Add stringify tests.

index.js

@@ -80,7 +80,7 @@ function stringify(bemjson, ctx, opts) {
     opts || (opts = {});
     opts.indent || (opts.indent = '    ');
 
-    return stringifyObj(getEntities(bemjson, ctx), opts);
+    return stringifyObj(getEntities(bemjson, ctx).map(entity => entity.toJSON()), opts);
 }
 
 module.exports = {

tests/stringify.js

@@ -0,0 +1,73 @@
+const expect = require('chai').expect;
+const stringify = require('..').stringify;
+
+it('should stringify simple bemjson', () => {
+    expect(stringify({ block: 'button2' })).to.equal(
+`[
+    {
+        block: 'button2'
+    }
+]`);
+
+});
+
+it('should stringify bemjson with several entities', () => {
+    expect(stringify({
+        block: 'button2',
+        content: [
+            { block: 'icon', mods: { type: 'left' }},
+            { block: 'icon', mods: { type: 'right' }}
+        ]})).to.equal(
+`[
+    {
+        block: 'button2'
+    },
+    {
+        block: 'icon'
+    },
+    {
+        block: 'icon',
+        mod: {
+            name: 'type',
+            val: true
+        }
+    },
+    {
+        block: 'icon',
+        mod: {
+            name: 'type',
+            val: 'left'
+        }
+    },
+    {
+        block: 'icon',
+        mod: {
+            name: 'type',
+            val: 'right'
+        }
+    }
+]`);
+
+});
+
+it('should stringify bemjson with ctx', () => {
+    expect(stringify({ elem: 'text' }, { block: 'button2' })).to.equal(
+`[
+    {
+        block: 'button2',
+        elem: 'text'
+    }
+]`);
+
+});
+
+it('should stringify bemjson with stringify opts', () => {
+    expect(stringify({ block: 'button2', elem: 'text' }, null, { indent: '  ' })).to.equal(
+`[
+  {
+    block: 'button2',
+    elem: 'text'
+  }
+]`);
+
+});