82 lines
2.8 KiB
Java
82 lines
2.8 KiB
Java
package function;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotNull;
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import static org.junit.Assert.assertTrue;
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import static sexpression.Nil.NIL;
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import static testutil.TestUtilities.assertSExpressionsMatch;
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import org.junit.Test;
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import error.ErrorManager;
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import function.ArgumentValidator.TooFewArgumentsException;
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import function.ArgumentValidator.TooManyArgumentsException;
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import function.UserDefinedFunction.IllegalKeywordRestPositionException;
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import sexpression.Cons;
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import sexpression.LispNumber;
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import sexpression.SExpression;
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import sexpression.Symbol;
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public class UserDefinedFunctionTest {
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private static final String FUNCTION_NAME = "TEST";
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private UserDefinedFunction createNoArgumentFunctionThatReturnsNil() {
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return new UserDefinedFunction(FUNCTION_NAME, NIL, new Cons(NIL, NIL));
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}
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private UserDefinedFunction createOneArgumentFunctionThatReturnsArgument() {
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return new UserDefinedFunction(FUNCTION_NAME, new Cons(new Symbol("X"), NIL), new Cons(new Symbol("X"), NIL));
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}
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@Test
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public void nilFunctionCall() {
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UserDefinedFunction function = createNoArgumentFunctionThatReturnsNil();
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assertEquals(NIL, function.call(NIL));
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}
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@Test
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public void nilFunctionToString() {
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UserDefinedFunction function = createNoArgumentFunctionThatReturnsNil();
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Cons expected = new Cons(new Symbol(FUNCTION_NAME), new Cons(NIL, new Cons(NIL, NIL)));
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assertSExpressionsMatch(expected, function.getLambdaExpression());
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}
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@Test
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public void oneArgumentFunction_ReturnsCorrectValue() {
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UserDefinedFunction function = createOneArgumentFunctionThatReturnsArgument();
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SExpression argument = new LispNumber("23");
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Cons argumentList = new Cons(argument, NIL);
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assertSExpressionsMatch(argument, function.call(argumentList));
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}
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@Test(expected = TooManyArgumentsException.class)
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public void oneArgumentFunction_ThrowsExceptionWithTooManyArguments() {
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UserDefinedFunction function = createOneArgumentFunctionThatReturnsArgument();
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SExpression argument = new LispNumber("23");
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Cons argumentList = new Cons(argument, new Cons(argument, NIL));
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function.call(argumentList);
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}
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@Test(expected = TooFewArgumentsException.class)
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public void oneArgumentFunction_ThrowsExceptionWithTooFewArguments() {
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UserDefinedFunction function = createOneArgumentFunctionThatReturnsArgument();
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function.call(NIL);
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}
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@Test
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public void illegalKeywordRestPositionException_HasCorrectAttributes() {
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IllegalKeywordRestPositionException e = new IllegalKeywordRestPositionException(FUNCTION_NAME, NIL);
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assertNotNull(e.getMessage());
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assertTrue(e.getMessage().length() > 0);
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assertEquals(ErrorManager.Severity.ERROR, e.getSeverity());
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}
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}
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