[Tests] make a tape helper, to easily compare loose/strict, and (a,b)/(b,a) arg order

Author: ljharb

.eslintrc

@@ -16,6 +16,7 @@
       "files": ["example/**", "test/**"],
       "rules": {
         "array-bracket-newline": 0,
+        "max-params": 0,
         "max-statements": 0,
         "no-console": 0,
         "no-magic-numbers": 0,

package.json

@@ -11,7 +11,7 @@
   "scripts": {
     "pretest": "npm run lint",
     "lint": "eslint .",
-    "tests-only": "tape test/*.js",
+    "tests-only": "tape test/*",
     "test": "npm run tests-only"
   },
   "dependencies": {

test/_tape.js

@@ -0,0 +1,21 @@
+var Test = require('tape/lib/test');
+var is = require('object-is');
+var equal = require('../');
+
+function equalReversed(t, a, b, isEqual, msg, isStrict, skipReversed) {
+  var actual = isStrict ? equal(a, b, { strict: true }) : equal(a, b);
+  var suffix = isEqual ? ' are equal' : ' are not equal';
+  t.equal(actual, !!isEqual, msg + suffix);
+  if (typeof skipReversed === 'boolean' ? !skipReversed : !is(a, b)) {
+    var actualReverse = isStrict ? equal(b, a, { strict: true }) : equal(b, a);
+    t.equal(actualReverse, !!isEqual, msg + suffix + ' (reversed)');
+  }
+}
+function deepEqualTest(t, a, b, msg, isEqual, isStrictEqual, skipReversed) {
+  equalReversed(t, a, b, isEqual, msg, false, skipReversed);
+  equalReversed(t, a, b, isStrictEqual, 'strict: ' + msg, true, skipReversed);
+}
+
+Test.prototype.deepEqualTest = function (a, b, message, isEqual, isStrictEqual, skipReversed) {
+  return deepEqualTest(this, a, b, message, !!isEqual, !!isStrictEqual, skipReversed);
+};