fix stepper issues

src/tracer/__tests__/__snapshots__/tracer_full.ts.snap

@@ -4604,10 +4604,13 @@ exports[`Builtin math negative numbers as arguments 1`] = `
 [noMarker] Start of evaluation
 
 math_sin(-1);
-[beforeMarker] Math functions must be called with number arguments
+[beforeMarker] math_sin runs
 
-math_sin(-1);
-[noMarker] Evaluation stuck
+-0.8414709848078965;
+[afterMarker] math_sin runs
+
+-0.8414709848078965;
+[noMarker] Evaluation complete
 "
 `;
 
@@ -17600,9 +17603,15 @@ exports[`SOURCE 0 (Tests from previous stepper) math_pow 1`] = `
 [noMarker] Start of evaluation
 
 math_pow(2, 20) || NaN;
-[beforeMarker] Math functions must be called with number arguments
+[beforeMarker] math_pow runs
 
-math_pow(2, 20) || NaN;
+1048576 || NaN;
+[afterMarker] math_pow runs
+
+1048576 || NaN;
+[beforeMarker] Line 2: Expected boolean on left hand side of operation, got number.
+
+1048576 || NaN;
 [noMarker] Evaluation stuck
 "
 `;
@@ -17612,10 +17621,13 @@ exports[`SOURCE 0 (Tests from previous stepper) plus undefined 1`] = `
 [noMarker] Start of evaluation
 
 math_sin(1) + undefined;
-[beforeMarker] Math functions must be called with number arguments
+[beforeMarker] math_sin runs
 
-math_sin(1) + undefined;
-[noMarker] Evaluation stuck
+0.8414709848078965 + undefined;
+[afterMarker] math_sin runs
+
+0.8414709848078965 + undefined;
+[noMarker] Evaluation complete
 "
 `;
 

src/tracer/__tests__/tracer_debug.ts

@@ -95,13 +95,7 @@ test('function calling', () => {
 
 test('general', () => {
   const code = `
-  if (1 !== 1) {
-    2;
-  } else if (2 === 2) {
-    3;  
-  } else {
-    1;
-  }
+  math_sqrt("TEST"); 
   `
   const program = parse(code, { ecmaVersion: 10, locations: true })!
   const steps = getSteps(convert(program), createContext(2), { stepLimit: 200 })

src/tracer/builtins/index.ts

@@ -59,7 +59,7 @@ export function getBuiltinFunction(name: string, args: StepperExpression[]): Ste
       const fn = (Math as any)[mathFnName]
       const argVal = args.map(arg => (arg as StepperLiteral).value)
       argVal.forEach(arg => {
-        if (typeof arg !== 'number' || typeof arg !== 'bigint') {
+        if (typeof arg !== 'number' && typeof arg !== 'bigint') {
           throw new Error('Math functions must be called with number arguments')
         }
       })

src/tracer/nodes/Expression/BinaryExpression.ts

@@ -155,7 +155,7 @@ export class StepperBinaryExpression implements BinaryExpression, StepperBaseNod
 
     let ret = new StepperLiteral(
       value,
-      value !== null ? value.toString() : 'null',
+      typeof value === 'string' ? '"' + value + '"' : value !== null ? value.toString() : 'null',
       undefined,
       undefined,
       this.loc,