Mocking

TestSysNodesExpressions.java

OsService osService = mock(OsService.class);
OsStats osStats = mock(OsStats.class);
OsStats.Mem mem = mock(OsStats.Mem.class);
when(osStats.mem()).thenReturn(mem);
when(mem.actualFree()).thenReturn(byteSizeValue);
when(mem.actualUsed()).thenReturn(byteSizeValue);
when(mem.usedPercent()).thenReturn((short) 22);
when(mem.freePercent()).thenReturn((short) 78);
bind(OsService.class).toInstance(osService);