Added test for fileExists:

Johan Brichau · Johan Brichau · commit ba95d23ba127 · 2021-09-23T20:41:55.000+02:00
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testFileExists.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testFileExists.st
@@ -0,0 +1,9 @@
+tests-filestreams
+testFileExists
+	| theFileName |
+	self 
+		writeToFile: 'test' 
+		withFileNameDo:[ :fileName |
+			self assert: (GRPlatform current fileExists: fileName).
+			theFileName := fileName ].
+	self deny: (GRPlatform current fileExists: theFileName)
