fix unused imports

Author: patricklx

src/main/kotlin/com/emberjs/hbs/TagReferencesProvider.kt

@@ -23,6 +23,7 @@ import com.emberjs.utils.originalVirtualFile
 import com.intellij.injected.editor.VirtualFileWindow
 import com.intellij.lang.Language
 import com.intellij.lang.ecmascript6.psi.ES6ImportDeclaration
+import com.intellij.lang.ecmascript6.psi.ES6ImportSpecifier
 import com.intellij.lang.injection.InjectedLanguageManager
 import com.intellij.lang.javascript.JavaScriptSupportLoader
 import com.intellij.lang.javascript.psi.JSObjectLiteralExpression
@@ -226,6 +227,26 @@ class TagReference(val element: XmlTag, val fullName: String, val rangeInElem: T
         var res = resolve()
         if (res is EmberNamedElement) {
             res = res.target
+            if (element.manager.areElementsEquivalent(res, other) || super.isReferenceTo(other)) {
+                return true
+            }
+        }
+        if (res is ES6ImportSpecifier) {
+            if (element.manager.areElementsEquivalent(res.reference?.resolve(), other)) {
+                return true
+            }
+            if (res.references.any {
+                element.manager.areElementsEquivalent(it.element, other) || super.isReferenceTo(other)
+            }) {
+                return true
+            }
+            val results = res.multiResolve(false)
+            val r = results.any {
+                element.manager.areElementsEquivalent(it.element, other) || super.isReferenceTo(other)
+            }
+            if (r) {
+                return true
+            }
         }
         return element.manager.areElementsEquivalent(res, other) || super.isReferenceTo(other)
     }

src/test/kotlin/com/emberjs/gts/GtsFileTest.kt

@@ -71,7 +71,12 @@ class GtsFileTest : BasePlatformTestCase() {
 
     @Test
     fun testGtsImportUsed() {
+        val otherGts = """
+            export const OtherComponent = 2;
+            export const other = 2;
+        """.trimIndent()
         val gts = """
+            import { OtherComponent, other } from './other-component';
             import x from "a";
             import { y, quux } from "a";
             import qux from "a";
@@ -85,24 +90,28 @@ class GtsFileTest : BasePlatformTestCase() {
             export const Grault = {}; 
             
             export default <template>
+                <OtherComponent />
                 <Foo />
                 <Baz />
                 <Grault />
                 {{x}}
                 {{y}}
                 {{bar}}
                 {{grault}}
+                {{other}}
             </template>
         """.trimIndent()
-        myFixture.configureByText(GtsFileType.INSTANCE, gts)
+        myFixture.addFileToProject("other-component.ts", otherGts)
+        myFixture.addFileToProject("main.gts", gts)
+        myFixture.configureByFile("main.gts")
         myFixture.enableInspections(ES6UnusedImportsInspection(), JSUnusedLocalSymbolsInspection(), JSUnusedGlobalSymbolsInspection())
         CodeInsightTestFixtureImpl.ensureIndexesUpToDate(project)
         val highlighting = myFixture.doHighlighting()
         System.out.println(highlighting)
         val unusedConstants = highlighting.filter { it.description?.startsWith("Unused constant") == true }
         TestCase.assertEquals(unusedConstants.toString(), 0, unusedConstants.size)
         val highlightInfos: List<HighlightInfo> = highlighting.filter { it.inspectionToolId == "ES6UnusedImports" }
-        TestCase.assertEquals(highlightInfos.size, 2)
+        TestCase.assertEquals(2, highlightInfos.size)
         TestCase.assertTrue(highlightInfos.first().description.contains("quux"))
         TestCase.assertTrue(highlightInfos.last().description.contains("qux"))
     }