@Test
public void testEvalConst() throws Exception {
Expression expression = Expression.of("92");
int actual = expression.evaluate();
assertEquals(92, actual);
}
@Test
public void testVariableExpression() throws Exception {
Expression.of("foo");
}
@Test
public void testEvaluateInEnvironment() throws Exception {
Map<String, Integer> environment = Collections.singletonMap("x", 92);
Expression expression = Expression.of("x");
assertEquals(92, expression.evaluate(environment));
}
@Test
public void testComplicatedExpression() throws Exception {
Expression expression = Expression.of("((2)+(2 + 2))");
int actual = expression.evaluate();
assertEquals(6, actual);
}
@Test
public void testSumWithParenthesis() throws Exception {
Expression expression = Expression.of("2+(2 + 2)");
int actual = expression.evaluate();
assertEquals(6, actual);
}
@Test
public void testSpacedExpression() throws Exception {
Expression expression = Expression.of("(2 + 2)");
int actual = expression.evaluate();
assertEquals(4, actual);
}
@Test(expected = ParseException.class)
public void testInvalidParenthesis() throws Exception {
Expression.of("((");
}
@Test
public void testScopeInteger() throws Exception {
Expression expression = Expression.of("(42)");
int actual = expression.evaluate();
assertEquals(42, actual);
}