Beginning support for library prefixes in the dart API.

runtime/vm/dart_api_impl_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "platform/utils.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
@@ skipping 2591 matching lines @@
   Dart_Handle cls = Dart_GetClass(lib, Dart_NewString("Fields"));
   EXPECT_VALID(cls);
   Dart_Handle instance = Dart_Invoke(lib, Dart_NewString("test"), 0, NULL);
   EXPECT_VALID(instance);
   Dart_Handle name;
 
   // Load imported lib.
   Dart_Handle url = Dart_NewString("library_url");
   Dart_Handle source = Dart_NewString(kImportedScriptChars);
   Dart_Handle imported_lib = Dart_LoadLibrary(url, source);
+  Dart_Handle prefix = Dart_NewString("");
   EXPECT_VALID(imported_lib);
-  Dart_Handle result = Dart_LibraryImportLibrary(lib, imported_lib);
+  Dart_Handle result = Dart_LibraryImportLibrary(lib, imported_lib, prefix);
   EXPECT_VALID(result);
   result = Dart_Invoke(imported_lib, Dart_NewString("test2"), 0, NULL);
   EXPECT_VALID(result);
 
   // Instance field.
   name = Dart_NewString("instance_fld");
   TestFieldNotFound(lib, name);
   TestFieldNotFound(cls, name);
   TestFieldOk(instance, name, false, "instance");
 
@@ skipping 1069 matching lines @@
   Dart_Handle lib1 = Dart_LoadLibrary(url, source);
   EXPECT_VALID(lib1);
 
   // Load lib2
   url = Dart_NewString("library2_url");
   source = Dart_NewString(kLibrary2Chars);
   Dart_Handle lib2 = Dart_LoadLibrary(url, source);
   EXPECT_VALID(lib2);
 
   // Import lib2 from lib1
-  Dart_Handle result = Dart_LibraryImportLibrary(lib1, lib2);
+  Dart_Handle result = Dart_LibraryImportLibrary(lib1, lib2, Dart_Null());
   EXPECT_VALID(result);
 
   // We can invoke both private and non-private local functions.
   EXPECT_VALID(Dart_Invoke(lib1, Dart_NewString("local"), 0, NULL));
   EXPECT_VALID(Dart_Invoke(lib1, Dart_NewString("_local"), 0, NULL));
 
   // We can only invoke non-private imported functions.
   EXPECT_VALID(Dart_Invoke(lib1, Dart_NewString("imported"), 0, NULL));
   EXPECT_ERROR(Dart_Invoke(lib1, Dart_NewString("_imported"), 0, NULL),
                "did not find top-level function '_imported'");
@@ skipping 1525 matching lines @@
   Dart_Handle url = Dart_NewString("library1_url");
   Dart_Handle source = Dart_NewString(kLibrary1Chars);
   Dart_Handle lib1 = Dart_LoadLibrary(url, source);
   EXPECT_VALID(lib1);
 
   url = Dart_NewString("library2_url");
   source = Dart_NewString(kLibrary2Chars);
   Dart_Handle lib2 = Dart_LoadLibrary(url, source);
   EXPECT_VALID(lib2);
 
-  result = Dart_LibraryImportLibrary(Dart_Null(), lib2);
+  result = Dart_LibraryImportLibrary(Dart_Null(), lib2, Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ(
       "Dart_LibraryImportLibrary expects argument 'library' to be non-null.",
       Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(Dart_True(), lib2);
+  result = Dart_LibraryImportLibrary(Dart_True(), lib2, Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ("Dart_LibraryImportLibrary expects argument 'library' to be of "
                "type Library.",
                Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(error, lib2);
+  result = Dart_LibraryImportLibrary(error, lib2, Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ("incoming error", Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(lib1, Dart_Null());
+  result = Dart_LibraryImportLibrary(lib1, Dart_Null(), Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ(
       "Dart_LibraryImportLibrary expects argument 'import' to be non-null.",
       Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(lib1, Dart_True());
+  result = Dart_LibraryImportLibrary(lib1, Dart_True(), Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ("Dart_LibraryImportLibrary expects argument 'import' to be of "
                "type Library.",
                Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(lib1, error);
+  result = Dart_LibraryImportLibrary(lib1, error, Dart_Null());
   EXPECT(Dart_IsError(result));
   EXPECT_STREQ("incoming error", Dart_GetError(result));
 
-  result = Dart_LibraryImportLibrary(lib1, lib2);
+  result = Dart_LibraryImportLibrary(lib1, lib2, Dart_Null());
   EXPECT_VALID(result);
 }
 
 
+TEST_CASE(ImportLibraryWithPrefix) {
+  const char* kLibrary1Chars =
+      "#library('library1_name');"
+      "int bar() => 42;";
+  Dart_Handle url1 = Dart_NewString("library1_url");
+  Dart_Handle source1 = Dart_NewString(kLibrary1Chars);
+  Dart_Handle lib1 = Dart_LoadLibrary(url1, source1);
+  EXPECT_VALID(lib1);
+  EXPECT(Dart_IsLibrary(lib1));
+
+  const char* kLibrary2Chars =
+      "#library('library2_name');"
+      "int foobar() => foo.bar();";
+  Dart_Handle url2 = Dart_NewString("library2_url");
+  Dart_Handle source2 = Dart_NewString(kLibrary2Chars);
+  Dart_Handle lib2 = Dart_LoadLibrary(url2, source2);
+  EXPECT_VALID(lib2);
+  EXPECT(Dart_IsLibrary(lib2));
+
+  Dart_Handle prefix = Dart_NewString("foo");
+  Dart_Handle result = Dart_LibraryImportLibrary(lib2, lib1, prefix);
+  EXPECT_VALID(result);
+
+  // Lib1 is imported under a library prefix and therefore 'foo' should
+  // not be found directly in lib2.
+  Dart_Handle method_name = Dart_NewString("foo");
+  result = Dart_Invoke(lib2, method_name, 0, NULL);
+  EXPECT_ERROR(result, "Dart_Invoke: did not find top-level function 'foo'");
+
+  // Check that lib1 is available under the prefix in lib2.
+  method_name = Dart_NewString("foobar");
+  result = Dart_Invoke(lib2, method_name, 0, NULL);
+  EXPECT_VALID(result);
+  EXPECT(Dart_IsInteger(result));
+  int64_t value = 0;
+  EXPECT_VALID(Dart_IntegerToInt64(result, &value));
+  EXPECT_EQ(42, value);
+}
+
+
 
 TEST_CASE(LoadLibrary) {
   const char* kLibrary1Chars =
       "#library('library1_name');";
   Dart_Handle error = Dart_Error("incoming error");
   Dart_Handle result;
 
   Dart_Handle url = Dart_NewString("library1_url");
   Dart_Handle source = Dart_NewString(kLibrary1Chars);
 
@@ skipping 1227 matching lines @@
   EXPECT(Dart_IsString(str));
   len = -1;
   EXPECT_VALID(Dart_StringLength(str, &len));
   EXPECT_EQ(0, len);
 }
 
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart