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package org.zwobble.couscous.tests;
import org.junit.Test;
import org.zwobble.couscous.ast.ExpressionNode;
import org.zwobble.couscous.ast.TernaryConditionalNode;
import org.zwobble.couscous.values.IntegerValue;
import org.zwobble.couscous.values.PrimitiveValue;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import static org.zwobble.couscous.ast.LiteralNode.literal;
import static org.zwobble.couscous.ast.MethodCallNode.methodCall;
import static org.zwobble.couscous.values.PrimitiveValues.value;
import lombok.val;
public abstract class BackendEvalTests {
@Test
public void canEvaluateLiterals() {
assertEquals(value("hello"), evalExpression(literal("hello")));
assertEquals(value(true), evalExpression(literal(true)));
assertEquals(value(false), evalExpression(literal(false)));
assertEquals(value(42), evalExpression(literal(42)));
}
@Test
public void whenConditionIsTrueThenValueOfConditionalTernaryIsTrueBranch() {
val result = evalExpression(new TernaryConditionalNode(literal(true), literal("T"), literal("F")));
assertEquals(value("T"), result);
}
@Test
public void whenConditionIsFalseThenValueOfConditionalTernaryIsFalseBranch() {
val result = evalExpression(new TernaryConditionalNode(literal(false), literal("T"), literal("F")));
assertEquals(value("F"), result);
}
@Test
public void canCallMethodWithNoArgumentsOnBuiltin() {
val result = evalExpression(methodCall(
literal("hello"),
"length",
asList(),
IntegerValue.REF));
assertEquals(value(5), result);
}
protected abstract PrimitiveValue evalExpression(ExpressionNode expression);
}
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