Bug 164247 [DataBinding] NPE from ObservableMapLabelProvider when value is null
When a null value is to be returned from getColumnText(...) a NPE is thrown. It's trying to do a toString() on the null value.
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/jface/tests/databinding/BindingTestSuite.java
public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    public static Test suite() {
        return new BindingTestSuite();
    }
    public BindingTestSuite() {
        
        addTestSuite(IdentityConverterTest.class);
        
        addTestSuite(DefaultBindSupportFactoryBooleanPrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryBytePrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryDoublePrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryFloatPrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryIntTest.class);
        addTestSuite(DefaultBindSupportFactoryLongPrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryShortPrimitiveTest.class);
        addTestSuite(DefaultBindSupportFactoryTest.class);
        
        addTestSuite(ObjectToPrimitiveValidatorTest.class);
        
        addTestSuite(BindSpecTests.class);
        addTestSuite(ComputedValueTest.class);
        addTestSuite(DatabindingContextTest.class);