// Copyright 2020 The Dawn & Tint Authors
//
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#include "src/tint/lang/msl/writer/ast_printer/helper_test.h"

namespace tint::msl::writer {
namespace {

using MslASTPrinterTest = TestHelper;

// MSLPrinterTest.If
TEST_F(MslASTPrinterTest, Emit_If) {
    auto* cond = Var("cond", ty.bool_());
    auto* i = If(cond, Block(Return()));
    WrapInFunction(cond, i);

    ASTPrinter& gen = Build();

    gen.IncrementIndent();

    ASSERT_TRUE(gen.EmitStatement(i)) << gen.Diagnostics();
    EXPECT_EQ(gen.Result(), R"(  if (cond) {
    return;
  }
)");
}

// MSLPrinterTest.IfWithElseIf
TEST_F(MslASTPrinterTest, Emit_IfWithElseIf) {
    auto* cond = Var("cond", ty.bool_());
    auto* else_cond = Var("else_cond", ty.bool_());
    auto* i = If(cond, Block(Return()), Else(If(else_cond, Block(Return()))));
    WrapInFunction(cond, else_cond, i);

    ASTPrinter& gen = Build();

    gen.IncrementIndent();

    ASSERT_TRUE(gen.EmitStatement(i)) << gen.Diagnostics();
    EXPECT_EQ(gen.Result(), R"(  if (cond) {
    return;
  } else {
    if (else_cond) {
      return;
    }
  }
)");
}

// MSLPrinterTest.IfWithElse
TEST_F(MslASTPrinterTest, Emit_IfWithElse) {
    auto* cond = Var("cond", ty.bool_());
    auto* i = If(cond, Block(Return()), Else(Block(Return())));
    WrapInFunction(cond, i);

    ASTPrinter& gen = Build();

    gen.IncrementIndent();

    ASSERT_TRUE(gen.EmitStatement(i)) << gen.Diagnostics();
    EXPECT_EQ(gen.Result(), R"(  if (cond) {
    return;
  } else {
    return;
  }
)");
}

// TODO(dj2): Port to MSLPrinterTest
TEST_F(MslASTPrinterTest, Emit_IfWithMultiple) {
    auto* cond = Var("cond", ty.bool_());
    auto* else_cond = Var("else_cond", ty.bool_());
    auto* i =
        If(cond, Block(Return()), Else(If(else_cond, Block(Return()), Else(Block(Return())))));
    WrapInFunction(cond, else_cond, i);

    ASTPrinter& gen = Build();

    gen.IncrementIndent();

    ASSERT_TRUE(gen.EmitStatement(i)) << gen.Diagnostics();
    EXPECT_EQ(gen.Result(), R"(  if (cond) {
    return;
  } else {
    if (else_cond) {
      return;
    } else {
      return;
    }
  }
)");
}

}  // namespace
}  // namespace tint::msl::writer