test: using const and strictEqual

PR-URL: https://github.com/nodejs/node/pull/9926
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-console-instance.js

@@ -15,7 +15,7 @@ process.stdout.write = process.stderr.write = function() {
 };
 
 // make sure that the "Console" function exists
-assert.equal('function', typeof Console);
+assert.strictEqual('function', typeof Console);
 
 // make sure that the Console constructor throws
 // when not given a writable stream instance
@@ -35,7 +35,7 @@ out.write = err.write = function(d) {};
 var c = new Console(out, err);
 
 out.write = err.write = function(d) {
-  assert.equal(d, 'test\n');
+  assert.strictEqual(d, 'test\n');
   called = true;
 };
 
@@ -48,7 +48,7 @@ c.error('test');
 assert(called);
 
 out.write = function(d) {
-  assert.equal('{ foo: 1 }\n', d);
+  assert.strictEqual('{ foo: 1 }\n', d);
   called = true;
 };
 
@@ -60,10 +60,10 @@ assert(called);
 called = 0;
 out.write = function(d) {
   called++;
-  assert.equal(d, called + ' ' + (called - 1) + ' [ 1, 2, 3 ]\n');
+  assert.strictEqual(d, called + ' ' + (called - 1) + ' [ 1, 2, 3 ]\n');
 };
 [1, 2, 3].forEach(c.log);
-assert.equal(3, called);
+assert.strictEqual(3, called);
 
 // Console() detects if it is called without `new` keyword
 assert.doesNotThrow(function() {