COMPMID-562: Port Schaar to new validation

Change-Id: Ia59c5ac7b6ab7a53fb73103539984e310b918fca
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/94616
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>

8 files changed, 659 insertions, 0 deletions

diff --git a/tests/Types.h b/tests/Types.h
index 8f47902e3e..acd82afb60 100644
--- a/tests/Types.h
+++ b/tests/Types.h
@@ -42,6 +42,14 @@ enum class FixedPointOp
     RECIPROCAL /**< Reciprocal */
 };
 
+/** Gradient dimension type. */
+enum class GradientDimension
+{
+    GRAD_X,  /**< x gradient dimension */
+    GRAD_Y,  /**< y gradient dimension */
+    GRAD_XY, /**< x and y gradient dimension */
+};
+
 template <typename MinMaxType>
 struct MinMaxLocationValues
 {
diff --git a/tests/datasets/GradientDimensionDataset.h b/tests/datasets/GradientDimensionDataset.h
new file mode 100644
index 0000000000..b00c666c74
--- /dev/null
+++ b/tests/datasets/GradientDimensionDataset.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_TEST_GRADIENT_DIMENSION_DATASET_H__
+#define __ARM_COMPUTE_TEST_GRADIENT_DIMENSION_DATASET_H__
+
+#include "tests/Types.h"
+#include "tests/framework/datasets/ContainerDataset.h"
+
+#include <vector>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace datasets
+{
+class GradientDimensions final : public framework::dataset::ContainerDataset<std::vector<GradientDimension>>
+{
+public:
+    GradientDimensions()
+        : ContainerDataset("GradientDimension",
+    {
+        GradientDimension::GRAD_X,
+                          GradientDimension::GRAD_Y,
+                          GradientDimension::GRAD_XY
+    })
+    {
+    }
+};
+} // namespace datasets
+} // namespace test
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_TEST_GRADIENT_DIMENSION_DATASET_H__ */
diff --git a/tests/validation/CL/Scharr.cpp b/tests/validation/CL/Scharr.cpp
new file mode 100644
index 0000000000..1b44a574e9
--- /dev/null
+++ b/tests/validation/CL/Scharr.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/runtime/CL/functions/CLScharr3x3.h"
+#include "tests/CL/CLAccessor.h"
+#include "tests/PaddingCalculator.h"
+#include "tests/datasets/BorderModeDataset.h"
+#include "tests/datasets/GradientDimensionDataset.h"
+#include "tests/datasets/ShapeDatasets.h"
+#include "tests/framework/Macros.h"
+#include "tests/framework/datasets/Datasets.h"
+#include "tests/validation/Validation.h"
+#include "tests/validation/fixtures/ScharrFixture.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+TEST_SUITE(CL)
+TEST_SUITE(Scharr)
+
+TEST_SUITE(W3x3)
+using CLScharr3x3Fixture = ScharrValidationFixture<CLTensor, CLAccessor, CLScharr3x3, uint8_t, int16_t>;
+
+DATA_TEST_CASE(Configuration, framework::DatasetMode::ALL, combine(combine(concat(datasets::Small2DShapes(), datasets::Large2DShapes()), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                   Format::U8)),
+               shape, border_mode, format)
+{
+    // Generate a random constant value
+    std::mt19937                           gen(library->seed());
+    std::uniform_int_distribution<uint8_t> int_dist(0, 255);
+    const uint8_t                          constant_border_value = int_dist(gen);
+
+    // Create tensors
+    CLTensor src   = create_tensor<CLTensor>(shape, data_type_from_format(format));
+    CLTensor dst_x = create_tensor<CLTensor>(shape, DataType::S16);
+    CLTensor dst_y = create_tensor<CLTensor>(shape, DataType::S16);
+
+    src.info()->set_format(format);
+    dst_x.info()->set_format(Format::S16);
+    dst_y.info()->set_format(Format::S16);
+
+    ARM_COMPUTE_EXPECT(src.info()->is_resizable(), framework::LogLevel::ERRORS);
+    ARM_COMPUTE_EXPECT(dst_x.info()->is_resizable(), framework::LogLevel::ERRORS);
+    ARM_COMPUTE_EXPECT(dst_y.info()->is_resizable(), framework::LogLevel::ERRORS);
+
+    // Create scharr 3x3 configure function
+    CLScharr3x3 scharr;
+    scharr.configure(&src, &dst_x, &dst_y, border_mode, constant_border_value);
+
+    // Validate valid region
+    constexpr BorderSize border_size{ 1 };
+    const ValidRegion    dst_valid_region = shape_to_valid_region(shape, border_mode == BorderMode::UNDEFINED, border_size);
+
+    validate(dst_x.info()->valid_region(), dst_valid_region);
+    validate(dst_y.info()->valid_region(), dst_valid_region);
+
+    // Validate padding
