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							- guard rail tests for nonexistent lookups in manager classes
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							 | 
							
							- custom exception for nonexistent Entity ID
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							 | 
							
							- custom exception for nonexistent Component ID
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							 | 
							
							- test component activation
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							 | 
							
							- test component deactivation
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							 | 
							
							- test component removal
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							 | 
							
							- test entity destroy
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