1 files changed, 63 insertions, 0 deletions
diff --git a/okio/src/commonTest/kotlin/okio/MockSink.kt b/okio/src/commonTest/kotlin/okio/MockSink.kt
new file mode 100644
index 00000000..7e099f42
--- /dev/null
+++ b/okio/src/commonTest/kotlin/okio/MockSink.kt
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2014 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package okio
+
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+/** A scriptable sink. Like Mockito, but worse and requiring less configuration.  */
+class MockSink : Sink {
+  private val log = mutableListOf<String>()
+  private val callThrows = mutableMapOf<Int, IOException>()
+
+  fun assertLog(vararg messages: String) {
+    assertEquals(messages.toList(), log)
+  }
+
+  fun assertLogContains(message: String) {
+    assertTrue(message in log)
+  }
+
+  fun scheduleThrow(call: Int, e: IOException) {
+    callThrows[call] = e
+  }
+
+  private fun throwIfScheduled() {
+    val exception = callThrows[log.size - 1]
+    if (exception != null) throw exception
+  }
+
+  override fun write(source: Buffer, byteCount: Long) {
+    log.add("write($source, $byteCount)")
+    source.skip(byteCount)
+    throwIfScheduled()
+  }
+
+  override fun flush() {
+    log.add("flush()")
+    throwIfScheduled()
+  }
+
+  override fun timeout(): Timeout {
+    log.add("timeout()")
+    return Timeout.NONE
+  }
+
+  override fun close() {
+    log.add("close()")
+    throwIfScheduled()
+  }
+}