package solutions.bitbadger.documents

import org.junit.jupiter.api.DisplayName
import org.junit.jupiter.api.Test
import kotlin.test.assertEquals

/**
 * Unit tests for the `ParameterName` class
 */
@DisplayName("ParameterName")
class ParameterNameTest {

    @Test
    @DisplayName("derive works when given existing names")
    fun withExisting() {
        val names = ParameterName()
        assertEquals(":taco", names.derive(":taco"), "Name should have been :taco")
        assertEquals(":field0", names.derive(null), "Counter should not have advanced for named field")
    }

    @Test
    @DisplayName("derive works when given all anonymous fields")
    fun allAnonymous() {
        val names = ParameterName()
        assertEquals(":field0", names.derive(null), "Anonymous field name should have been returned")
        assertEquals(":field1", names.derive(null), "Counter should have advanced from previous call")
        assertEquals(":field2", names.derive(null), "Counter should have advanced from previous call")
        assertEquals(":field3", names.derive(null), "Counter should have advanced from previous call")
    }
}