tests/* not shipped in crate, resulting in unused [dev-dependencies]

[kentfredric]

[dev-dependencies.automod]
version = "0.1"

[dev-dependencies.rustversion]
version = "0.1"

[dev-dependencies.serde_bytes]
version = "0.11"

[dev-dependencies.serde_derive]
version = "1.0"

[dev-dependencies.serde_stacker]
version = "0.1"

[dev-dependencies.trybuild]
version = "1.0"

$ ls
Cargo.toml  Cargo.toml.orig  LICENSE-APACHE  LICENSE-MIT  README.md  src
$ grep 'automod' -r .
./Cargo.toml.orig:automod = "0.1"
./Cargo.toml:[dev-dependencies.automod]
$ grep 'rustversion' -r .
./Cargo.toml.orig:rustversion = "0.1"
./Cargo.toml:[dev-dependencies.rustversion]
 $ grep 'serde_bytes' -r .
./Cargo.toml.orig:serde_bytes = "0.11"
./src/de.rs:    /// use serde_bytes::ByteBuf;
./src/de.rs:    /// use serde_bytes::ByteBuf;
./Cargo.toml:[dev-dependencies.serde_bytes]
kent@katipo2 ~/.cpanm/work/1571714539.20228/serde_json-1.0.41 $ grep 'serde_derive' -r .
./Cargo.toml.orig:serde_derive = "1.0"
./Cargo.toml:[dev-dependencies.serde_derive]
kent@katipo2 ~/.cpanm/work/1571714539.20228/serde_json-1.0.41 $ grep 'serde_stacker' -r .
./Cargo.toml.orig:serde_stacker = "0.1"
./Cargo.toml.orig:# stack adapter provided by the serde_stacker crate. Additionally you will need
./src/de.rs:    /// growing stack adapter provided by the serde_stacker crate. Additionally
./src/de.rs:    ///     let deserializer = serde_stacker::Deserializer::new(&mut deserializer);
./Cargo.toml:[dev-dependencies.serde_stacker]
$ grep 'trybuild' -r .
./Cargo.toml.orig:trybuild = "1.0"
./Cargo.toml:[dev-dependencies.trybuild]

cargo test
    Updating crates.io index
  Downloaded automod v0.1.2
  Downloaded rustversion v0.1.4
  Downloaded trybuild v1.0.17
  Downloaded toml v0.5.3
   Compiling proc-macro2 v1.0.6
   Compiling unicode-xid v0.2.0
   Compiling syn v1.0.5
   Compiling cc v1.0.46
   Compiling ryu v1.0.2
   Compiling libc v0.2.65
   Compiling serde v1.0.101
   Compiling itoa v0.4.4
   Compiling cfg-if v0.1.10
   Compiling lazy_static v1.4.0
   Compiling glob v0.3.0
   Compiling termcolor v1.0.5
   Compiling psm v0.1.5
   Compiling stacker v0.1.6
   Compiling quote v1.0.2
   Compiling serde_derive v1.0.101
   Compiling rustversion v0.1.4
   Compiling automod v0.1.2
   Compiling toml v0.5.3
   Compiling serde_json v1.0.41
   Compiling serde_bytes v0.11.2
   Compiling serde_json v1.0.41 (./serde_json-1.0.41)
   Compiling serde_stacker v0.1.1
   Compiling trybuild v1.0.17
    Finished dev [unoptimized + debuginfo] target(s) in 1m 38s
     Running target/debug/deps/serde_json-92f70e40abbd2b3f

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

   Doc-tests serde_json

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

This combination of choices is a waste of time for everyone who attempts to run tests on the shipped crate, and makes quality-assurance on published crates nigh impossible.

Granted, some of this exposes inadequacies in cargo, like:

• Discourage optional dependencies turned on by default features rust-lang/api-guidelines#204
• https://internals.rust-lang.org/t/explicit-test-dependency-grade/11107?u=kentnl

But its presently a bug in the crate itself.