refactor!: add reason argument to assert import

examples/basic/test.d.ts

@@ -4,7 +4,7 @@ declare module "main" {
 
 declare module "xtp:test" {
   interface harness {
-    assert(name: PTR, value: I64);
+    assert(name: PTR, value: I64, reason: PTR);
     call(func: PTR, input: PTR): PTR;
     time(func: PTR, input: PTR): I64;
     group(name: PTR);

index.ts

@@ -106,18 +106,25 @@ export class Test {
     return Test.call(funcName, input).readBuffer();
   }
 
-  static assert(msg: string, value: boolean) {
+  static assert(name: string, value: boolean, reason: string) {
     // @ts-ignore: Memory
-    const a = Memory.fromString(msg);
-    assert(a.offset, !!value);
+    const a = Memory.fromString(name);
+    // @ts-ignore: Memory
+    const b = Memory.fromString(reason);
+    assert(a.offset, !!value, b.offset);
     a.free();
+    b.free();
   }
 
   static assertEqual(msg: string, x: unknown, y: unknown) {
-    Test.assert(msg, x === y);
+    const stack = new Error().stack;
+    stack.trim();
+    Test.assert(msg, x === y, `Expected ${x} === ${y}\n${stack}`);
   }
 
   static assertNotEqual(msg: string, x: unknown, y: unknown) {
-    Test.assert(msg, x !== y);
+    const stack = new Error().stack;
+    stack.trim();
+    Test.assert(msg, x !== y, `Expected ${x} !== ${y}\n${stack}`);
   }
 }

test.d.ts

@@ -4,7 +4,7 @@ declare module "main" {
 
 declare module "xtp:test" {
   interface harness {
-    assert(name: PTR, value: I64);
+    assert(name: PTR, value: I64, reason: PTR);
     call(func: PTR, input: PTR): PTR;
     time(func: PTR, input: PTR): I64;
     group(name: PTR);