[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/string-convert/test/test.index.js

@@ -0,0 +1,11 @@
+var convert = require('../');
+
+describe('string-convert', function () {
+  it('convert.hyphen2camel should convert min-width to minWidth', function () {
+    convert.hyphen2camel('min-width').should.equal('minWidth');
+  });
+  
+  it('convert.camel2hyphen should convert minWidth to min-width', function () {
+    convert.camel2hyphen('minWidth').should.equal('min-width');
+  });
+});