Fixes #97: SQLite is now async, optimized, tests

plugos/sqlite/deno-sqlite/src/wasm.test.ts

@@ -0,0 +1,40 @@
+import {
+  assertEquals,
+  assertThrows,
+} from "https://deno.land/std@0.154.0/testing/asserts.ts";
+
+import { Wasm } from "../build/sqlite.js";
+import * as wasm from "./wasm.ts";
+
+function mock(
+  malloc: () => number = () => 1,
+  free: (pts: number) => void = () => {},
+): Wasm {
+  const memory = new Uint8Array(2048);
+  return {
+    malloc,
+    free,
+    str_len: (ptr: number) => {
+      let len = 0;
+      for (let idx = ptr; memory.at(idx) != 0; idx++) len++;
+      return len;
+    },
+    memory,
+  } as unknown as Wasm;
+}
+
+Deno.test("round trip string", function () {
+  const mockWasm = mock();
+  const testCases = ["Hello world!", "Söme, fünky lëttêrß", "你好👋"];
+  for (const input of testCases) {
+    const output = wasm.setStr(mockWasm, input, (ptr) => {
+      return wasm.getStr(mockWasm, ptr);
+    });
+    assertEquals(input, output);
+  }
+});
+
+Deno.test("throws on allocation error", function () {
+  const mockWasm = mock(() => 0);
+  assertThrows(() => wasm.setStr(mockWasm, "Hello world!", (_) => null));
+});