TST: replace "fprintf(0,...)" statements by "abs(...)" statements, be…

…cause Matlab raises an error when trying to write to fid=0

tests/test_MOcovMFile_recognizes_classdef_syntax.m

@@ -4,7 +4,8 @@
 
 function assertStringContains(text, subtext)
     assert(~isempty(strfind(text, subtext)), ...
-        'String ''%s'' should contain ''%s'', but it doesn''t.', text, subtext);
+        'String ''%s'' should contain ''%s'', but it doesn''t.', ...
+                        text, subtext);
 end
 
 function filepath = create_tempfile(filename, contents)
@@ -32,12 +33,12 @@ function assertStringContains(text, subtext)
         '  end\n', ...
         '  methods\n', ...
         '    function self =  ', classname, ' \n', ...
-        '      fprintf(0, ''hello world!'');\n', ...
+        '      abs(1);\n', ...
         '    end\n', ...
         '  end\n', ...
         '  methods (Access = public)\n', ...
         '    function x = aMethod(self)\n', ...
-        '      fprintf(0, ''hello world!'');\n', ...
+        '      abs(2);\n', ...
         '    end\n', ...
         '  end\n', ...
         'end\n' ...
@@ -89,7 +90,7 @@ function assertStringContains(text, subtext)
     method_lines = [10, 15];
 
     for n = method_lines
-        assertStringContains(lines{n}, 'fprintf');
+        assertStringContains(lines{n}, 'abs(');
         assert(executable_lines(n), ...
             '`%s` line is wrongly classified as non-executable', lines{n});
     end
@@ -132,9 +133,9 @@ function assertStringContains(text, subtext)
     classname = ['AClass', char(64 + ceil(26*rand(1, 20)))];
     tempfile = create_classdef(classname);
     teardown = onCleanup(@() delete(tempfile));
-    % a valid decorator
+    % a valid decorator (which does nothing)
     decorator = @(line_number) ...
-        sprintf('fprintf(0, ''%s:%d'');', tempfile, line_number);
+        sprintf('abs(3);');
 
     % When: the decorated file is generated
     mfile = MOcovMFile(tempfile);
@@ -151,7 +152,8 @@ function assertStringContains(text, subtext)
         aObject = constructor();
         aObject.aMethod();
     catch
-        assert(false, ['Problems when running the decorated file: `%s` ', ...
-                       'please check for syntax errors.'], decorated);
+        assert(false, ['Problems when running the decoated file: ', ...
+                       '%s - please check for syntax errors.'], tempfile);
     end
 end
+