--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/+blockmatrix/zeroTest.m	Fri Sep 07 14:40:58 2018 +0200
@@ -0,0 +1,68 @@
+function tests = zeroTest()
+    tests = functiontests(localfunctions);
+end
+
+function testZero(testCase)
+    cases = {
+        {
+            {[],[]},
+            {},
+        },
+        {
+            {0,0},
+            {[]};
+        },
+        {
+            {1,1},
+            {0};
+        },
+        {
+            {2,1},
+            {[0; 0]};
+        },
+        {
+            {1,2},
+            {[0 0]};
+        },
+        {
+            {[1 2],2},
+            {[0 0];[0 0; 0 0]};
+        },
+        {
+            {[1 2],[2 1]},
+            {[0 0],[0];[0 0; 0 0],[0; 0]};
+        },
+        {
+            {[3],[0]},
+            {zeros(3,0)},
+        },
+
+        {
+            {[0],[3]},
+            {zeros(0,3)},
+        },
+        {
+            {[0 2],[0 3]},
+            {
+                zeros(0,0), zeros(0,3);
+                zeros(2,0), zeros(2,3);
+            },
+        },
+    };
+
+    for i = 1:length(cases)
+        out = convertToFull(blockmatrix.zero(cases{i}{1}));
+        expected = cases{i}{2};
+        testCase.verifyEqual(out,expected);
+    end
+end
+
+
+function C = convertToFull(C)
+    [N,M] = size(C);
+    for i = 1:N
+        for j = 1:M
+            C{i,j} = full(C{i,j});
+        end
+    end
+end
\ No newline at end of file