Update.

test/argparse/append.wren

@@ -0,0 +1,12 @@
+// retoor <retoor@molodetz.nl>
+
+import "argparse" for ArgumentParser
+
+var parser = ArgumentParser.new()
+parser.addArgument("-i", {"long": "--include", "action": "append"})
+
+var args = parser.parseArgs(["-i", "foo", "-i", "bar", "--include", "baz"])
+System.print(args["include"].count) // expect: 3
+System.print(args["include"][0]) // expect: foo
+System.print(args["include"][1]) // expect: bar
+System.print(args["include"][2]) // expect: baz

test/argparse/count.wren

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+// retoor <retoor@molodetz.nl>
+
+import "argparse" for ArgumentParser
+
+var parser = ArgumentParser.new()
+parser.addArgument("-v", {"action": "count"})
+
+var args = parser.parseArgs([])
+System.print(args["v"]) // expect: 0
+
+var args2 = parser.parseArgs(["-v"])
+System.print(args2["v"]) // expect: 1
+
+var args3 = parser.parseArgs(["-v", "-v", "-v"])
+System.print(args3["v"]) // expect: 3

test/argparse/flags.wren

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+// retoor <retoor@molodetz.nl>
+
+import "argparse" for ArgumentParser
+
+var parser = ArgumentParser.new()
+parser.addArgument("-v", {"long": "--verbose", "action": "storeTrue"})
+parser.addArgument("-q", {"action": "storeFalse", "dest": "verbose_output"})
+
+var args = parser.parseArgs([])
+System.print(args["verbose"]) // expect: false
+System.print(args["verbose_output"]) // expect: true
+
+var args2 = parser.parseArgs(["-v"])
+System.print(args2["verbose"]) // expect: true
+
+var args3 = parser.parseArgs(["-q"])
+System.print(args3["verbose_output"]) // expect: false

test/argparse/optional.wren

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+// retoor <retoor@molodetz.nl>
+
+import "argparse" for ArgumentParser
+
+var parser = ArgumentParser.new()
+parser.addArgument("-o", {"long": "--output", "default": "out.txt"})
+parser.addArgument("-n", {"type": "int", "default": 1})
+
+var args = parser.parseArgs([])
+System.print(args["output"]) // expect: out.txt
+System.print(args["n"]) // expect: 1
+
+var args2 = parser.parseArgs(["-o", "result.txt", "-n", "5"])
+System.print(args2["output"]) // expect: result.txt
+System.print(args2["n"]) // expect: 5
+
+var args3 = parser.parseArgs(["--output", "final.txt"])
+System.print(args3["output"]) // expect: final.txt

test/argparse/positional.wren

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+// retoor <retoor@molodetz.nl>
+
+import "argparse" for ArgumentParser
+
+var parser = ArgumentParser.new()
+parser.addArgument("filename")
+parser.addArgument("output", {"required": false, "default": "out.txt"})
+
+var args = parser.parseArgs(["input.txt"])
+System.print(args["filename"]) // expect: input.txt
+System.print(args["output"]) // expect: out.txt
+
+var args2 = parser.parseArgs(["input.txt", "result.txt"])
+System.print(args2["filename"]) // expect: input.txt
+System.print(args2["output"]) // expect: result.txt