From 626b1d6a5d9cd7dddb967e859050858cbfbc0b79 Mon Sep 17 00:00:00 2001
From: Him188 <Him188@mamoe.net>
Date: Sat, 25 Apr 2020 13:13:18 +0800
Subject: [PATCH] Add tests for `Message.isContentEmpty()`

---
 .../net.mamoe.mirai/message/data/Message.kt   |  2 +-
 .../mirai/message.data/MessageUtilsTest.kt    | 25 +++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/MessageUtilsTest.kt

diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt
index d7dd4afea..26759c053 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt
@@ -280,7 +280,7 @@ interface Message { // must be interface. Don't consider any changes.
 fun Message.isContentEmpty(): Boolean = when (this) {
     is MessageMetadata -> true
     is PlainText -> this.isEmpty()
-    is MessageChain -> this.any { it.isContentEmpty() }
+    is MessageChain -> this.all { it.isContentEmpty() }
     else -> false
 }
 
diff --git a/mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/MessageUtilsTest.kt b/mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/MessageUtilsTest.kt
new file mode 100644
index 000000000..8c618a886
--- /dev/null
+++ b/mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/MessageUtilsTest.kt
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2020 Mamoe Technologies and contributors.
+ *
+ * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
+ * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
+ *
+ * https://github.com/mamoe/mirai/blob/master/LICENSE
+ */
+
+package net.mamoe.mirai.message.data
+
+import kotlin.test.Test
+import kotlin.test.assertTrue
+
+
+internal class MessageUtilsTest {
+    @Test
+    fun testIsContentEmpty() {
+        assertTrue { EmptyMessageChain.isContentEmpty() }
+        assertTrue { buildMessageChain { }.isContentEmpty() }
+        assertTrue { PlainText("").isContentEmpty() }
+        assertTrue { (PlainText("") + PlainText("")).isContentEmpty() }
+        assertTrue { buildMessageChain { append(PlainText("")); append(PlainText("")) }.isContentEmpty() }
+    }
+}
\ No newline at end of file