Source/bindings/v8/ScriptPromiseResolverTest.cpp

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#include "config.h"
#include "bindings/v8/ScriptPromiseResolver.h"

#include "bindings/v8/ScriptPromise.h"
#include "bindings/v8/V8Binding.h"

#include <gtest/gtest.h>
#include <v8.h>

namespace WebCore {

namespace {

class Function : public ScriptFunction {
public:
    static PassOwnPtr<Function> create(v8::Isolate* isolate, String* value)
    {
        return adoptPtr(new Function(isolate, value));
    }

    virtual ScriptValue call(ScriptValue value) OVERRIDE
    {
        ASSERT(!value.isEmpty());
        *m_value = toCoreString(value.v8Value()->ToString());
        return value;
    }

private:
    Function(v8::Isolate* isolate, String* value) : ScriptFunction(isolate), m_value(value) { }

    String* m_value;
};

class ScriptPromiseResolverTest : public testing::Test {
public:
    ScriptPromiseResolverTest()
        : m_scope(v8::Isolate::GetCurrent())
    {
        m_resolver = ScriptPromiseResolver::create(m_scope.scriptState());
    }

    virtual ~ScriptPromiseResolverTest()
    {
        // Run all pending microtasks here.
        isolate()->RunMicrotasks();
    }

    v8::Isolate* isolate() { return m_scope.isolate(); }

protected:
    RefPtr<ScriptPromiseResolver> m_resolver;
    V8TestingScope m_scope;
};

TEST_F(ScriptPromiseResolverTest, initialState)
{
    ScriptPromise promise = m_resolver->promise();
    ASSERT_FALSE(promise.isEmpty());
    String onFulfilled, onRejected;
    promise.then(Function::create(isolate(), &onFulfilled), Function::create(isolate(), &onRejected));

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);

    isolate()->RunMicrotasks();

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);
}

TEST_F(ScriptPromiseResolverTest, resolve)
{
    ScriptPromise promise = m_resolver->promise();
    ASSERT_FALSE(promise.isEmpty());
    String onFulfilled, onRejected;
    promise.then(Function::create(isolate(), &onFulfilled), Function::create(isolate(), &onRejected));

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->resolve("hello");
    EXPECT_TRUE(m_resolver->promise().isEmpty());
    isolate()->RunMicrotasks();

    EXPECT_EQ("hello", onFulfilled);
    EXPECT_EQ(String(), onRejected);
}

TEST_F(ScriptPromiseResolverTest, reject)
{
    ScriptPromise promise = m_resolver->promise();
    ASSERT_FALSE(promise.isEmpty());
    String onFulfilled, onRejected;
    promise.then(Function::create(isolate(), &onFulfilled), Function::create(isolate(), &onRejected));

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->reject("hello");
    EXPECT_TRUE(m_resolver->promise().isEmpty());
    isolate()->RunMicrotasks();

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ("hello", onRejected);
}

TEST_F(ScriptPromiseResolverTest, resolveOverResolve)
{
    ScriptPromise promise = m_resolver->promise();
    ASSERT_FALSE(promise.isEmpty());
    String onFulfilled, onRejected;
    promise.then(Function::create(isolate(), &onFulfilled), Function::create(isolate(), &onRejected));

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->resolve("hello");
    EXPECT_TRUE(m_resolver->promise().isEmpty());
    isolate()->RunMicrotasks();

    EXPECT_EQ("hello", onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->resolve("world");
    isolate()->RunMicrotasks();

    EXPECT_EQ("hello", onFulfilled);
    EXPECT_EQ(String(), onRejected);
}

TEST_F(ScriptPromiseResolverTest, rejectOverResolve)
{
    ScriptPromise promise = m_resolver->promise();
    ASSERT_FALSE(promise.isEmpty());
    String onFulfilled, onRejected;
    promise.then(Function::create(isolate(), &onFulfilled), Function::create(isolate(), &onRejected));

    EXPECT_EQ(String(), onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->resolve("hello");
    EXPECT_TRUE(m_resolver->promise().isEmpty());
    isolate()->RunMicrotasks();

    EXPECT_EQ("hello", onFulfilled);
    EXPECT_EQ(String(), onRejected);

    m_resolver->reject("world");
    isolate()->RunMicrotasks();

    EXPECT_EQ("hello", onFulfilled);
    EXPECT_EQ(String(), onRejected);
}

} // namespace

} // namespace WebCore