Groovy example source code file (ArithmeticShellTest.groovy)

This example Groovy source code file (ArithmeticShellTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

arithmeticshell, arithmeticshell, arithmeticshelltest, arithmeticshelltest, groovytestcase, number, number, object, object

The Groovy ArithmeticShellTest.groovy source code

/**
* Unit test for ArithmeticShell.
* Requires JUnit to be in path, just like any other GroovyTestCase. 
*
* @author Hamlet D'Arcy
*/
class ArithmeticShellTest extends GroovyTestCase {

    private ArithmeticShell shell

    void setUp() {
        shell = new ArithmeticShell()
    }

    Number evaluate(String text) {
        shell.evaluate(text)
    }

    void testEvaluate_SuccessfulPaths() {
        assert 2.9073548971824276E135 == evaluate("((6L / 2f) - 1) ** 4.5e2")
        assert -6.816387600233341 == evaluate("10 * Math.sin(15/-20)")
        assert 1.0 == evaluate("Math.cos(2*Math.PI)")
        assert 74.17310622494026 == shell.evaluate("80*Math.E**(-(+(11++/40)**2))")
        assert 2147483646 == evaluate("Integer.MAX_VALUE - ++2%2")
        assert 6 == evaluate("++(5)")
        assert 0 == evaluate("5 < 4 ? 1 : 0")
        assert 0 == evaluate("5 != 4 ? 0 : 1")
        assert 0 == evaluate("5 < 4 ?: 0 ")
    }

    void testEvaluate_StaticImportOfMath() {
        assert 6.283185307179586 == evaluate("2*PI")
        assert 0.5403023058681398 == evaluate("cos(1)")
        assert 1.0 == evaluate("cos(2*PI)")
    }

    void testEvaluate_Failures() {
        shouldFail(SecurityException) {
            evaluate("Double.valueOf(\"5\")")
        }

        shouldFail(SecurityException) {
            evaluate("import java.text.DateFormat; 5")
        }

        shouldFail(SecurityException) {
            evaluate("import static java.lang.System.*; 6 * out")
        }

        shouldFail(SecurityException) {
            evaluate("def x = 5+3;x.toString()")
        }

        shouldFail(SecurityException) {
            evaluate("new File();Double.valueOf('5')")
        }

        shouldFail(SecurityException) {
             // without statement whitelist set, this causes the arithmetic shell to
             // enter an infinite loop
             evaluate("while (1);")    
        }

        shouldFail(SecurityException) {
             // without statement whitelist set, security exception is still thrown as it should,
             // but with the error message that closures are not allowed, which may be confusing
             evaluate("for (;;);")
        }

        shouldFail(SecurityException) {
             // without statement whitelist set, no exception is thrown
             evaluate("if (1) 12 else 15")    
        }

        shouldFail(SecurityException) {
             // without expression whitelist set, no exception is thrown
             evaluate("[1,2]; 1")
        }

        shouldFail(SecurityException) {
             // without expression whitelist set, no exception is thrown
             evaluate("[1:2]; 1")
        }

        shouldFail(SecurityException) {
             // without expression whitelist set, no exception is thrown
             evaluate("new Object(); 1")
        }
    }
}