+    PaddingCalculator calculator(shape.x(), 8);
+
+    calculator.set_border_mode(border_mode);
+    calculator.set_border_size(1);
+
+    const PaddingSize dst_padding = calculator.required_padding();
+
+    calculator.set_accessed_elements(16);
+    calculator.set_access_offset(-1);
+
+    const PaddingSize src_padding = calculator.required_padding();
+
+    validate(src.info()->padding(), src_padding);
+    validate(dst_x.info()->padding(), dst_padding);
+    validate(dst_y.info()->padding(), dst_padding);
+}
+
+FIXTURE_DATA_TEST_CASE(RunSmall, CLScharr3x3Fixture, framework::DatasetMode::PRECOMMIT, combine(combine(combine(datasets::Small2DShapes(), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                                                        Format::U8)),
+                                                                                                datasets::GradientDimensions()))
+{
+    // Validate output
+    ValidRegion valid_region_x = shape_to_valid_region(_reference.first.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(CLAccessor(_target.first), _reference.first, valid_region_x);
+
+    ValidRegion valid_region_y = shape_to_valid_region(_reference.second.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(CLAccessor(_target.second), _reference.second, valid_region_y);
+}
+
+FIXTURE_DATA_TEST_CASE(RunLarge, CLScharr3x3Fixture, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::Large2DShapes(), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                                                      Format::U8)),
+                                                                                              datasets::GradientDimensions()))
+{
+    // Validate output
+    ValidRegion valid_region_x = shape_to_valid_region(_reference.first.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(CLAccessor(_target.first), _reference.first, valid_region_x);
+
+    ValidRegion valid_region_y = shape_to_valid_region(_reference.second.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(CLAccessor(_target.second), _reference.second, valid_region_y);
+}
+TEST_SUITE_END()
+
+TEST_SUITE_END()
+TEST_SUITE_END()
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
diff --git a/tests/validation/CPP/Scharr.cpp b/tests/validation/CPP/Scharr.cpp
new file mode 100644
index 0000000000..98e4d62dba
--- /dev/null
+++ b/tests/validation/CPP/Scharr.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "Scharr.h"
+
+#include "Utils.h"
+#include "tests/validation/Helpers.h"
+
+#include <array>
+#include <map>
+#include <utility>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+namespace
+{
+const std::array<int8_t, 9> scharr_3_x{ { -3, 0, 3, -10, 0, 10, -3, 0, 3 } };
+const std::array<int8_t, 9> scharr_3_y{ { -3, -10, -3, 0, 0, 0, 3, 10, 3 } };
+
+const std::map<int, std::pair<const int8_t *, const int8_t *>> masks
+{
+    { 3, { scharr_3_x.data(), scharr_3_y.data() } }
+};
+
+template <typename T>
+struct data_type;
+
+template <>
+struct data_type<int16_t>
+{
+    const static DataType value = DataType::S16;
+};
+} // namespace
+
+template <typename T, typename U>
+std::pair<SimpleTensor<T>, SimpleTensor<T>> scharr(const SimpleTensor<U> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value, GradientDimension gradient_dimension)
+{
+    const auto shape_size = static_cast<unsigned int>(filter_size);
+
+    SimpleTensor<T> dst_x(src.shape(), data_type<T>::value, src.num_channels());
+    SimpleTensor<T> dst_y(src.shape(), data_type<T>::value, src.num_channels());
+
+    ValidRegion valid_region = shape_to_valid_region(src.shape(), border_mode == BorderMode::UNDEFINED, BorderSize(filter_size / 2));
+
+    for(int i = 0; i < src.num_elements(); ++i)
+    {
+        Coordinates coord = index2coord(src.shape(), i);
+
+        if(!is_in_valid_region(valid_region, coord))
+        {
+            continue;
+        }
+
+        switch(gradient_dimension)
+        {
+            case GradientDimension::GRAD_X:
+                apply_2d_spatial_filter(coord, src, dst_x, TensorShape{ shape_size, shape_size }, masks.at(filter_size).first, 1.f, border_mode, constant_border_value);
+                break;
+            case GradientDimension::GRAD_Y:
+                apply_2d_spatial_filter(coord, src, dst_y, TensorShape{ shape_size, shape_size }, masks.at(filter_size).second, 1.f, border_mode, constant_border_value);
+                break;
+            case GradientDimension::GRAD_XY:
+                apply_2d_spatial_filter(coord, src, dst_x, TensorShape{ shape_size, shape_size }, masks.at(filter_size).first, 1.f, border_mode, constant_border_value);
+                apply_2d_spatial_filter(coord, src, dst_y, TensorShape{ shape_size, shape_size }, masks.at(filter_size).second, 1.f, border_mode, constant_border_value);
+                break;
+            default:
+                ARM_COMPUTE_ERROR("Gradient dimension not supported");
+        }
+    }
+
+    return std::make_pair(dst_x, dst_y);
+}
+
+template std::pair<SimpleTensor<int16_t>, SimpleTensor<int16_t>> scharr(const SimpleTensor<uint8_t> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value,
+                                                                        GradientDimension gradient_dimension);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
diff --git a/tests/validation/CPP/Scharr.h b/tests/validation/CPP/Scharr.h
new file mode 100644
index 0000000000..8f383811cf
--- /dev/null
+++ b/tests/validation/CPP/Scharr.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_TEST_SCHARR_H__
+#define __ARM_COMPUTE_TEST_SCHARR_H__
+
+#include "tests/SimpleTensor.h"
+#include "tests/Types.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T, typename U>
+std::pair<SimpleTensor<T>, SimpleTensor<T>> scharr(const SimpleTensor<U> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value, GradientDimension gradient_dimension);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_TEST_SCHARR_H__ */
diff --git a/tests/validation/NEON/Schaar.cpp b/tests/validation/NEON/Schaar.cpp
new file mode 100644
index 0000000000..0b96eee70e
--- /dev/null
+++ b/tests/validation/NEON/Schaar.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/runtime/NEON/functions/NEScharr3x3.h"
+#include "tests/NEON/Accessor.h"
+#include "tests/PaddingCalculator.h"
+#include "tests/datasets/BorderModeDataset.h"
+#include "tests/datasets/GradientDimensionDataset.h"
+#include "tests/datasets/ShapeDatasets.h"
+#include "tests/framework/Macros.h"
+#include "tests/framework/datasets/Datasets.h"
+#include "tests/validation/Validation.h"
+#include "tests/validation/fixtures/ScharrFixture.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+TEST_SUITE(NEON)
+TEST_SUITE(Scharr)
+
+TEST_SUITE(W3x3)
+using NEScharr3x3Fixture = ScharrValidationFixture<Tensor, Accessor, NEScharr3x3, uint8_t, int16_t>;
+
+DATA_TEST_CASE(Configuration, framework::DatasetMode::ALL, combine(combine(concat(datasets::Small2DShapes(), datasets::Large2DShapes()), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                   Format::U8)),
+               shape, border_mode, format)
+{
+    // Generate a random constant value
+    std::mt19937                           gen(library->seed());
+    std::uniform_int_distribution<uint8_t> int_dist(0, 255);
+    const uint8_t                          constant_border_value = int_dist(gen);
+
+    // Create tensors
+    Tensor src   = create_tensor<Tensor>(shape, data_type_from_format(format));
+    Tensor dst_x = create_tensor<Tensor>(shape, DataType::S16);
+    Tensor dst_y = create_tensor<Tensor>(shape, DataType::S16);
+
+    src.info()->set_format(format);
+    dst_x.info()->set_format(Format::S16);
+    dst_y.info()->set_format(Format::S16);
+
+    ARM_COMPUTE_EXPECT(src.info()->is_resizable(), framework::LogLevel::ERRORS);
+    ARM_COMPUTE_EXPECT(dst_x.info()->is_resizable(), framework::LogLevel::ERRORS);
+    ARM_COMPUTE_EXPECT(dst_y.info()->is_resizable(), framework::LogLevel::ERRORS);
+
+    // Create scharr 3x3 configure function
+    NEScharr3x3 scharr;
+    scharr.configure(&src, &dst_x, &dst_y, border_mode, constant_border_value);
+
+    // Validate valid region
+    constexpr BorderSize border_size{ 1 };
+    const ValidRegion    dst_valid_region = shape_to_valid_region(shape, border_mode == BorderMode::UNDEFINED, border_size);
+
+    validate(dst_x.info()->valid_region(), dst_valid_region);
+    validate(dst_y.info()->valid_region(), dst_valid_region);
+
+    // Validate padding
+    PaddingCalculator calculator(shape.x(), 8);
+
+    calculator.set_border_mode(border_mode);
