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The Test Summary page is accessed either via clicking on the top-level "Tests" in the navigation bar or by selecting the "Test Summary" tab on the left side.
This page provides a comprehensive view of all the tests that belong to a particular project, summarized based on overall totals, Versions, Components and Labels. Clicking on any of these links will take you to the Issue Navigator and display a list of those tests.
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The Test Cycles page is accessed either via clicking on "Plan Test Cycle" or "Execute Tests" in the top-level "Tests". This can also be selected by clicking on the "Test Cycles" tab on the left side.
This page allows you to view test cycles that have been created for a particular version of a project, create new ones, and drill-down into the list of tests for execution. Selecting a different version will change the view and display the test cycles for that selected version. A summary of the execution status is also displayed on the right and hovering over it provides additional stats.
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A test can be created in any one of the ways that any issue type can be created in JIRA. For example, clicking on the "Create Issue" link or "Create Test" link will bring up the following screen:
A test can be viewed in its entirety in the following "View Issue" page (click to enlarge):
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This screen allows you to execute a test by changing its status, filing a new bug or associating an existing one, adding attachments and comments. You can then save and return to the test or the test cycle from where you had come.