+package net.pterodactylus.sone.core
+
+import com.google.common.io.ByteStreams
+import com.google.common.io.Files
+import freenet.keys.FreenetURI
+import net.pterodactylus.sone.core.FreenetInterface.BackgroundFetchCallback
+import net.pterodactylus.sone.test.capture
+import net.pterodactylus.sone.test.mock
+import org.hamcrest.MatcherAssert
+import org.hamcrest.MatcherAssert.assertThat
+import org.hamcrest.Matchers
+import org.hamcrest.Matchers.`is`
+import org.hamcrest.Matchers.instanceOf
+import org.hamcrest.Matchers.nullValue
+import org.junit.Test
+import org.mockito.ArgumentMatchers.any
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mockito.times
+import org.mockito.Mockito.verify
+import java.io.ByteArrayOutputStream
+
+/**
+ * Unit test for [DefaultElementLoaderTest].
+ */
+class DefaultElementLoaderTest {
+
+ companion object {
+ private const val IMAGE_ID = "KSK@gpl.png"
+ }
+
+ private val freenetInterface = mock<FreenetInterface>()
+ private val elementLoader = DefaultElementLoader(freenetInterface)
+ private val callback = capture<BackgroundFetchCallback>()
+
+ @Test
+ fun `image loader starts request for link that is not known`() {
+ elementLoader.loadElement(IMAGE_ID)
+ verify(freenetInterface).startFetch(eq(FreenetURI(IMAGE_ID)), any<BackgroundFetchCallback>())
+ }
+
+ @Test
+ fun `element loader only starts request once`() {
+ elementLoader.loadElement(IMAGE_ID)
+ elementLoader.loadElement(IMAGE_ID)
+ verify(freenetInterface).startFetch(eq(FreenetURI(IMAGE_ID)), any<BackgroundFetchCallback>())
+ }
+
+ @Test
+ fun `element loader returns loading element on first call`() {
+ assertThat(elementLoader.loadElement(IMAGE_ID).loading, `is`(true))
+ }
+
+ @Test
+ fun `image loader can load image`() {
+ elementLoader.loadElement(IMAGE_ID)
+ verify(freenetInterface).startFetch(eq(FreenetURI(IMAGE_ID)), callback.capture())
+ callback.value.loaded(FreenetURI(IMAGE_ID), "image/png", read("/static/images/unknown-image-0.png"))
+ val linkedElement = elementLoader.loadElement(IMAGE_ID)
+ assertThat(linkedElement.link, `is`(IMAGE_ID))
+ assertThat(linkedElement.loading, `is`(false))
+ assertThat(linkedElement, instanceOf(LinkedImage::class.java))
+ }
+
+ @Test
+ fun `image can be loaded again after it failed`() {
+ elementLoader.loadElement(IMAGE_ID)
+ verify(freenetInterface).startFetch(eq(FreenetURI(IMAGE_ID)), callback.capture())
+ callback.value.failed(FreenetURI(IMAGE_ID))
+ elementLoader.loadElement(IMAGE_ID)
+ verify(freenetInterface, times(2)).startFetch(eq(FreenetURI(IMAGE_ID)), callback.capture())
+ }
+
+ private fun read(resource: String): ByteArray =
+ javaClass.getResourceAsStream(resource)?.use { input ->
+ ByteArrayOutputStream().use {
+ ByteStreams.copy(input, it)
+ it
+ }.toByteArray()
+ } ?: ByteArray(0)
+
+}