public void testDivideByZero() throws Exception {
trans._formula = "(FOO + BAR) / baz";
trans.init();
assertFormulaResult(null, 10, 10, 0);
assertFormulaResult(null, -10, -10, 0);
assertFormulaResult(null, 0, 0, 0);
}
public void testColumnAliases() throws Exception {
foo.setName("hello world");
bar.setName("lorem ipsum");
trans._formula = "(helloworld + lorem_ipsum) / col3";
trans.init();
assertFormulaResult(2.0, 10, 10, 10);
assertFormulaResult(10.0, 10, 10, 2);
assertFormulaResult(5.0, 0, 10, 2);
}
public void testVanilla() throws Exception {
trans._formula = "(FOO + BAR) / baz";
trans.init();
assertFormulaResult(2.0, 10, 10, 10);
assertFormulaResult(10.0, 10, 10, 2);
assertFormulaResult(5.0, 0, 10, 2);
trans._formula = "(FOO + BAR) % baz";
trans.init();
assertFormulaResult(0, 0, 10, 2);
assertFormulaResult(4, 3, 11, 5);
}
@Override
@SuppressWarnings("unchecked")
protected void setUp() throws Exception {
foo = new MockInputColumn<Number>("foo");
bar = new MockInputColumn<Number>("BAR");
baz = new MockInputColumn<Number>("baz");
trans = new MathFormulaTransformer();
trans._input = new InputColumn[] {foo, bar, baz};
}
private void assertFormulaResult(Number result, Integer fo, Integer br, Integer bz) {
Number[] arr = trans.transform(new MockInputRow().put(foo, fo).put(bar, br).put(baz, bz));
assertNotNull(arr);
assertEquals(1, arr.length);
if (result == null) {
assertNull("Expected null but got: " + arr[0], arr[0]);
} else {
if (arr[0] == null) {
fail("Expected " + result + " but got null!");
}
double d1 = result.doubleValue();
double d2 = arr[0].doubleValue();
assertEquals(d1, d2);
}
}
public void testNullVariables() throws Exception {
trans._formula = "(FOO + BAR) / baz";
trans.init();
assertFormulaResult(1.0, null, 10, 10);
}