//
// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

#include "PreprocessorTest.h"
#include "compiler/preprocessor/Token.h"

class PragmaTest : public PreprocessorTest
{
};

TEST_F(PragmaTest, EmptyName)
{
    const char* str = "#pragma\n";
    const char* expected = "\n";

    using testing::_;
    // No handlePragma calls.
    EXPECT_CALL(mDirectiveHandler, handlePragma(_, _, _, false)).Times(0);
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, EmptyValue)
{
    const char* str = "#pragma foo\n";
    const char* expected = "\n";

    using testing::_;
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(pp::SourceLocation(0, 1), "foo", "", false));
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, NameValue)
{
    const char* str = "#pragma foo(bar)\n";
    const char* expected = "\n";

    using testing::_;
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(pp::SourceLocation(0, 1), "foo", "bar", false));
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, STDGL)
{
    const char* str = "#pragma STDGL\n";
    const char* expected = "\n";

    using testing::_;
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(_, _, _, _)).Times(0);
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, STDGLInvariantAll)
{
    const char* str = "#pragma STDGL invariant(all)\n";
    const char* expected = "\n";

    using testing::_;
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(pp::SourceLocation(0, 1), "invariant", "all", true));
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, Comments)
{
    const char* str = "/*foo*/"
                      "#"
                      "/*foo*/"
                      "pragma"
                      "/*foo*/"
                      "foo"
                      "/*foo*/"
                      "("
                      "/*foo*/"
                      "bar"
                      "/*foo*/"
                      ")"
                      "/*foo*/"
                      "//foo"
                      "\n";
    const char* expected = "\n";

    using testing::_;
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(pp::SourceLocation(0, 1), "foo", "bar", false));
    // No error or warning.
    EXPECT_CALL(mDiagnostics, print(_, _, _)).Times(0);

    preprocess(str, expected);
}

TEST_F(PragmaTest, MissingNewline)
{
    const char* str = "#pragma foo(bar)";
    const char* expected = "";

    using testing::_;
    // Pragma successfully parsed.
    EXPECT_CALL(mDirectiveHandler,
                handlePragma(pp::SourceLocation(0, 1), "foo", "bar", false));
    // Error reported about EOF.
    EXPECT_CALL(mDiagnostics, print(pp::Diagnostics::PP_EOF_IN_DIRECTIVE, _, _));

    preprocess(str, expected);
}

class InvalidPragmaTest : public PragmaTest,
                          public testing::WithParamInterface<const char*>
{
};

TEST_P(InvalidPragmaTest, Identified)
{
    const char* str = GetParam();
    const char* expected = "\n";

    using testing::_;
    // No handlePragma calls.
    EXPECT_CALL(mDirectiveHandler, handlePragma(_, _, _, false)).Times(0);
    // Unrecognized pragma warning.
    EXPECT_CALL(mDiagnostics,
                print(pp::Diagnostics::PP_UNRECOGNIZED_PRAGMA,
                      pp::SourceLocation(0, 1), _));

    preprocess(str, expected);
}

INSTANTIATE_TEST_CASE_P(All, InvalidPragmaTest, testing::Values(
    "#pragma 1\n",               // Invalid name.
    "#pragma foo()\n",           // Missing value.
    "#pragma foo bar)\n",        // Missing left paren,
    "#pragma foo(bar\n",         // Missing right paren.
    "#pragma foo bar\n",         // Missing parens.
    "#pragma foo(bar) baz\n"));  // Extra tokens.