Added unitary test.

matlab/@dynDates/append.m

@@ -96,4 +96,28 @@ end
 %$ t(2) = dyn_assert(d.freq,e.freq);
 %$ t(3) = dyn_assert(d.ndat,e.ndat);
 %$ T = all(t);
-%@eof:1
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+%@eof:1
+
+%@test:2
+%$ % Define some dates
+%$ B1 = '1953Q4';
+%$ B2 = '1950Q2';
+%$ B3 = '1950Q1';
+%$ B4 = '1945Q3';
+%$ B5 = '2009q2';
+%$
+%$ % Define expected results.
+%$ e.time = [1945 3; 1950 1; 1950 2; 1953 4; 2009 2];
+%$ e.freq = 4;
+%$ e.ndat = 5;
+%$
+%$ % Call the tested routine.
+%$ d = dynDates(B4,B3,B2,B1);
+%$ d = d.append(B5);
+%$
+%$ % Check the results.
+%$ t(1) = dyn_assert(d.time,e.time);
+%$ t(2) = dyn_assert(d.freq,e.freq);
+%$ t(3) = dyn_assert(d.ndat,e.ndat);
+%$ T = all(t);
+%@eof:2
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