+    calculator.set_border_size(1);
+
+    const PaddingSize dst_padding = calculator.required_padding();
+
+    calculator.set_accessed_elements(16);
+    calculator.set_access_offset(-1);
+
+    const PaddingSize src_padding = calculator.required_padding();
+
+    validate(src.info()->padding(), src_padding);
+    validate(dst_x.info()->padding(), dst_padding);
+    validate(dst_y.info()->padding(), dst_padding);
+}
+
+FIXTURE_DATA_TEST_CASE(RunSmall, NEScharr3x3Fixture, framework::DatasetMode::PRECOMMIT, combine(combine(combine(datasets::Small2DShapes(), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                                                        Format::U8)),
+                                                                                                datasets::GradientDimensions()))
+{
+    // Validate output
+    ValidRegion valid_region_x = shape_to_valid_region(_reference.first.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(Accessor(_target.first), _reference.first, valid_region_x);
+
+    ValidRegion valid_region_y = shape_to_valid_region(_reference.second.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(Accessor(_target.second), _reference.second, valid_region_y);
+}
+
+FIXTURE_DATA_TEST_CASE(RunLarge, NEScharr3x3Fixture, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::Large2DShapes(), datasets::BorderModes()), framework::dataset::make("Format",
+                                                                                                      Format::U8)),
+                                                                                              datasets::GradientDimensions()))
+{
+    // Validate output
+    ValidRegion valid_region_x = shape_to_valid_region(_reference.first.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(Accessor(_target.first), _reference.first, valid_region_x);
+
+    ValidRegion valid_region_y = shape_to_valid_region(_reference.second.shape(), (_border_mode == BorderMode::UNDEFINED), BorderSize(1));
+    validate(Accessor(_target.second), _reference.second, valid_region_y);
+}
+TEST_SUITE_END()
+
+TEST_SUITE_END()
+TEST_SUITE_END()
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
diff --git a/tests/validation/fixtures/ScharrFixture.h b/tests/validation/fixtures/ScharrFixture.h
new file mode 100644
index 0000000000..f432f85032
--- /dev/null
+++ b/tests/validation/fixtures/ScharrFixture.h
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_TEST_SCHARR_FIXTURE
+#define ARM_COMPUTE_TEST_SCHARR_FIXTURE
+
+#include "tests/Globals.h"
+#include "tests/IAccessor.h"
+#include "tests/Types.h"
+#include "tests/framework/Asserts.h"
+#include "tests/framework/Fixture.h"
+#include "tests/validation/CPP/Scharr.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+class CLScharr3x3;
+class NEScharr3x3;
+
+namespace test
+{
+namespace validation
+{
+namespace
+{
+template <typename Function>
+struct info;
+
+template <>
+struct info<NEScharr3x3>
+{
+    static const Format dst_format  = Format::S16;
+    static const int    filter_size = 3;
+};
+
+template <>
+struct info<CLScharr3x3>
+{
+    static const Format dst_format  = Format::S16;
+    static const int    filter_size = 3;
+};
+} // namespace
+
+template <typename TensorType, typename AccessorType, typename FunctionType, typename T, typename U>
+class ScharrValidationFixture : public framework::Fixture
+{
+public:
+    template <typename...>
+    void setup(TensorShape shape, BorderMode border_mode, Format format, GradientDimension gradient_dimension)
+    {
+        // Generate a random constant value
+        std::mt19937                           gen(library->seed());
+        std::uniform_int_distribution<uint8_t> int_dist(0, 255);
+        const uint8_t                          constant_border_value = int_dist(gen);
+
+        _border_mode = border_mode;
+        _target      = compute_target(shape, border_mode, format, constant_border_value, gradient_dimension);
+        _reference   = compute_reference(shape, info<FunctionType>::filter_size, border_mode, format, constant_border_value, gradient_dimension);
+    }
+
+protected:
+    template <typename V>
+    void fill(V &&tensor)
+    {
+        library->fill_tensor_uniform(tensor, 0);
+    }
+
+    template <typename V>
+    void fill_zero(V &&tensor)
+    {
