package net.pterodactylus.sone.template

import net.pterodactylus.sone.data.Album
import net.pterodactylus.sone.data.Image
import net.pterodactylus.sone.test.mock
import net.pterodactylus.sone.test.whenever
import org.hamcrest.MatcherAssert.assertThat
import org.hamcrest.Matchers.equalTo
import org.hamcrest.Matchers.nullValue
import org.junit.Before
import org.junit.Test

/**
 * Unit test for [ImageAccessor].
 */
class ImageAccessorTest {

	private val accessor = ImageAccessor()
	private val album = mock<Album>()
	private val images = listOf(mock<Image>(), mock())

	@Before
	fun setupImages() {
		whenever(album.images).thenReturn(images)
		images.forEach {
			whenever(it.album).thenReturn(album)
		}
	}

	@Test
	fun `accessor returns next image for first image`() {
		assertThat(accessor.get(null, images[0], "next"), equalTo<Any>(images[1]))
	}

	@Test
	fun `accessor returns null for next image of second image`() {
		assertThat(accessor.get(null, images[1], "next"), nullValue())
	}

	@Test
	fun `accessor returns previous image for second image`() {
		assertThat(accessor.get(null, images[1], "previous"), equalTo<Any>(images[0]))
	}

	@Test
	fun `accessor returns null for previous image of first image`() {
		assertThat(accessor.get(null, images[0], "previous"), nullValue())
	}

	@Test
	fun `accessor uses reflection accessor for all other members`() {
		assertThat(accessor.get(null, images[0], "hashCode"), equalTo<Any>(images[0].hashCode()))
	}

}