Add comparison functions to core env

src/env.js

@@ -8,6 +8,11 @@ module.exports = class Env {
         '-': (a, b) => a - b,
         '*': (a, b) => a * b,
         '/': (a, b) => a / b,
+        '=': (a, b)  => a === b,
+        '>': (a, b)  => a > b,
+        '<': (a, b)  => a < b,
+        '>=': (a, b) => a >= b,
+        '<=': (a, b) => a <= b,
       }
     }
   }

test/coreTest.js

@@ -0,0 +1,21 @@
+const test = require('tape')
+const helpers = require('./helpers')
+
+test('comparison functions', t => {
+  t.plan(5)
+
+  let result = helpers.compile('(= 1 2)')
+  t.equal(result, 'false')
+
+  result = helpers.compile('(> 5 4)')
+  t.equal(result, 'true')
+
+  result = helpers.compile('(< 58 10)')
+  t.equal(result, 'false')
+
+  result = helpers.compile('(>= 5 5)')
+  t.equal(result, 'true')
+
+  result = helpers.compile('(<= 10 10)')
+  t.equal(result, 'true')
+})