testing ternary op

Author: borismarin

src/test/java/expr_parser/parser/test/TernaryTest.java

@@ -0,0 +1,30 @@
+package expr_parser.parser.test;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import expr_parser.visitors.AntlrExpressionParser;
+import expr_parser.visitors.ComparisonEvalVisitor;
+
+public class TernaryTest {
+
+	@Test
+	public void testComparisons() {
+
+		assertEquals(1., evaluate("1<2 ? 1 : 0"), 1e-10);
+		assertEquals(0., evaluate("1>2 ? 1 : 0"), 1e-10);
+		assertEquals(1., evaluate("1<2 and 2<3 ? 1 : 0"), 1e-10);
+		assertEquals(1., evaluate("1<2 or 2>3 ? 1 : 0"), 1e-10);
+		assertEquals(0., evaluate("1>2 or 2>3 ? 1 : 0"), 1e-10);
+		assertEquals(0., evaluate("1>2 and 2>3 ? 1 : 0"), 1e-10);
+
+	}
+
+	private Double evaluate(String expression) {
+		AntlrExpressionParser p = new AntlrExpressionParser(expression);
+		ComparisonEvalVisitor eval = new ComparisonEvalVisitor();
+		return p.parseAndVisitWith(eval).asDouble();
+	}
+
+}