/**
 * <p>
 * TrivialTestEngine is a trivial testing framework (duh)
 * that implements an "ok" method similar to perl's.
 * </p><pre>
 * Sample usage: 
 *   testEngine = new TrivialTestEngine();
 *   testEngine.ok(2 == 1 + 1, "two is one plus one");
 *   testEngine.ok(3 > 2, "three is greater than two");
 *   testEngine.ok(3 < 2, "three is less than two");
 *   System.out.println(testEngine.getReport());
 * </pre>
 *
 * @version 1.0, Feb 7 2007
 * @author Jim Mahoney
 */

public class TrivialTestEngine {
    private int successfulTestCount;
    private int failedTestCount;
    private int testCount;
    private String reportMessage;

    public TrivialTestEngine(){
        this.successfulTestCount = this.failedTestCount = this.testCount = 0;
        this.reportMessage = "";
    }

    public void ok(boolean test, String message){
        this.testCount++;
        String okText;
        if (test){
            this.successfulTestCount++;
            okText = "ok ";
        }
        else {
            this.failedTestCount++;
            okText = "not ok ";
        }
        okText += Integer.toString(this.testCount);
        this.reportMessage += String.format("%-16s",okText) + message + "\n";
    }
    public void ok(boolean test){
        ok(test, "");
    }
    public String getReport(){
        String result = "1.." + this.testCount + "\n" + this.reportMessage;
        if (this.failedTestCount == 0 && this.successfulTestCount == this.testCount){
            result += "All tests successful.\n";
        }
        else {
            String plural = this.testCount == 1 ? "" : "s";
            result += "#   Failed " + this.failedTestCount + 
                " and passed " + this.successfulTestCount + 
                " out of " + this.testCount + " test" + plural + ".\n";
        }
        return result;
        
    }
}