Create EventInterface

app/src/test/java/com/vitorpamplona/amethyst/service/zaps/UserZapsTest.kt

@@ -0,0 +1,56 @@
+package com.vitorpamplona.amethyst.service.zaps
+
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.EventInterface
+import com.vitorpamplona.amethyst.service.model.zaps.UserZaps
+import io.mockk.*
+import org.junit.Assert
+import org.junit.Test
+
+class UserZapsTest {
+  @Test
+  fun nothing() {
+    Assert.assertEquals(1, 1)
+  }
+
+  @Test
+  fun user_without_zaps() {
+    val actual = UserZaps.groupByUser(zaps = null)
+
+    Assert.assertEquals(emptyList<Pair<Note, Note>>(), actual)
+  }
+
+  @Test
+  fun group_by_user_with_just_one_user() {
+    val u1 = mockk<Note>()
+    val z1 = mockk<Note>()
+    val z2 = mockk<Note>()
+    val zaps: Map<Note, Note?> = mapOf(u1 to z1, u1 to z2)
+    val actual = UserZaps.groupByUser(zaps)
+
+    Assert.assertEquals(listOf(Pair(u1, z2)), actual)
+  }
+
+  @Test
+  fun group_by_user() {
+    // FIXME: not working yet...
+//    IDEA:
+//    [ (u1 -> z1) (u1 -> z2) (u2 -> z3) ]
+//    [ (u1 -> z1 + z2) (u2 -> z3)]
+    val u1 = mockk<Note>()
+    val u2 = mockk<Note>()
+
+    val z1 = mockk<Note>()
+    val z2 = mockk<Note>()
+    val z3 = mockk<Note>()
+    every { z3.event } returns mockk<EventInterface>()
+
+    val zaps: Map<Note, Note?> = mapOf(u1 to z1, u1 to z2, u2 to z3)
+    val actual = UserZaps.groupByUser(zaps)
+
+    Assert.assertEquals(
+      listOf(Pair(u1, z1), Pair(u1, z2), Pair(u2, z3)),
+      actual
+    )
+  }
+}