add a test for the recent glew accessor functionality

t/02_glew_version_accessors.t

@@ -0,0 +1,42 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+use Test::More;
+use OpenGL::Modern ':all';
+use OpenGL::Modern::Helpers 'glGetVersion_p';
+
+SKIP: {
+    skip "glewContext did not succeed, skipping live tests", 1
+      unless glewCreateContext() == GLEW_OK;    # returns GL_TRUE or GL_FALSE
+
+    my $gI_status = ( done_glewInit() ) ? GLEW_OK() : glewInit();    # returns GLEW_OK or ???
+    skip "glewInit did not succeed, skipping live tests", 1 unless $gI_status == GLEW_OK;
+
+    my @version_pairs = (
+        [ GLEW_VERSION_1_1, 1.1 ],
+        [ GLEW_VERSION_1_2, 1.2 ],
+        [ GLEW_VERSION_1_3, 1.3 ],
+        [ GLEW_VERSION_1_4, 1.4 ],
+        [ GLEW_VERSION_1_5, 1.5 ],
+        [ GLEW_VERSION_2_0, 2.0 ],
+        [ GLEW_VERSION_2_1, 2.1 ],
+        [ GLEW_VERSION_3_0, 3.0 ],
+        [ GLEW_VERSION_3_1, 3.1 ],
+        [ GLEW_VERSION_3_2, 3.2 ],
+        [ GLEW_VERSION_3_3, 3.3 ],
+        [ GLEW_VERSION_4_0, 4.0 ],
+        [ GLEW_VERSION_4_1, 4.1 ],
+        [ GLEW_VERSION_4_2, 4.2 ],
+        [ GLEW_VERSION_4_3, 4.3 ],
+        [ GLEW_VERSION_4_4, 4.4 ],
+        [ GLEW_VERSION_4_5, 4.5 ],
+    );
+    my $version = glGetVersion_p;
+    $_->[2] = $version >= $_->[1] ? 1 : 0 for @version_pairs;
+
+    is $_->[0], $_->[2], sprintf "glew version %.1f reported correctly as $_->[2] for $version", $_->[1]    #
+      for @version_pairs;
+
+    done_testing;
+}