### Question:
VariableRow { public String getDataTypeDisplayName() { return dataTypeDisplayName; } VariableRow();  VariableRow(final Variable.VariableType variableType,
                       final String name,
                       final String dataTypeDisplayName,
                       final String customDataType);  VariableRow(final Variable variable,
                       final Map<String, String> mapDataTypeNamesToDisplayNames);  VariableRow(final Variable.VariableType variableType,
                       final String name,
                       final String dataTypeDisplayName,
                       final String customDataType,
                       final List<String> tags); List<String> getTags(); void setTags(List<String> tags); long getId(); void setId(final long id); Variable.VariableType getVariableType(); void setVariableType(final Variable.VariableType variableType); String getName(); void setName(final String name); String getDataTypeDisplayName(); void setDataTypeDisplayName(final String dataTypeDisplayName); String getCustomDataType(); void setCustomDataType(final String customDataType); @Override boolean equals(final Object obj); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void getDataTypeDisplayName() { VariableRow tested1 = new VariableRow(); tested1.dataTypeDisplayName = DATA_TYPE_DISPLAY_NAME; assertEquals(DATA_TYPE_DISPLAY_NAME, tested1.getDataTypeDisplayName()); Variable variable2 = new Variable(NAME, VARIABLE_TYPE, DATA_TYPE, null, null); VariableRow tested2 = new VariableRow(variable2, MAP_DATA_TYPE_NAMES_TO_DISPLAY_NAMES); assertEquals(DATA_TYPE_DISPLAY_NAME, tested2.getDataTypeDisplayName()); String dataType = "Object"; Variable variable3 = new Variable(NAME, VARIABLE_TYPE, dataType, null, null); VariableRow tested3 = new VariableRow(variable3, MAP_DATA_TYPE_NAMES_TO_DISPLAY_NAMES); assertEquals(dataType, tested3.getDataTypeDisplayName()); }