52 lines
1.4 KiB
Java
52 lines
1.4 KiB
Java
package function.builtin.math;
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import function.ArgumentValidator.BadArgumentTypeException;
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import function.ArgumentValidator.TooFewArgumentsException;
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import org.junit.Test;
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import sexpression.LispNumber;
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import testutil.SymbolAndFunctionCleaner;
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import static testutil.TestUtilities.assertSExpressionsMatch;
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import static testutil.TestUtilities.evaluateString;
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public class MinusTest extends SymbolAndFunctionCleaner {
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@Test
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public void minusWithOneNumber() {
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String input = "(- 27)";
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assertSExpressionsMatch(new LispNumber("-27"), evaluateString(input));
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}
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@Test
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public void minusWithTwoNumbers() {
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String input = "(- 5 3)";
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assertSExpressionsMatch(new LispNumber("2"), evaluateString(input));
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}
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@Test
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public void minusWithManyNumbers_PositiveResult() {
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String input = "(- 200 100 10 5)";
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assertSExpressionsMatch(new LispNumber("85"), evaluateString(input));
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}
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@Test
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public void minusWithManyNumbers_NegativeResult() {
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String input = "(- 100 200 20 5)";
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assertSExpressionsMatch(new LispNumber("-125"), evaluateString(input));
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}
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@Test(expected = BadArgumentTypeException.class)
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public void minusWithNonNumber() {
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evaluateString("(- 'a 'b)");
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}
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@Test(expected = TooFewArgumentsException.class)
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public void minusWithTooFewArguments() {
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evaluateString("(-)");
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}
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}
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