Explain mergeProps in HOCs

Author: Ray Schamp

src/lib/hash-parser-hoc.jsx

@@ -79,6 +79,7 @@ const HashParserHOC = function (WrappedComponent) {
     const mapDispatchToProps = dispatch => ({
         setProjectId: projectId => dispatch(setProjectId(projectId))
     });
+    // Allow incoming props to override redux-provided props. Used to mock in tests.
     const mergeProps = (stateProps, dispatchProps, ownProps) => Object.assign(
         {}, stateProps, dispatchProps, ownProps
     );

src/lib/project-fetcher-hoc.jsx

@@ -126,6 +126,7 @@ const ProjectFetcherHOC = function (WrappedComponent) {
             dispatch(onFetchedProjectData(projectData, loadingState)),
         setProjectId: projectId => dispatch(setProjectId(projectId))
     });
+    // Allow incoming props to override redux-provided props. Used to mock in tests.
     const mergeProps = (stateProps, dispatchProps, ownProps) => Object.assign(
         {}, stateProps, dispatchProps, ownProps
     );

src/lib/vm-manager-hoc.jsx

@@ -104,6 +104,7 @@ const vmManagerHOC = function (WrappedComponent) {
         onLoadedProject: loadingState => dispatch(onLoadedProject(loadingState))
     });
 
+    // Allow incoming props to override redux-provided props. Used to mock in tests.
     const mergeProps = (stateProps, dispatchProps, ownProps) => Object.assign(
         {}, stateProps, dispatchProps, ownProps
     );