cache state, only recreate when new resource is set (#613)

Signed-off-by: Andre Dietisheim <[email protected]>

Author: adietish

src/main/kotlin/com/redhat/devtools/intellij/kubernetes/editor/EditorResource.kt

@@ -62,6 +62,7 @@ open class EditorResource(
                 && !areEqual(new, existing)) {
                 this.resource = new
             }
+            setState(null) // reset state
         }
     }
 
@@ -94,13 +95,18 @@ open class EditorResource(
      */
     fun getState(): EditorResourceState {
         return resourceChangeMutex.withLock {
-            val state = getState(resource, state)
-            this.state = state
-            state
+            val existingState = this.state
+            if (existingState == null) {
+                val newState = createState(resource, null)
+                setState(newState)
+                newState
+            } else {
+                existingState
+            }
         }
     }
 
-    private fun getState(resource: HasMetadata, existingState: EditorResourceState?): EditorResourceState {
+    private fun createState(resource: HasMetadata, existingState: EditorResourceState?): EditorResourceState {
         val isModified = isModified(resource)
         return when {
             !isConnected() ->
@@ -122,12 +128,14 @@ open class EditorResource(
                     isOutdatedVersion()
                 )
 
+            existingState is Error ->
+                existingState
+
             isOutdatedVersion() ->
                 Outdated()
 
             existingState is Pulled
-                    || existingState is Pushed
-                    || existingState is Error ->
+                    || existingState is Pushed ->
                         existingState
 
             !existsOnCluster() ->
@@ -149,7 +157,7 @@ open class EditorResource(
              * Store resource that we tried to push but failed.
              * In this way this resource is not in modified state anymore
              * @see isModified
-             * @see getState(resource: HasMetadata, existingState: EditorResourceState?)
+             * @see createState(resource: HasMetadata, existingState: EditorResourceState?)
              */
             setLastPushedPulled(resource)
             when {

src/test/kotlin/com/redhat/devtools/intellij/kubernetes/editor/EditorResourceTest.kt

@@ -302,6 +302,7 @@ class EditorResourceTest {
         val error = Error("oh my!")
         editorResource.setState(error)
         editorResource.setLastPushedPulled(POD3) // modified = (current resource != lastPushedPulled)
+        editorResource.setResource(POD2) // cause state to be recreated
         // when
         val state = editorResource.getState()
         // then
@@ -403,6 +404,10 @@ class EditorResourceTest {
     @Test
     fun `#getState should return Modified if resource is modified when compared to last pulled pushed resource`() {
         // given
+        doReturn(true)
+            .whenever(clusterResource).isSupported()
+        doReturn(true) // don't create modified state because it doesnt exist on cluster
+            .whenever(clusterResource).exists()
         val editorResource = createEditorResource(POD2)
         val modified = PodBuilder(POD2)
             .editMetadata()
@@ -411,10 +416,6 @@ class EditorResourceTest {
             .build()
         editorResource.setResource(modified)
         editorResource.setLastPushedPulled(POD2)
-        doReturn(true)
-            .whenever(clusterResource).isSupported()
-        doReturn(true) // don't create modified state because it doesnt exist on cluster
-            .whenever(clusterResource).exists()
         // when
         val state = editorResource.getState()
         // then
@@ -438,6 +439,24 @@ class EditorResourceTest {
         assertThat(state).isInstanceOf(Outdated::class.java)
     }
 
+    @Test
+    fun `#getState should return Error if resource is outdated but in error`() {
+        // given
+        val editorResource = createEditorResource(POD2)
+        doReturn(true)
+            .whenever(clusterResource).isSupported()
+        doReturn(true)
+            .whenever(clusterResource).isOutdatedVersion(any())
+        doReturn(true) // don't return modified state because it doesnt exist
+            .whenever(clusterResource).exists()
+        editorResource.setLastPushedPulled(POD2) // don't return modified because last pulled pushed is different
+        editorResource.setState(mock<Error>())
+        // when
+        val state = editorResource.getState()
+        // then
+        assertThat(state).isInstanceOf(Error::class.java)
+    }
+
     @Test
     fun `#dispose should close clusterResource that was created`() {
         // given