[wasm] Fix test utils and tests

Add a check to appendToTable to catch illegal input, and fix a test
case triggering this check.
Also removing unused variables and fix indentation.

R=ahaas@chromium.org

Change-Id: I0eaa48ab95ef710530a3cfbe94ed4dd419618cda
Reviewed-on: https://chromium-review.googlesource.com/458436
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44027}

test/mjsunit/mjsunit.js

@@ -406,19 +406,18 @@ var failWithMessage;
 
 
   assertThrows = function assertThrows(code, type_opt, cause_opt) {
-    var threwException = true;
     try {
       if (typeof code === 'function') {
         code();
       } else {
         eval(code);
       }
-      threwException = false;
     } catch (e) {
       if (typeof type_opt === 'function') {
         assertInstanceof(e, type_opt);
       } else if (type_opt !== void 0) {
-        failWithMessage("invalid use of assertThrows, maybe you want assertThrowsEquals");
+        failWithMessage(
+            'invalid use of assertThrows, maybe you want assertThrowsEquals');
       }
       if (arguments.length >= 3) {
         assertEquals(e.message, cause_opt);
@@ -426,7 +425,7 @@ var failWithMessage;
       // Success.
       return;
     }
-    failWithMessage("Did not throw exception");
+    failWithMessage('Did not throw exception');
   };
 
 

test/mjsunit/wasm/indirect-calls.js

@@ -74,7 +74,7 @@ module = (function () {
       kExprCallIndirect, sig_i_ii, kTableZero
     ])
     .exportFunc();
-  builder.appendToTable([mul.index, add.index, popcnt.index, main.index]);
+  builder.appendToTable([mul, add.index, popcnt.index, main.index]);
 
   return builder.instantiate({q: {mul: function(a, b) { return a * b | 0; }}});
 })();

test/mjsunit/wasm/wasm-constants.js

@@ -339,25 +339,23 @@ let kTrapMsgs = [
 ];
 
 function assertTraps(trap, code) {
-    var threwException = true;
   try {
     if (typeof code === 'function') {
       code();
     } else {
       eval(code);
     }
-      threwException = false;
   } catch (e) {
-      assertEquals("object", typeof e);
+    assertEquals('object', typeof e);
     assertEquals(kTrapMsgs[trap], e.message);
     // Success.
     return;
   }
-    throw new MjsUnitAssertionError("Did not trap, expected: " + kTrapMsgs[trap]);
+  throw new MjsUnitAssertionError('Did not trap, expected: ' + kTrapMsgs[trap]);
 }
 
 function assertWasmThrows(value, code) {
-    assertEquals("number", typeof(value));
+  assertEquals('number', typeof value);
   try {
     if (typeof code === 'function') {
       code();
@@ -365,10 +363,10 @@ function assertWasmThrows(value, code) {
       eval(code);
     }
   } catch (e) {
-      assertEquals("number", typeof e);
+    assertEquals('number', typeof e);
     assertEquals(value, e);
     // Success.
     return;
   }
-    throw new MjsUnitAssertionError("Did not throw at all, expected: " + value);
+  throw new MjsUnitAssertionError('Did not throw, expected: ' + value);
 }

test/mjsunit/wasm/wasm-module-builder.js

@@ -98,7 +98,8 @@ class WasmFunctionBuilder {
 
   addBody(body) {
     for (let b of body) {
-      if (typeof b != 'number') throw new Error('invalid body: ' + body);
+      if (typeof b != 'number')
+        throw new Error('invalid body (entries have to be numbers): ' + body);
     }
     this.body = body;
     // Automatically add the end for the function block to the body.
@@ -264,6 +265,10 @@ class WasmModuleBuilder {
   }
 
   appendToTable(array) {
+    for (let n of array) {
+      if (typeof n != 'number')
+        throw new Error('invalid table (entries have to be numbers): ' + array);
+    }
     return this.addFunctionTableInit(this.function_table.length, false, array);
   }