ASTAggregateTest.java

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package org.apache.cayenne.exp.parser;

import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.exp.ExpressionException;
import org.apache.cayenne.exp.ExpressionFactory;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * @since 4.0
 */
public class ASTAggregateTest {

    @Test
    public void testAvgConstruct() throws Exception {
        ASTAvg avg = new ASTAvg(null);
        assertEquals("AVG", avg.getFunctionName());
    }

    @Test(expected = ExpressionException.class)
    public void testAvgEvaluate() throws Exception {
        ASTAvg avg = new ASTAvg(null);
        avg.evaluate(new Object());
    }

    @Test
    public void testAvgParse() throws Exception {
        String expressionString = "avg(artistName)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTAvg);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTObjPath);

        assertEquals(expressionString, exp.toString());
    }

    @Test
    public void testCountConstruct() throws Exception {
        ASTCount count = new ASTCount();
        assertEquals("COUNT", count.getFunctionName());
    }

    @Test
    public void testCountExpParse() throws Exception {
        String expressionString = "count(artistName)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTCount);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTObjPath);

        assertEquals(expressionString, exp.toString());
    }

    @Test
    public void testCountAsteriskParse() throws Exception {
        String expressionString = "count(*)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTCount);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTAsterisk);

        assertEquals(expressionString, exp.toString());
    }

    @Test
    public void testMinConstruct() throws Exception {
        ASTMin min = new ASTMin(null);
        assertEquals("MIN", min.getFunctionName());
    }

    @Test
    public void testMinParse() throws Exception {
        String expressionString = "min(artistName)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTMin);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTObjPath);

        assertEquals(expressionString, exp.toString());
    }

    @Test
    public void testMaxConstruct() throws Exception {
        ASTMax max = new ASTMax(null);
        assertEquals("MAX", max.getFunctionName());
    }

    @Test
    public void testMaxParse() throws Exception {
        String expressionString = "max(artistName)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTMax);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTObjPath);

        assertEquals(expressionString, exp.toString());
    }

    @Test
    public void testSumConstruct() throws Exception {
        ASTSum sum = new ASTSum(null);
        assertEquals("SUM", sum.getFunctionName());
    }

    @Test
    public void testSumParse() throws Exception {
        String expressionString = "sum(artistName)";
        Expression exp = ExpressionFactory.exp(expressionString);
        assertTrue(exp instanceof ASTSum);
        assertEquals(1, exp.getOperandCount());
        assertTrue(exp.getOperand(0) instanceof ASTObjPath);

        assertEquals(expressionString, exp.toString());
    }

}