test: verify dist WASM files exist (#3048)

Add test to verify presence of all required WASM files in dist directory:
- tiktoken_bg.wasm for tokenization
- tree-sitter.wasm core parser
- Language-specific tree-sitter WASM files for syntax highlighting

Signed-off-by: Eric Wheeler <[email protected]>
Co-authored-by: Eric Wheeler <[email protected]>

src/__tests__/dist_assets.test.ts

@@ -0,0 +1,57 @@
+import * as fs from "fs"
+import * as path from "path"
+
+describe("dist assets", () => {
+	const distPath = path.join(__dirname, "../../dist")
+
+	describe("tiktoken", () => {
+		it("should have tiktoken wasm file", () => {
+			expect(fs.existsSync(path.join(distPath, "tiktoken_bg.wasm"))).toBe(true)
+		})
+	})
+
+	describe("tree-sitter", () => {
+		const treeSitterFiles = [
+			"tree-sitter-bash.wasm",
+			"tree-sitter-cpp.wasm",
+			"tree-sitter-c_sharp.wasm",
+			"tree-sitter-css.wasm",
+			"tree-sitter-c.wasm",
+			"tree-sitter-elisp.wasm",
+			"tree-sitter-elixir.wasm",
+			"tree-sitter-elm.wasm",
+			"tree-sitter-embedded_template.wasm",
+			"tree-sitter-go.wasm",
+			"tree-sitter-html.wasm",
+			"tree-sitter-javascript.wasm",
+			"tree-sitter-java.wasm",
+			"tree-sitter-json.wasm",
+			"tree-sitter-kotlin.wasm",
+			"tree-sitter-lua.wasm",
+			"tree-sitter-objc.wasm",
+			"tree-sitter-ocaml.wasm",
+			"tree-sitter-php.wasm",
+			"tree-sitter-python.wasm",
+			"tree-sitter-ql.wasm",
+			"tree-sitter-rescript.wasm",
+			"tree-sitter-ruby.wasm",
+			"tree-sitter-rust.wasm",
+			"tree-sitter-scala.wasm",
+			"tree-sitter-solidity.wasm",
+			"tree-sitter-swift.wasm",
+			"tree-sitter-systemrdl.wasm",
+			"tree-sitter-tlaplus.wasm",
+			"tree-sitter-toml.wasm",
+			"tree-sitter-tsx.wasm",
+			"tree-sitter-typescript.wasm",
+			"tree-sitter-vue.wasm",
+			"tree-sitter.wasm",
+			"tree-sitter-yaml.wasm",
+			"tree-sitter-zig.wasm",
+		]
+
+		test.each(treeSitterFiles)("should have %s file", (filename) => {
+			expect(fs.existsSync(path.join(distPath, filename))).toBe(true)
+		})
+	})
+})