Add DMAPI triggerable custom events

Closes #1746

tests/DMAPI/BasicOperation/Test.dm

@@ -19,6 +19,21 @@
 	if(!("test" in world_params) || world_params["test"] != "bababooey")
 		FailTest("Expected parameter test=bababooey but did not receive", "test_fail_reason.txt")
 
+	fdel("test_event_output.txt")
+	var/test_data = "nwfiuurhfu"
+	world.TgsTriggerEvent("test_event", list(test_data), TRUE)
+	if(!fexists("test_event_output.txt"))
+		FailTest("Expected test_event_output.txt to exist here", "test_fail_reason.txt")
+
+	var/test_contents = copytext(file2text("test_event_output.txt"), 1, length(test_data) + 1)
+	if(test_contents != test_data)
+		FailTest("Expected test_event_output.txt to contain [test_data] here. Got [test_contents]", "test_fail_reason.txt")
+
+	fdel("test_event_output.txt")
+	world.TgsTriggerEvent("test_event", list("asdf"), FALSE)
+	if(fexists("test_event_output.txt"))
+		FailTest("Expected test_event_output.txt to not exist here", "test_fail_reason.txt")
+
 	world.log << "sleep2"
 	sleep(150)
 	world.log << "Terminating..."

tests/DMAPI/BasicOperation/test_event-qwer.bat

@@ -0,0 +1,7 @@
+echo "Running test_event script"
+
+rem mingw has their own /usr/bin/timeout
+C:\Windows\system32\timeout.exe /t 5
+cd %1
+cd tests\DMAPI\BasicOperation
+echo %2 > test_event_output.txt

tests/DMAPI/BasicOperation/test_event-qwer.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+
+echo "Running test_event script - $1 - $2"
+
+sleep 5
+
+cd $1
+cd tests/DMAPI/BasicOperation
+
+echo $2 > test_event_output.txt
+