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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_devtools_gtest_DevTools__
#define mozilla_devtools_gtest_DevTools__
#include <utility>
#include "CoreDump.pb.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "js/Principals.h"
#include "js/UbiNode.h"
#include "js/UniquePtr.h"
#include "jsapi.h"
#include "jspubtd.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/devtools/HeapSnapshot.h"
#include "mozilla/dom/ChromeUtils.h"
#include "nsCRTGlue.h"
using namespace mozilla;
using namespace mozilla::devtools;
using namespace mozilla::dom;
using namespace testing;
// GTest fixture class that all of our tests derive from.
struct DevTools : public ::testing::Test {
bool _initialized;
JSContext* cx;
JS::Compartment* compartment;
JS::Zone* zone;
JS::PersistentRooted<JSObject*> global;
DevTools() : _initialized(false), cx(nullptr) {}
virtual void SetUp() {
MOZ_ASSERT(!_initialized);
cx = getContext();
if (!cx) return;
global.init(cx, createGlobal());
if (!global) return;
JS::EnterRealm(cx, global);
compartment = js::GetContextCompartment(cx);
zone = js::GetContextZone(cx);
_initialized = true;
}
JSContext* getContext() { return CycleCollectedJSContext::Get()->Context(); }
static void reportError(JSContext* cx, const char* message,
JSErrorReport* report) {
fprintf(stderr, "%s:%u:%s\n",
report->filename ? report->filename : "<no filename>",
(unsigned int)report->lineno, message);
}
static const JSClass* getGlobalClass() {
static const JSClass globalClass = {"global", JSCLASS_GLOBAL_FLAGS,
&JS::DefaultGlobalClassOps};
return &globalClass;
}
JSObject* createGlobal() {
/* Create the global object. */
JS::RealmOptions options;
return JS_NewGlobalObject(cx, getGlobalClass(), nullptr,
JS::FireOnNewGlobalHook, options);
}
virtual void TearDown() {
_initialized = false;
if (global) {
JS::LeaveRealm(cx, nullptr);
global = nullptr;
}
}
};
// Helper to define a test and ensure that the fixture is initialized properly.
#define DEF_TEST(name, body) \
TEST_F(DevTools, name) { \
ASSERT_TRUE(_initialized); \
body \
}
// Fake JS::ubi::Node implementation
class MOZ_STACK_CLASS FakeNode {
public:
JS::ubi::EdgeVector edges;
JS::Compartment* compartment;
JS::Zone* zone;
size_t size;
explicit FakeNode() : edges(), compartment(nullptr), zone(nullptr), size(1) {}
};
namespace JS {
namespace ubi {
template <>
class Concrete<FakeNode> : public Base {
const char16_t* typeName() const override { return concreteTypeName; }
js::UniquePtr<EdgeRange> edges(JSContext*, bool) const override {
return js::UniquePtr<EdgeRange>(js_new<PreComputedEdgeRange>(get().edges));
}
Size size(mozilla::MallocSizeOf) const override { return get().size; }
JS::Zone* zone() const override { return get().zone; }
JS::Compartment* compartment() const override { return get().compartment; }
protected:
explicit Concrete(FakeNode* ptr) : Base(ptr) {}
FakeNode& get() const { return *static_cast<FakeNode*>(ptr); }
public:
static const char16_t concreteTypeName[];
static void construct(void* storage, FakeNode* ptr) {
new (storage) Concrete(ptr);
}
};
const char16_t Concrete<FakeNode>::concreteTypeName[] = u"FakeNode";
} // namespace ubi
} // namespace JS
void AddEdge(FakeNode& node, FakeNode& referent,
const char16_t* edgeName = nullptr) {
char16_t* ownedEdgeName = nullptr;
if (edgeName) {
ownedEdgeName = NS_xstrdup(edgeName);
}
JS::ubi::Edge edge(ownedEdgeName, &referent);
ASSERT_TRUE(node.edges.append(std::move(edge)));
}
// Custom GMock Matchers
// Use the testing namespace to avoid static analysis failures in the gmock
// matcher classes that get generated from MATCHER_P macros.
namespace testing {
// Ensure that given node has the expected number of edges.
MATCHER_P2(EdgesLength, cx, expectedLength, "") {
auto edges = arg.edges(cx);
if (!edges) return false;
int actualLength = 0;
for (; !edges->empty(); edges->popFront()) actualLength++;
return Matcher<int>(Eq(expectedLength))
.MatchAndExplain(actualLength, result_listener);
}
// Get the nth edge and match it with the given matcher.
MATCHER_P3(Edge, cx, n, matcher, "") {
auto edges = arg.edges(cx);
if (!edges) return false;
int i = 0;
for (; !edges->empty(); edges->popFront()) {
if (i == n) {
return Matcher<const JS::ubi::Edge&>(matcher).MatchAndExplain(
edges->front(), result_listener);
}
i++;
}
return false;
}
// Ensures that two char16_t* strings are equal.
MATCHER_P(UTF16StrEq, str, "") { return NS_strcmp(arg, str) == 0; }
MATCHER_P(UniqueUTF16StrEq, str, "") { return NS_strcmp(arg.get(), str) == 0; }
MATCHER(UniqueIsNull, "") { return arg.get() == nullptr; }
// Matches an edge whose referent is the node with the given id.
MATCHER_P(EdgeTo, id, "") {
return Matcher<const DeserializedEdge&>(
Field(&DeserializedEdge::referent, id))
.MatchAndExplain(arg, result_listener);
}
} // namespace testing
// A mock `Writer` class to be used with testing `WriteHeapGraph`.
class MockWriter : public CoreDumpWriter {
public:
virtual ~MockWriter() override {}
MOCK_METHOD2(writeNode,
bool(const JS::ubi::Node&, CoreDumpWriter::EdgePolicy));
MOCK_METHOD1(writeMetadata, bool(uint64_t));
};
void ExpectWriteNode(MockWriter& writer, FakeNode& node) {
EXPECT_CALL(writer, writeNode(Eq(JS::ubi::Node(&node)), _))
.Times(1)
.WillOnce(Return(true));
}
#endif // mozilla_devtools_gtest_DevTools__
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