Show loading animation while loading elements

[Sone.git] / src / test / kotlin / net / pterodactylus / sone / core / DefaultElementLoaderTest.kt

diff --git a/src/test/kotlin/net/pterodactylus/sone/core/DefaultElementLoaderTest.kt b/src/test/kotlin/net/pterodactylus/sone/core/DefaultElementLoaderTest.kt
new file mode 100644 (file)
index 0000000..adc5bc9
--- /dev/null
+++ b/src/test/kotlin/net/pterodactylus/sone/core/DefaultElementLoaderTest.kt
@@ -0,0 +1,81 @@
+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)
+
+}