add t.Integer to standard types

ilizunov · Mar 24, 2016 · 5b79c2c · 5b79c2c
1 parent c0970d4
commit 5b79c2c
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -16,6 +16,7 @@
 
 - **New Feature**
   - Chrome Dev Tools custom formatter for tcomb types
+  - add `t.Integer` to standard types
 
 # v3.0.0
 

diff --git a/index.js b/index.js
@@ -18,6 +18,7 @@ t.Error = require('./lib/Error');
 t.Function = require('./lib/Function');
 t.Nil = require('./lib/Nil');
 t.Number = require('./lib/Number');
+t.Integer = require('./lib/Integer');
 t.Object = require('./lib/Object');
 t.RegExp = require('./lib/RegExp');
 t.String = require('./lib/String');

diff --git a/lib/Integer.js b/lib/Integer.js
@@ -0,0 +1,4 @@
+var refinement = require('./refinement');
+var Number = require('./Number');
+
+module.exports = refinement(Number, function (x) { return x % 1 === 0; }, 'Integer');
diff --git a/test/refinement.js b/test/refinement.js
@@ -112,4 +112,18 @@ describe('t.refinement(type, predicate, [name])', function () {
 
   });
 
+  describe('Integer type', function () {
+
+    it('should type check integers', function () {
+      assert.equal(t.Integer.is(0), true);
+      assert.equal(t.Integer.is(-0), true);
+      assert.equal(t.Integer.is(0.0), true);
+      assert.equal(t.Integer.is(10), true);
+      assert.equal(t.Integer.is(-10), true);
+      assert.equal(t.Integer.is(0.5), false);
+      assert.equal(t.Integer.is(-0.5), false);
+    });
+
+  });
+
 });