Test harness running in node

Author: surma

lib/asbind-instance/asbind-instance.js

@@ -30,8 +30,8 @@ async function compileStreaming(source) {
   if (WebAssembly.compileStreaming) {
     return WebAssembly.compileStreaming(source);
   }
-  source = await Promise.resolve(souce);
-  if (source instanceof Response) {
+  source = await Promise.resolve(source);
+  if (typeof Response === "object" && source instanceof Response) {
     source = await source.arrayBuffer();
   }
   return WebAssembly.compile(source);

test/.gitignore

@@ -0,0 +1 @@
+*.wasm

test/test-runner.js

@@ -1,7 +1,13 @@
-const asc = require("assemblyscript/cli/asc");
 const { promisify } = require("util");
-const glob = promisify(require("glob"));
+const fs = require("fs/promises");
+
 const Mocha = require("mocha");
+const assert = require("assert");
+const glob = promisify(require("glob"));
+
+const asc = require("assemblyscript/cli/asc");
+
+globalThis.AsBind = require("../dist/as-bind.cjs.js");
 
 async function main() {
   await asc.ready;
@@ -31,20 +37,29 @@ async function compileAllAsc() {
 async function runTestsInNode() {
   const mocha = new Mocha();
 
-  mocha.globalSetup(() => {
-    console.log("GLOBAL SETUP");
-  });
-
   const testFiles = await glob("./tests/**/test.js");
   for (const testFile of testFiles) {
     mocha.addFile(testFile);
   }
 
+  mocha.globalSetup(() => {
+    this.assert = assert;
+  });
+
+  mocha.rootHooks({
+    async beforeEach() {
+      const { file } = this.currentTest;
+      const wasmFile = file.replace(/test\.js$/, "asc.wasm");
+      this.rawModule = await fs.readFile(wasmFile);
+    }
+  });
+
   const failures = await runMochaAsync(mocha);
   console.log({ failures });
 }
 
-function runMochaAsync(mocha) {
+async function runMochaAsync(mocha) {
+  await mocha.loadFilesAsync();
   return new Promise(resolve => {
     const runner = mocha.run(resolve);
   });

test/tests/arraybufferview/asc.wasm

@@ -1,6 +1,20 @@
 describe("as-bind", function() {
-  it("should handle ArrayBufferViews", function(done) {
-    console.log("AAAH2");
-    done("NAH2");
+  it("should handle Uint8Arrays", async function() {
+    const instance = await AsBind.instantiate(this.rawModule, {
+      asc: {
+        imported(a, b) {
+          const result = new Uint8Array(a.length + b.length);
+          result.set(b, 0);
+          result.set(a, b.length);
+          return result;
+        }
+      }
+    });
+    assert.strictEqual(
+      instance.exports
+        .exported(new Uint8Array([1, 2, 3]), new Uint8Array([10, 11, 12]))
+        .join(","),
+      new Uint8Array([255, 10, 11, 12, 1, 2, 3, 255]).join(",")
+    );
   });
 });

test/tests/arraybufferview/test.js

@@ -1,6 +1,12 @@
 describe("as-bind", function() {
-  it("should handle strings", function(done) {
-    console.log("AAAH");
-    done("NAH");
+  it("should handle strings", async function() {
+    const instance = await AsBind.instantiate(this.rawModule, {
+      asc: {
+        imported(a, b) {
+          return b + a;
+        }
+      }
+    });
+    assert.strictEqual(instance.exports.exported("a", "b"), "!ba!");
   });
 });

test/tests/strings/asc.wasm

@@ -61,7 +61,14 @@ class AsBindTransform extends Transform {
       );
     const importedFunctions = {};
     for (const importedFunction of flatImportedFunctions) {
-      const moduleName = containingModule(importedFunction).internalName;
+      // To know under what module name an imported function will be expected,
+      // we have to find the containing module of the given function, take the
+      // internal name (which is effectively the file path without extension)
+      // and only take the part after the last `/`
+      // (i.e. the file name without extension).
+      const moduleName = containingModule(importedFunction)
+        .internalName.split("/")
+        .slice(-1)[0];
       if (!importedFunctions.hasOwnProperty(moduleName)) {
         importedFunctions[moduleName] = {};
       }