public void testConst() {
Assert.assertEquals(100, ExpressionHolder.parse("100"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(100, ExpressionHolder.parse("+100"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(-100, ExpressionHolder.parse("-100"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(1000, ExpressionHolder.parse("1e3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(0.001, ExpressionHolder.parse("1e-3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(1.5, ExpressionHolder.parse("1.5"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(-1.5, ExpressionHolder.parse("-1.5"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(1500, ExpressionHolder.parse("1.5e3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(-0.0015, ExpressionHolder.parse("-1.5e-3"), Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testBad() {
try {
Assert.assertEquals(0, ExpressionHolder.parse("2*(3+4"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertTrue(false);
} catch (ExpressionError ex) {
// good, we want an exception.
}
try {
Assert.assertEquals(0, ExpressionHolder.parse("5+"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertTrue(false);
} catch (ExpressionError ex) {
// good, we want an exception.
}
}
public void testParen() {
Assert.assertEquals(14, ExpressionHolder.parse("2*(3+4)"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(10, ExpressionHolder.parse("(2*3)+4"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(100, ExpressionHolder.parse("(2*3)^2+(4*2)^2"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(4, ExpressionHolder.parse("2^(1+1)"), Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testPower() {
Assert.assertEquals(8, ExpressionHolder.parse("2^3"), Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testMul() {
Assert.assertEquals(6, ExpressionHolder.parse("2*3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(-6, ExpressionHolder.parse("-2*3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(6, ExpressionHolder.parse("-2*-3"), Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testSub() {
Assert.assertEquals(-1, ExpressionHolder.parse("2-3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(7, ExpressionHolder.parse("5--2"), Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testAdd() {
Assert.assertEquals(5, ExpressionHolder.parse("2+3"), Encog.DEFAULT_DOUBLE_EQUAL);
Assert.assertEquals(3, ExpressionHolder.parse("5+-2"), Encog.DEFAULT_DOUBLE_EQUAL);
}