First debugger API unit test

runtime/vm/debugger_api_impl_test.cc

+// Copyright (c) 2011, 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_debugger_api.h"
+
+#include "vm/assert.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+#if defined(TARGET_ARCH_IA32)  // Only ia32 can run execution tests.
+
+
+static bool breakpoint_hit = false;
+
+static const bool verbose = false;
+
+#define BARK_IF_ERROR(handle)                       \
+  if (Dart_IsError(handle)) {                       \
+    printf("Error: %s\n", Dart_GetError(handle));   \
+  }
+
+
+void TestBreakpointHandler(Dart_Breakpoint bpt, Dart_StackTrace trace) {
+  const char* expected_trace[] = {"A.foo", "main"};
+  const intptr_t expected_trace_length = 2;
+  breakpoint_hit = true;
+  intptr_t trace_len;
+  Dart_Handle res = Dart_StackTraceLength(trace, &trace_len);
+  BARK_IF_ERROR(res);
+  EXPECT_EQ(expected_trace_length, trace_len);
+  for (int i = 0; i < trace_len; i++) {
+    Dart_ActivationFrame frame;
+    res = Dart_GetActivationFrame(trace, i, &frame);
+    BARK_IF_ERROR(res);

[siva, 2011/12/09 02:20:04]

EXPECT(!Dart_IsError(res)); ?

[hausner, 2011/12/13 00:14:59]

Done.

+    Dart_Handle func_name;
+    res = Dart_ActivationFrameInfo(frame, &func_name, NULL, NULL);
+    BARK_IF_ERROR(res);

[siva, 2011/12/09 02:20:04]

EXPECT(!Dart_IsError(res)); ?

[hausner, 2011/12/13 00:14:59]

Done.

+    EXPECT(Dart_IsString(func_name));
+    const char* name_chars;
+    Dart_StringToCString(func_name, &name_chars);
+    EXPECT_STREQ(expected_trace[i], name_chars);
+    if (verbose) printf("  >> %d: %s\n", i, name_chars);
+  }
+}
+
+
+UNIT_TEST_CASE(Breakpoint) {
+  const char* kScriptChars =
+      "void moo(s) { }\n"
+      "class A {\n"
+      "  static void foo() {\n"
+      "    moo('good news');\n"
+      "  }\n"
+      "}\n"
+      "void main() {\n"
+      "  A.foo();\n"
+      "}\n";
+
+  TestIsolateScope __test_isolate__;
+
+  Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
+  EXPECT(!Dart_IsError(lib));
+
+  Dart_SetBreakpointHandler(&TestBreakpointHandler);
+
+  Dart_Handle c_name = Dart_NewString("A");
+  Dart_Handle f_name = Dart_NewString("foo");
+  Dart_Breakpoint bpt;
+  Dart_Handle res = Dart_SetBreakpointAtEntry(lib, c_name, f_name, &bpt);
+  BARK_IF_ERROR(res);

[siva, 2011/12/09 02:20:04]

Is this BARK stuff here for debugging purposes? :-)

[hausner, 2011/12/13 00:14:59]

I'd like to keep it since it prints the error message if there is an error. 
Renamed to EXPECT_NOT_ERROR and included the EXPECT(!Dart_IsError( )).

+  EXPECT(!Dart_IsError(res));
+
+  breakpoint_hit = false;
+  Dart_Handle retval = Dart_InvokeStatic(lib,
+                           Dart_NewString(""),
+                           Dart_NewString("main"),
+                           0,
+                           NULL);
+  EXPECT(!Dart_IsError(retval));
+  EXPECT(breakpoint_hit == true);
+}
+
+#endif  // TARGET_ARCH_IA32.
+
+}  // namespace dart