IG: fix static import checking in "Unused import" inspection

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/imports/ImportsAreUsedVisitor.java

@@ -103,8 +103,15 @@ class ImportsAreUsedVisitor extends JavaRecursiveElementVisitor {
     final boolean hasOnDemandImportConflict = ImportUtils.hasOnDemandImportConflict(qualifiedName, myFile);
     for (PsiImportStatementBase importStatement : importStatements) {
       if (!importStatement.isOnDemand()) {
-        if (member.equals(importStatement.resolve())) {
-          return importStatement;
+        final PsiJavaCodeReferenceElement reference = importStatement.getImportReference();
+        if (reference == null) {
+          continue;
+        }
+        final JavaResolveResult[] targets = reference.multiResolve(false);
+        for (JavaResolveResult target : targets) {
+          if (member.equals(target.getElement())) {
+            return importStatement;
+          }
         }
       }
       else {

plugins/InspectionGadgets/testsrc/com/siyeh/ig/imports/UnusedImportInspectionTest.java

@@ -54,6 +54,15 @@ public class UnusedImportInspectionTest extends LightInspectionTestCase {
            "}");
   }
 
+  public void testExactStaticImport() {
+    doTest("package a;\n" +
+           "import static java.lang.Math.abs;\n" +
+           "/*Unused import 'import static java.lang.Math.max;'*/import static java.lang.Math.max;/**/\n" +
+           "class Main {{\n" +
+           "  abs(1);\n" +
+           "}}");
+  }
+
   public void testStaticImportOnDemandConflict1() {
     addEnvironmentClass("package a;" +
                         "public class Parent {" +
@@ -183,6 +192,15 @@ public class UnusedImportInspectionTest extends LightInspectionTestCase {
            "}}");
   }
 
+  public void testNoConflictInSamePackage() {
+    doTest("package a;" +
+           "/*Unused import 'import java.util.List;'*/import java.util.List;/**/" +
+           "import java.util.*;" +
+           "class X {{" +
+           "  List list = new ArrayList();" +
+           "}}");
+  }
+
   @Override
   protected LocalInspectionTool getInspection() {
     return new UnusedImportInspection();