+        library->fill_tensor_uniform(tensor, 0, static_cast<U>(0), static_cast<U>(0));
+    }
+
+    std::pair<TensorType, TensorType> compute_target(const TensorShape &shape, BorderMode border_mode, Format format, uint8_t constant_border_value, GradientDimension gradient_dimension)
+    {
+        // Create tensors
+        TensorType src   = create_tensor<TensorType>(shape, data_type_from_format(format));
+        TensorType dst_x = create_tensor<TensorType>(shape, data_type_from_format(info<FunctionType>::dst_format));
+        TensorType dst_y = create_tensor<TensorType>(shape, data_type_from_format(info<FunctionType>::dst_format));
+
+        src.info()->set_format(format);
+        dst_x.info()->set_format(info<FunctionType>::dst_format);
+        dst_y.info()->set_format(info<FunctionType>::dst_format);
+
+        FunctionType scharr;
+
+        switch(gradient_dimension)
+        {
+            case GradientDimension::GRAD_X:
+                scharr.configure(&src, &dst_x, nullptr, border_mode, constant_border_value);
+                break;
+            case GradientDimension::GRAD_Y:
+                scharr.configure(&src, nullptr, &dst_y, border_mode, constant_border_value);
+                break;
+            case GradientDimension::GRAD_XY:
+                scharr.configure(&src, &dst_x, &dst_y, border_mode, constant_border_value);
+                break;
+            default:
+                ARM_COMPUTE_ERROR("Gradient dimension not supported");
+        }
+
+        ARM_COMPUTE_EXPECT(src.info()->is_resizable(), framework::LogLevel::ERRORS);
+        ARM_COMPUTE_EXPECT(dst_x.info()->is_resizable(), framework::LogLevel::ERRORS);
+        ARM_COMPUTE_EXPECT(dst_y.info()->is_resizable(), framework::LogLevel::ERRORS);
+
+        // Allocate tensors
+        src.allocator()->allocate();
+        dst_x.allocator()->allocate();
+        dst_y.allocator()->allocate();
+
+        ARM_COMPUTE_EXPECT(!src.info()->is_resizable(), framework::LogLevel::ERRORS);
+        ARM_COMPUTE_EXPECT(!dst_x.info()->is_resizable(), framework::LogLevel::ERRORS);
+        ARM_COMPUTE_EXPECT(!dst_y.info()->is_resizable(), framework::LogLevel::ERRORS);
+
+        // Fill tensors
+        fill(AccessorType(src));
+        fill_zero(AccessorType(dst_x));
+        fill_zero(AccessorType(dst_y));
+
+        // Compute function
+        scharr.run();
+
+        return std::make_pair(std::move(dst_x), std::move(dst_y));
+    }
+
+    std::pair<SimpleTensor<U>, SimpleTensor<U>> compute_reference(const TensorShape &shape, int filter_size, BorderMode border_mode, Format format, uint8_t constant_border_value,
+                                                                  GradientDimension gradient_dimension)
+    {
+        // Create reference
+        SimpleTensor<T> src{ shape, format };
+
+        // Fill reference
+        fill(src);
+
+        return reference::scharr<U>(src, filter_size, border_mode, constant_border_value, gradient_dimension);
+    }
+
+    BorderMode _border_mode{ BorderMode::UNDEFINED };
+    std::pair<TensorType, TensorType>           _target{};
+    std::pair<SimpleTensor<U>, SimpleTensor<U>> _reference{};
+};
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_SCHARR_FIXTURE */
diff --git a/utils/TypePrinter.h b/utils/TypePrinter.h
index 50da59329a..2d5c618bce 100644
--- a/utils/TypePrinter.h
+++ b/utils/TypePrinter.h
@@ -794,5 +794,33 @@ inline std::string to_string(const arm_compute::MagnitudeType &type)
     str << type;
     return str.str();
 }
+
+/** Formatted output of the GradientDimension type. */
+inline ::std::ostream &operator<<(::std::ostream &os, const GradientDimension &dim)
+{
+    switch(dim)
+    {
+        case GradientDimension::GRAD_X:
+            os << "GRAD_X";
+            break;
+        case GradientDimension::GRAD_Y:
+            os << "GRAD_Y";
+            break;
+        case GradientDimension::GRAD_XY:
+            os << "GRAD_XY";
+            break;
+        default:
+            ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
+    }
+
+    return os;
+}
+
+inline std::string to_string(const arm_compute::GradientDimension &type)
+{
+    std::stringstream str;
+    str << type;
+    return str.str();
+}
 } // namespace arm_compute
 #endif /* __ARM_COMPUTE_TEST_TYPE_PRINTER_H__ */