add tests for MID/MIDB

cell/.unit-tests/FormulaTests.js

@@ -9346,5 +9346,37 @@ $( function () {
 		strictEqual( oParser.calculate().getValue(), 303, "SUBTOTAL(9,A102:A105)");
 	} );
 
+	test( "Test: \"MID\"", function () {
+		ws.getRange2( "A101" ).setValue( "Fluid Flow" );
+
+		oParser = new parserFormula( "MID(A101,1,5)", "A2", ws );
+		ok( oParser.parse(), "MID(A101,1,5)" );
+		strictEqual( oParser.calculate().getValue(), "Fluid", "MID(A101,1,5)");
+
+		oParser = new parserFormula( "MID(A101,7,20)", "A2", ws );
+		ok( oParser.parse(), "MID(A101,7,20)" );
+		strictEqual( oParser.calculate().getValue(), "Flow", "MID(A101,7,20)");
+
+		oParser = new parserFormula( "MID(A101,20,5)", "A2", ws );
+		ok( oParser.parse(), "MID(A101,20,5)" );
+		strictEqual( oParser.calculate().getValue(), "", "MID(A101,20,5))");
+	} );
+
+	test( "Test: \"MIDB\"", function () {
+		ws.getRange2( "A101" ).setValue( "Fluid Flow" );
+
+		oParser = new parserFormula( "MIDB(A101,1,5)", "A2", ws );
+		ok( oParser.parse(), "MIDB(A101,1,5)" );
+		strictEqual( oParser.calculate().getValue(), "Fluid", "MIDB(A101,1,5)");
+
+		oParser = new parserFormula( "MIDB(A101,7,20)", "A2", ws );
+		ok( oParser.parse(), "MIDB(A101,7,20)" );
+		strictEqual( oParser.calculate().getValue(), "Flow", "MIDB(A101,7,20)");
+
+		oParser = new parserFormula( "MIDB(A101,20,5)", "A2", ws );
+		ok( oParser.parse(), "MIDB(A101,20,5)" );
+		strictEqual( oParser.calculate().getValue(), "", "MIDB(A101,20,5))");
+	} );
+
 	wb.dependencyFormulas.unlockRecal();
 } );