How do i verify string content using Mockito in Java -

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i new using mockito test framework. need unit test 1 method return the string content. same contents stored in 1 .js file (i.e. "8.js"). how verify the string contents returned method expected want.

please find below code generating .js file:

public string generatejavascriptcontents(project project)    {        try       {          // creating projectid.js file          fileutils.mkdir(outputdir);          fileoutputstream = new fileoutputstream(outputdir + project.getid() + ".js");          streamwriter = new outputstreamwriter(fileoutputstream, "utf-8");          stringtemplategroup templategroup =             new stringtemplategroup("vitemplates", "/var/vi-xml/template/", defaulttemplatelexer.class);          stringtemplate = templategroup.getinstanceof("standardjstemplate");          stringtemplate.setattribute("projectidval", project.getid());          stringtemplate.setattribute("widthval", project.getdimension().getwidth());          stringtemplate.setattribute("heightval", project.getdimension().getheight());          stringtemplate.setattribute("playerversionval", project.getplayertype().getid());          stringtemplate.setattribute("finaltagpath", finalpathbuilder.tostring());          streamwriter.append(stringtemplate.tostring());          return stringtemplate.tostring();       }       catch (exception e)       {          logger.error("exception occurred while generating standard tag type content", e);          return "";       }     }

the output of above method writes .js file , contents of file looks below:

var projectid = 8;
var playerwidth = 300;
var playerheight = 250;
var player_version = 1;
.....

i have written testmethod() using mockito test this, able write .js file using test method, how verify contents?

can me sort out problem?

as @Łukaszbachman mentions, can read contents js file. there couple of things consider when using approach:

  1. the test slow, have wait js content written disk, read content disk , assert content.
  2. the test theoretically flaky because entire js content may not written disk time code reads file. (on note, should consider calling flush() , close() on outputstreamwriter, if aren't already.)

another approach mock outputstreamwriter , inject method. allow write test code similar following:

outputstreamwriter mockstreamwriter = mock(outputstreamwriter.class); generatejavascriptcontents(mockstreamwriter, project); verify(mockstreamwriter).append("var projectid = 8;\nvar playerwidth = 300;...");

http://mockito.googlecode.com/svn/branches/1.5/javadoc/org/mockito/mockito.html#verify%28t%29


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