benchmark: provide default methods for assert

The benchmarks for `assert` all take a `method` configuration option,
but the allowable values are different across the files. For each
benchmark, provide an arbitrary default if `method` is set to an empty
string. This allows all the `assert` benchmarks to be run with a single
command but only on a single method. This is primarily useful for
testing that the assert benchmark files don't contain egregious errors.
(In other words, it's useful for testing.)

PR-URL: https://github.com/nodejs/node/pull/15174
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

benchmark/assert/deepequal-buffer.js

@@ -27,6 +27,8 @@ function main(conf) {
   data.copy(expectedWrong);
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual':
       bench.start();
       for (i = 0; i < n; ++i) {

benchmark/assert/deepequal-map.js

@@ -46,6 +46,8 @@ function main(conf) {
   var values, values2;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual_primitiveOnly':
       values = array.map((_, i) => [`str_${i}`, 123]);
       benchmark(assert.deepEqual, n, values);

benchmark/assert/deepequal-object.js

@@ -37,6 +37,8 @@ function main(conf) {
   const expectedWrong = createObj(source, '4');
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual':
       bench.start();
       for (i = 0; i < n; ++i) {

benchmark/assert/deepequal-prims-and-objs-big-array-set.js

@@ -53,6 +53,8 @@ function main(conf) {
   const expectedWrongSet = new Set(expectedWrong);
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual_Array':
       bench.start();
       for (i = 0; i < n; ++i) {

benchmark/assert/deepequal-prims-and-objs-big-loop.js

@@ -34,6 +34,8 @@ function main(conf) {
 
   // Creates new array to avoid loop invariant code motion
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual':
       bench.start();
       for (i = 0; i < n; ++i) {

benchmark/assert/deepequal-set.js

@@ -47,6 +47,8 @@ function main(conf) {
   var values, values2;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual_primitiveOnly':
       values = array.map((_, i) => `str_${i}`);
       benchmark(assert.deepEqual, n, values);

benchmark/assert/deepequal-typedarrays.js

@@ -38,6 +38,8 @@ function main(conf) {
   var i;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'deepEqual':
       bench.start();
       for (i = 0; i < n; ++i) {

benchmark/assert/throws.js

@@ -22,6 +22,8 @@ function main(conf) {
   var i;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'doesNotThrow':
       bench.start();
       for (i = 0; i < n; ++i) {