92 lines
2.1 KiB
Java
92 lines
2.1 KiB
Java
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package function.builtin.special;
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import static testutil.TestUtilities.evaluateString;
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import static testutil.TypeAssertions.*;
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import org.junit.*;
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import function.ArgumentValidator.*;
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import function.builtin.EVAL.UndefinedSymbolException;
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import table.ExecutionContext;
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public class IFTester {
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private ExecutionContext executionContext;
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public IFTester() {
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this.executionContext = ExecutionContext.getInstance();
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}
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@Before
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public void setUp() {
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executionContext.clearContext();
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}
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@After
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public void tearDown() {
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executionContext.clearContext();
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}
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@Test
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public void ifWithOneExpression_ReturnsExpression() {
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String input = "(if t t)";
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assertT(evaluateString(input));
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}
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@Test
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public void ifWithOneExpression_ReturnsNil() {
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String input = "(if nil t)";
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assertNil(evaluateString(input));
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}
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@Test
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public void ifWithTwoExpressions_ReturnsFirst() {
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String input = "(if t t nil)";
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assertT(evaluateString(input));
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}
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@Test
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public void ifWithTwoExpressions_ReturnsSecond() {
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String input = "(if nil nil t)";
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assertT(evaluateString(input));
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}
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@Test
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public void ifWithNumericConditional() {
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String input = "(if 23 t nil)";
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assertT(evaluateString(input));
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}
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@Test(expected = UndefinedSymbolException.class)
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public void ifWithNilCondition_DoesNotEvaluateThenForm() {
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String input = "(if nil (setf x 22))";
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assertNil(evaluateString(input));
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evaluateString("x");
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}
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@Test(expected = UndefinedSymbolException.class)
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public void ifWithTrueCondition_DoesNotEvaluateElseForm() {
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String input = "(if t nil (setf x 22))";
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assertNil(evaluateString(input));
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evaluateString("x");
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}
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@Test(expected = TooFewArgumentsException.class)
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public void ifWithTooFewArguments() {
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evaluateString("(if t)");
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}
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@Test(expected = TooManyArgumentsException.class)
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public void ifWithTooManyArguments() {
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evaluateString("(if t t t t)");
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}
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}
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