Jenkins not showing Test Result Trend graph for some projects
Test Result Trends does not show up on Job page unless you have at least one successful (100% passed) test run. If you have all test runs as failure till date, it will not show.
Little bit late to the party...
"Test Result Trend" will be shown if you have at least one failed and at least one successful test.
That was the case with NUnit plugin in my Jenkins configuration.