swift-package: unable to add json to the package manifest - swift

Question

I just can't believe how unintuitive this process is and how complicated and convoluted #apple has made this normally simple process.
I've been spending the past 2 hours trying to add a test suite json file for some offline tests on my new package. I tried looking at the official apple way and another source on the internet but nothing works.
I'm just trying to add the following:
.target(
name: "testJSON",
resources: [
.copy("test.json")
]
)
In the package manifest, which is below:
let package = Package(
name: "SwiftHorizons",
products: [
// Products define the executables and libraries a package produces, and make them visible to other packages.
.library(
name: "SwiftHorizons",
targets: ["SwiftHorizons"]),
],
dependencies: [
// Dependencies declare other packages that this package depends on.
// .package(url: /* package url */, from: "1.0.0"),
],
targets: [
// Targets are the basic building blocks of a package. A target can define a module or a test suite.
// Targets can depend on other targets in this package, and on products in packages this package depends on.
.target(
name: "SwiftHorizons",
dependencies: []),
.testTarget(
name: "SwiftHorizonsTests",
dependencies: ["SwiftHorizons"]),
]
)
The file is in the sources folder at the moment. I tried putting it in the test folder, just the file itself, everywhere. None work, either give me an error message or none but when running the test suite, 0 tests are run.
This is the most stupid non work morning I have ever experienced with an apple product.