package math;

import static org.junit.Assert.*;
import org.junit.*;

import math.*;
import stub.*;

public class TestSystem {

	private SystemSolver solver;
	private SystemSolver stubsolver;

	@Before
	public void init() {
    	solver = new SystemSolver();
		stubsolver = new SystemSolver(new LogExprStub(), new TrigExprStub());
	}

	@Test
	public void testTrigRange() {
    	TrigonometricExpression trig = new TrigonometricExpression();
    	Double eps = 0.001;
		assertTrue(solver.solve(-1.0) - trig.eval(-1.0) < eps);
	}

	@Test
	public void testTrigZero() {
		assertTrue(solver.solve(0.0).isNaN());
	}

	@Test
	public void testLog() {
    	LogarithmicExpression log = new LogarithmicExpression();
    	Double eps = 0.001;
		assertTrue(solver.solve(2.0) - log.eval(2.0) < eps);
	}
}