[ 
https://issues.apache.org/jira/browse/CURATOR-616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Xiao Wang updated CURATOR-616:
------------------------------
    Description: 
h3. Description

I noticed that there is a test class 
[DummyLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/test/java/org/apache/commons/configuration2/TestPropertiesConfiguration.java#L91]
 implements production class 
[PropertiesConfigurationLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfigurationLayout.java#L102]
 to assist testing method [PropertiesConfiguration.propertyLoaded(String, 
String, 
Deque<URL>)|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfiguration.java#L1467].
 This might not be the best priactice in unit testing and can be improved by 
leveraging mocking frameworks.
h3. Current Implementation
* {{DummyLayout}} extends {{PropertiesConfigurationLayout}} and creates a new 
variable to keep tracking of the method invocation status for 
{{load(PropertiesConfiguration, Reader)}}.
* In test cases, after executing 
{{PropertiesConfiguration.propertyLoaded(String, String, Deque<URL>)}}, the new 
variable will be used in assertion statement to check the execution status of 
{{load(PropertiesConfiguration, Reader)}}.

h3. Proposed Implementation
 * Replace {{DummyLayout}} with a mocking object created by Mockito.
 * Remove the {{int}} variable that used to keep tracking the invocation times 
of {{load(PropertiesConfiguration, Reader)}}.
 * Use {{Mockito.verify()}} to check execution status of 
{{load(PropertiesConfiguration, Reader)}}.

h3. Motivation
 * Decouple test class `DummyLayout` from production class 
`PropertiesConfigurationLayout`.
 * Make test logic more clear by removing the overridden method in 
{{DummyLayout}}.
 * Make test condition more explict by directly using {{Mockito.verify()}} to 
verify method execution status.

  was:
h3. Description

I noticed that there is a test class 
[DummyLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/test/java/org/apache/commons/configuration2/TestPropertiesConfiguration.java#L91]
 implements production class 
[PropertiesConfigurationLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfigurationLayout.java#L102]
 to assist testing method [PropertiesConfiguration.propertyLoaded(String, 
String, 
Deque<URL>)|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfiguration.java#L1467].
 This might not be the best priactice in unit testing and can be improved by 
leveraging mocking frameworks.
h3. Current Implementation
*  {{DummyLayout}} extends {{PropertiesConfigurationLayout}} and creates a new 
variable to keep tracking of the method invocation status for 
{{load(PropertiesConfiguration, Reader)}}.
* In test cases, after executing 
{{PropertiesConfiguration.propertyLoaded(String, String, Deque<URL>)}}, the new 
variable will be used in assertion statement to check the execution status of 
{{load(PropertiesConfiguration, Reader)}}.

h3. Proposed Implementation
 * Replace {{DummyLayout}} with a mocking object created by Mockito.
 * Remove the {{int}} variable that used to keep tracking the invocation times 
of {{load(PropertiesConfiguration, Reader)}}.
 * Use {{Mockito.verify()}} to check execution status of 
{{load(PropertiesConfiguration, Reader)}}.

h3. Motivation
 * Decouple test class `DummyLayout` from production class 
`PropertiesConfigurationLayout`.
 * Make test logic more clear by removing the overridden method in 
{{DummyLayout}}.
 * Make test condition more explict by directly using {{Mockito.verify()}} to 
verify method execution status.


> Refactor DummyLayout in TestPropertiesConfiguration to improve test design
> --------------------------------------------------------------------------
>
>                 Key: CURATOR-616
>                 URL: https://issues.apache.org/jira/browse/CURATOR-616
>             Project: Apache Curator
>          Issue Type: Improvement
>          Components: Tests
>            Reporter: Xiao Wang
>            Priority: Minor
>
> h3. Description
> I noticed that there is a test class 
> [DummyLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/test/java/org/apache/commons/configuration2/TestPropertiesConfiguration.java#L91]
>  implements production class 
> [PropertiesConfigurationLayout|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfigurationLayout.java#L102]
>  to assist testing method [PropertiesConfiguration.propertyLoaded(String, 
> String, 
> Deque<URL>)|https://github.com/apache/commons-configuration/blob/66b4f4eb73b276d041debaad80af3074ccb359bd/src/main/java/org/apache/commons/configuration2/PropertiesConfiguration.java#L1467].
>  This might not be the best priactice in unit testing and can be improved by 
> leveraging mocking frameworks.
> h3. Current Implementation
> * {{DummyLayout}} extends {{PropertiesConfigurationLayout}} and creates a new 
> variable to keep tracking of the method invocation status for 
> {{load(PropertiesConfiguration, Reader)}}.
> * In test cases, after executing 
> {{PropertiesConfiguration.propertyLoaded(String, String, Deque<URL>)}}, the 
> new variable will be used in assertion statement to check the execution 
> status of {{load(PropertiesConfiguration, Reader)}}.
> h3. Proposed Implementation
>  * Replace {{DummyLayout}} with a mocking object created by Mockito.
>  * Remove the {{int}} variable that used to keep tracking the invocation 
> times of {{load(PropertiesConfiguration, Reader)}}.
>  * Use {{Mockito.verify()}} to check execution status of 
> {{load(PropertiesConfiguration, Reader)}}.
> h3. Motivation
>  * Decouple test class `DummyLayout` from production class 
> `PropertiesConfigurationLayout`.
>  * Make test logic more clear by removing the overridden method in 
> {{DummyLayout}}.
>  * Make test condition more explict by directly using {{Mockito.verify()}} to 
> verify method execution status.



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