Issue 11892. It is compile-time error when unqualified invocation with unresolved identifier.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
index 5aca4965c41c0bd65b212cb317f950d591b96a27..90d9546ef77f32041b57643080706315b0c55618 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/CompileTimeErrorCodeTest.java
@@ -132,6 +132,23 @@ public class CompileTimeErrorCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_ambiguousImport_function() throws Exception {
+    Source source = addSource(createSource(//
+        "import 'lib1.dart';",
+        "import 'lib2.dart';",
+        "g() { return f(); }"));
+    addSource("/lib1.dart", createSource(//
+        "library lib1;",
+        "f() {}"));
+    addSource("/lib2.dart", createSource(//
+        "library lib2;",
+        "f() {}"));
+    resolve(source);
+    assertErrors(
+        StaticWarningCode.AMBIGUOUS_IMPORT,
+        StaticTypeWarningCode.INVOCATION_OF_NON_FUNCTION);
+  }
+
   public void test_argumentDefinitionTestNonParameter() throws Exception {
     Source source = addSource(createSource(//
         "f() {",
@@ -3168,6 +3185,24 @@ public class CompileTimeErrorCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_undefinedFunction() throws Exception {
+    Source source = addSource(createSource(//
+        "void f() {",
+        "  g();",
+        "}"));
+    resolve(source);
+    assertErrors(CompileTimeErrorCode.UNDEFINED_FUNCTION);
+  }
+
+  public void test_undefinedFunction_hasImportPrefix() throws Exception {
+    Source source = addSource(createSource(//
+        "import 'lib.dart' as f;",
+        "main() { return f(); }"));
+    addSource("/lib.dart", "library lib;");
+    resolve(source);
+    assertErrors(CompileTimeErrorCode.UNDEFINED_FUNCTION, HintCode.UNUSED_IMPORT);
+  }
+
   public void test_undefinedNamedParameter() throws Exception {
     Source source = addSource(createSource(//
         "class A {",