1 files changed, 140 insertions, 0 deletions
diff --git a/src/amberscript/parser_blend_test.cc b/src/amberscript/parser_blend_test.cc
new file mode 100644
index 0000000..013ccbd
--- /dev/null
+++ b/src/amberscript/parser_blend_test.cc
@@ -0,0 +1,140 @@
+// Copyright 2021 The Amber Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or parseried.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "gtest/gtest.h"
+#include "src/amberscript/parser.h"
+
+namespace amber {
+namespace amberscript {
+
+using AmberScriptParserTest = testing::Test;
+
+TEST_F(AmberScriptParserTest, BlendAllValues) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+
+  BLEND
+    SRC_COLOR_FACTOR src_alpha
+    DST_COLOR_FACTOR one_minus_src_alpha
+    COLOR_OP add
+    SRC_ALPHA_FACTOR one
+    DST_ALPHA_FACTOR zero
+    ALPHA_OP max
+  END
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+
+  ASSERT_TRUE(pipeline->GetPipelineData()->GetEnableBlend());
+  ASSERT_EQ(BlendFactor::kSrcAlpha,
+            pipeline->GetPipelineData()->GetSrcColorBlendFactor());
+  ASSERT_EQ(BlendFactor::kOneMinusSrcAlpha,
+            pipeline->GetPipelineData()->GetDstColorBlendFactor());
+  ASSERT_EQ(BlendOp::kAdd,
+            pipeline->GetPipelineData()->GetColorBlendOp());
+
+  ASSERT_EQ(BlendFactor::kOne,
+            pipeline->GetPipelineData()->GetSrcAlphaBlendFactor());
+  ASSERT_EQ(BlendFactor::kZero,
+            pipeline->GetPipelineData()->GetDstAlphaBlendFactor());
+  ASSERT_EQ(BlendOp::kMax,
+            pipeline->GetPipelineData()->GetAlphaBlendOp());
+}
+
+TEST_F(AmberScriptParserTest, BlendDefaultValues) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+
+  BLEND
+  END
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+
+  ASSERT_TRUE(pipeline->GetPipelineData()->GetEnableBlend());
+  ASSERT_EQ(BlendFactor::kOne,
+            pipeline->GetPipelineData()->GetSrcColorBlendFactor());
+  ASSERT_EQ(BlendFactor::kZero,
+            pipeline->GetPipelineData()->GetDstColorBlendFactor());
+  ASSERT_EQ(BlendOp::kAdd,
+            pipeline->GetPipelineData()->GetColorBlendOp());
+
+  ASSERT_EQ(BlendFactor::kOne,
+            pipeline->GetPipelineData()->GetSrcAlphaBlendFactor());
+  ASSERT_EQ(BlendFactor::kZero,
+            pipeline->GetPipelineData()->GetDstAlphaBlendFactor());
+  ASSERT_EQ(BlendOp::kAdd,
+            pipeline->GetPipelineData()->GetAlphaBlendOp());
+}
+
+TEST_F(AmberScriptParserTest, BlendInvalidColorFactor) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+
+  BLEND
+    SRC_COLOR_FACTOR foo
+  END
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("14: BLEND invalid value for SRC_COLOR_FACTOR: foo", r.Error());
+}
+
+}  // namespace amberscript
+}  // namespace amber