package prolog

import org.junit.jupiter.api.Assertions.assertFalse
import org.junit.jupiter.api.Assertions.assertTrue
import org.junit.jupiter.api.Test
import prolog.components.Program
import prolog.components.expressions.Fact
import prolog.components.terms.Atom

class EvaluationTest {
    @Test
    fun successful_single_clause_program_query() {
        val fact = Fact(Atom("a"))
        Program.load(listOf(fact))

        assertTrue(Program.query(Atom("a")))
    }

    @Test
    fun failing_single_clause_program_query() {
        val fact = Fact(Atom("a"))
        Program.load(listOf(fact))

        assertFalse(Program.query(Atom("b")))
    }
}