package parser

import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Assertions.assertInstanceOf
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test
import prolog.ast.logic.Fact
import prolog.ast.terms.Atom
import prolog.logic.equivalent
import kotlin.test.assertTrue

class ScriptParserTests {
    private lateinit var parser: ScriptParser

    @BeforeEach
    fun setup() {
        parser = ScriptParser()
    }

    @Test
    fun `parse single atom`() {
        val input = """
            a.
        """.trimIndent()

        val result = parser.parse(input)
        val expected = Fact(Atom("a"))

        assertEquals(1, result.size, "Should return one result")
        assertInstanceOf(Fact::class.java, result[0], "Result should be a fact")
        assertTrue(
            equivalent(expected.head, result[0].head, emptyMap()),
            "Expected fact 'a'"
        )
    }
}