test: add tests for nativeClassProperties

[marco-ippolito]

No description provided.

[robpalme]

The test case is wrong. The desired outcome is for field initializers to remain as field initializers.

I'm guessing the transforms list needs an extra option: useDefineForClassFields: true.

[marco-ippolito]

this is the updated test

test("test native class properties", (t) => {
	const inputCode = `
	class TypeScriptParameterProperties {

    initializedField = this.pp;
    constructor(public pp: any) {
        console.log('finally');
     }
	}`;
	const { code } = transformSync(inputCode, {
		mode: "transform",
		sourceMap: true,
		transform: {
			verbatimModuleSyntax: true,
			nativeClassProperties: true,
			useDefineForClassFields: true,
		},
	});
	console.log(code)
	t.assert.snapshot(code);
});

output:

class TypeScriptParameterProperties {
    pp;
    initializedField;
    constructor(pp){
        this.pp = pp;
        this.initializedField = this.pp;
        console.log('finally');
    }
}

@robpalme is it correct?
I actually noticed that nativeClassProperties is not present in 1.7.11 of the version that we use @kdy1, @magic-akari

[robpalme]

The test output is incorrect. So we're not picking up the desired new behavior yet.

[magic-akari]

The current module relationship is
binding_typescript_wasm -> swc_fast_ts_strip -> swc_ecma_transforms_typescript

Now, the swc_ecma_transforms_typescript module has been updated, but no new version has been released yet,
all dependencies are still referencing the old version.

We may need @kdy1 to explain the compilation and update process.

[robpalme]

@magic-akari do you know if today's @swc/wasm-typescript v1.7.12 contains this new option?

[magic-akari]

@magic-akari do you know if today's @swc/wasm-typescript v1.7.12 contains this new option?

I don't know.

---

There are methods to ensure the use of a local build over crate packages. For details, refer to the script in this CI
https://github.com/swc-project/swc/blob/05961eb018e2e76ed5ef95de9bad923b2fe1df88/.github/workflows/CI.yml#L147-L152

I'm not certain if this is the recommended method.

[marco-ippolito]

maybe @kdy1 knows?

[kdy1]

Sorry, I missed the email. I'll publish swc_ecma_transforms_typescript and swc_fast_ts_strip right away.

[kdy1]

I published those crates and triggered publish of v1.7.14

[marco-ippolito]

thank you!