependency of the main project, this is how my root Cargo.toml looks now:
[package]
name = "project"
version = "0.1.0"
edition = "2021"
[workspace]
members = [
"crate1",
"tests"
]
[dependencies]
crate1 = { path = "crate1" }
reqwest = "0.11.13"
tokio = { version = "1", features = ["full"] }
and now I can build my tests correctly

Answer 2

In src/main.rs you have to add mod crate1; and potentially mod tests;