单元测试、调试和运行模式下的模拟对象

Question

I'm developing unit test. If I start test in Run mode, the run is failed with message:

This exception may occur if matchers are combined with raw values: 
   //incorrect:
   someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
   //correct:
   someMethod(anyObject(), eq("String by matcher"));
For more info see javadoc for Matchers class.

If I run the test in Debug mode with the breakpoint on String tableName = table.getTableName() the test is passing well. The stop occurs on the breakpoint.

@Test
void myTest() {
    Table table = mock(Table.class);
    when(table.getTableName()).thenReturn("mytableName")
    SQLService service = new SQLService(table);
    service.select();
}

class SQLService {
    private final Table table;
    SQLService(Table table) {
         this.table = table;
    }

    void select() {
        String tableName = table.getTableName(); // <---- issue here, breakpoint is set on this line
        ........    
    }
}

Answer 1

This issue is caused by mixing matchers with raw values. If you use matchers then you need to use matchers for all arguments.

Try and use the .eq() matcher, with your code it is something like this:

when(Mockito.eq(table.getTableName())).thenReturn("mytableName");