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diff --git a/tcllib/modules/struct/graph/tests/attr/keys.test b/tcllib/modules/struct/graph/tests/attr/keys.test
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+++ b/tcllib/modules/struct/graph/tests/attr/keys.test
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+# -*- tcl -*-
+# Graph tests - graph/arc/node keys (attribute keys)
+# Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
+# All rights reserved.
+# RCS: @(#) $Id: keys.test,v 1.3 2008/03/07 06:51:39 andreas_kupries Exp $
+
+# Syntax: graph      keys      ?PATTERN?
+# Syntax: graph arc  keys ARC  ?PATTERN?
+# Syntax: graph node keys NODE ?PATTERN?
+
+# -------------------------------------------------------------------------
+
+foreach {e ex stem mp mk} {
+    arc   Arc   {mygraph arc}  {arc }  x
+    node  Node  {mygraph node} {node } x
+    graph Graph {mygraph}      {}      {}
+} {
+    AttrSetup
+
+    # -------------------------------------------------------------------------
+    # Wrong # args: Missing, Too many
+
+    test graph-${impl}-${setimpl}-${e}-keys-1.0 "$e keys, wrong # args, missing" !graph {
+	SETUP
+	catch {CMD keys} msg
+	mygraph destroy
+	set msg
+    } [tmWrongA "${mp}keys" "${mp}?pattern?" 0] ; # {}
+
+    test graph-${impl}-${setimpl}-${e}-keys-1.1 "$e keys, wrong # args, too many" {
+	SETUP
+	catch {CMD keys a b c} msg
+	mygraph destroy
+	set msg
+    } [tmTooManyA "${mp}keys" "${mp}?pattern?"] ; # {}
+
+    # -------------------------------------------------------------------------
+    # Logical arguments checks and failures
+
+    test graph-${impl}-${setimpl}-${e}-keys-2.0 "$e keys, missing $e" !graph {
+	SETUP
+	catch {Keys$ex} msg
+	mygraph destroy
+	set msg
+    } [Missing$ex $MY x] ; # {}
+
+    # -------------------------------------------------------------------------
+    # Ok arguments.
+
+    test graph-${impl}-${setimpl}-${e}-keys-3.0 "$e keys, no attributes, empty list result" {
+	SETUP
+	$ex
+	set results [Keys$ex]
+	mygraph destroy
+	set results
+    } {}
+
+    test graph-${impl}-${setimpl}-${e}-keys-3.1 "$e keys, list result" {
+	SETUP
+	$ex
+	SetW$ex data  foobar
+	SetW$ex other thing
+	set results [Keys$ex]
+	mygraph destroy
+	lsort $results
+    } {data other}
+
+    test graph-${impl}-${setimpl}-${e}-keys-3.2 "$e keys, pattern match" {
+	SETUP
+	$ex
+	SetW$ex data  foobar
+	SetW$ex other thing
+	set results [KeysP$ex d*]
+	mygraph destroy
+	set results
+    } data
+}
+
+# -------------------------------------------------------------------------