Add some unit test for the command parser.

Not all commands are covered, could add more tests later.

vector/src/test/java/im/vector/app/features/command/CommandParserTest.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 im.vector.app.features.command
+
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.Test
+
+class CommandParserTest {
+    @Test
+    fun parseSlashCommandEmpty() {
+        test("/", ParsedCommand.ErrorEmptySlashCommand)
+    }
+
+    @Test
+    fun parseSlashCommandUnknown() {
+        test("/unknown", ParsedCommand.ErrorUnknownSlashCommand("/unknown"))
+        test("/unknown with param", ParsedCommand.ErrorUnknownSlashCommand("/unknown"))
+    }
+
+    @Test
+    fun parseSlashCommandNotACommand() {
+        test("", ParsedCommand.ErrorNotACommand)
+        test("test", ParsedCommand.ErrorNotACommand)
+        test("// test", ParsedCommand.ErrorNotACommand)
+    }
+
+    @Test
+    fun parseSlashCommandEmote() {
+        test("/me test", ParsedCommand.SendEmote("test"))
+        test("/me", ParsedCommand.ErrorSyntax(Command.EMOTE))
+    }
+
+    @Test
+    fun parseSlashCommandRemove() {
+        // Nominal
+        test("/remove @foo:bar", ParsedCommand.RemoveUser("@foo:bar", null))
+        // With a reason
+        test("/remove @foo:bar a reason", ParsedCommand.RemoveUser("@foo:bar", "a reason"))
+        // Trim the reason
+        test("/remove @foo:bar    a    reason    ", ParsedCommand.RemoveUser("@foo:bar", "a    reason"))
+        // Alias
+        test("/kick @foo:bar", ParsedCommand.RemoveUser("@foo:bar", null))
+        // Error
+        test("/remove", ParsedCommand.ErrorSyntax(Command.REMOVE_USER))
+    }
+
+    private fun test(message: String, expectedResult: ParsedCommand) {
+        val commandParser = CommandParser()
+        val result = commandParser.parseSlashCommand(message)
+        result shouldBeEqualTo expectedResult
+    }
+}