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diff --git a/test/val/val_state_test.cpp b/test/val/val_state_test.cpp
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+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2016 Google Inc.
+//
+// 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 implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Unit tests for ValidationState_t.
+
+#include <vector>
+
+#include "gtest/gtest.h"
+#include "spirv/1.1/spirv.h"
+
+#include "enum_set.h"
+#include "val/construct.h"
+#include "val/function.h"
+#include "val/validation_state.h"
+#include "validate.h"
+
+namespace {
+using libspirv::CapabilitySet;
+using libspirv::ValidationState_t;
+using std::vector;
+
+// A test with a ValidationState_t member transparently.
+class ValidationStateTest : public testing::Test {
+ public:
+  ValidationStateTest()
+      : context_(spvContextCreate(SPV_ENV_UNIVERSAL_1_0)), state_(context_) {}
+
+ protected:
+  spv_context context_;
+  ValidationState_t state_;
+};
+
+// A test of ValidationState_t::HasAnyOf().
+using ValidationState_HasAnyOfTest = ValidationStateTest;
+
+TEST_F(ValidationState_HasAnyOfTest, EmptyMask) {
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityMatrix);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityImageMipmap);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityPipes);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityStorageImageArrayDynamicIndexing);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityClipDistance);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+  state_.RegisterCapability(SpvCapabilityStorageImageWriteWithoutFormat);
+  EXPECT_TRUE(state_.HasAnyOf({}));
+}
+
+TEST_F(ValidationState_HasAnyOfTest, SingleCapMask) {
+  EXPECT_FALSE(state_.HasAnyOf({SpvCapabilityMatrix}));
+  EXPECT_FALSE(state_.HasAnyOf({SpvCapabilityImageMipmap}));
+  state_.RegisterCapability(SpvCapabilityMatrix);
+  EXPECT_TRUE(state_.HasAnyOf({SpvCapabilityMatrix}));
+  EXPECT_FALSE(state_.HasAnyOf({SpvCapabilityImageMipmap}));
+  state_.RegisterCapability(SpvCapabilityImageMipmap);
+  EXPECT_TRUE(state_.HasAnyOf({SpvCapabilityMatrix}));
+  EXPECT_TRUE(state_.HasAnyOf({SpvCapabilityImageMipmap}));
+}
+
+TEST_F(ValidationState_HasAnyOfTest, MultiCapMask) {
+  const auto set1 =
+      CapabilitySet{SpvCapabilitySampledRect, SpvCapabilityImageBuffer};
+  const auto set2 = CapabilitySet{SpvCapabilityStorageImageWriteWithoutFormat,
+                                  SpvCapabilityStorageImageReadWithoutFormat,
+                                  SpvCapabilityGeometryStreams};
+  EXPECT_FALSE(state_.HasAnyOf(set1));
+  EXPECT_FALSE(state_.HasAnyOf(set2));
+  state_.RegisterCapability(SpvCapabilityImageBuffer);
+  EXPECT_TRUE(state_.HasAnyOf(set1));
+  EXPECT_FALSE(state_.HasAnyOf(set2));
+}
+}