Update.

test/io/file/copy.wren

@@ -0,0 +1,17 @@
+// retoor <retoor@molodetz.nl>
+
+import "io" for File
+
+var srcFile = "/tmp/test_copy_src.txt"
+var dstFile = "/tmp/test_copy_dst.txt"
+var content = "Copy me!"
+
+File.write(srcFile, content)
+
+File.copy(srcFile, dstFile)
+
+System.print(File.exists(dstFile)) // expect: true
+System.print(File.read(dstFile) == content) // expect: true
+
+File.delete(srcFile)
+File.delete(dstFile)

test/io/file/move.wren

@@ -0,0 +1,17 @@
+// retoor <retoor@molodetz.nl>
+
+import "io" for File
+
+var srcFile = "/tmp/test_move_src.txt"
+var dstFile = "/tmp/test_move_dst.txt"
+var content = "Move me!"
+
+File.write(srcFile, content)
+
+File.move(srcFile, dstFile)
+
+System.print(File.exists(srcFile)) // expect: false
+System.print(File.exists(dstFile)) // expect: true
+System.print(File.read(dstFile) == content) // expect: true
+
+File.delete(dstFile)

test/io/file/write_static.wren

@@ -0,0 +1,13 @@
+// retoor <retoor@molodetz.nl>
+
+import "io" for File
+
+var testFile = "/tmp/test_write_static.txt"
+var content = "Hello, World!"
+
+File.write(testFile, content)
+
+var read = File.read(testFile)
+System.print(read == content) // expect: true
+
+File.delete(testFile)

test/io/window_size.wren

@@ -0,0 +1,13 @@
+// retoor <retoor@molodetz.nl>
+
+import "io" for Stdin
+
+var size = Stdin.windowSize
+
+System.print(size == null || size is List) // expect: true
+
+if (size != null) {
+    System.print(size.count == 2)
+    System.print(size[0] > 0)
+    System.print(size[1] > 0)
+}