+
+# Arc
+
+$tikz = Tikz->formatter(
+ format => "%.03f"
+);
+
+my $arc = eval {
+ Tikz->arc(1, i, $o);
+};
+is $@, '', 'creating a simple arc doesn\'t croak';
+
+check $arc, 'simple arc', <<'RES';
+\begin{scope}
+\clip (0.969cm,0.000cm) -- (1.085cm,0.000cm) -- (1.032cm,0.335cm) -- (0.878cm,0.638cm) -- (0.638cm,0.878cm) -- (0.335cm,1.032cm) -- (0.000cm,1.085cm) -- (0.000cm,0.969cm) -- cycle ;
+\draw (0.000cm,0.000cm) circle (1.000cm) ;
+\end{scope}
+RES
+
+eval {
+ Tikz->arc(0, 1);
+};
+my $err = quotemeta 'Tikz->arc($first_point, $second_point, $center)';
+like $@, qr/^$err/, 'creating an arc from only two points croaks';
+
+eval {
+ Tikz->arc(0, 1, i);
+};
+like $@, qr/The two first points aren't on a circle of center the last/,
+ 'creating an arc with two points not on a circle of center c croaks';