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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/hid/hid_device.h"
#include "services/device/public/mojom/hid.mojom-blink.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
namespace {
// Construct and return a sample HID report item.
device::mojom::blink::HidReportItemPtr MakeReportItem() {
auto item = device::mojom::blink::HidReportItem::New();
item->is_range = false; // Usages for this item are defined by |usages|.
// Configure the report item with reasonable values for a button-like input.
item->is_constant = false; // Data.
item->is_variable = true; // Variable.
item->is_relative = false; // Absolute.
item->wrap = false; // No wrap.
item->is_non_linear = false; // Linear.
item->no_preferred_state = false; // Preferred State.
item->has_null_position = false; // No Null position.
item->is_volatile = false; // Non Volatile.
item->is_buffered_bytes = false; // Bit Field.
// Assign the primary button usage to this item.
item->usages.push_back(device::mojom::blink::HidUsageAndPage::New(
0x01, device::mojom::blink::kPageButton));
// |usage_minimum| and |usage_maximum| are unused.
item->usage_minimum = device::mojom::blink::HidUsageAndPage::New(0, 0);
item->usage_maximum = device::mojom::blink::HidUsageAndPage::New(0, 0);
// Set the designator index and string index extents to zero. This indicates
// that no physical designators or strings are associated with this item.
item->designator_minimum = 0;
item->designator_minimum = 0;
item->string_minimum = 0;
item->string_maximum = 0;
// The report field described by this item can only hold the logical values 0
// and 1.
item->logical_minimum = 0;
item->logical_maximum = 1;
item->physical_minimum = 0;
item->physical_maximum = 1;
// Values reported in this field are unitless.
item->unit_exponent = 0;
item->unit = 0;
// This item defines a single report field, 8 bits wide.
item->report_size = 8; // 1 byte.
item->report_count = 1;
return item;
}
} // namespace
TEST(HIDDeviceTest, singleUsageItem) {
device::mojom::blink::HidReportItemPtr mojo_item = MakeReportItem();
HIDReportItem* item = HIDDevice::ToHIDReportItem(*mojo_item);
// Check that all item properties are correctly converted for the sample
// report item.
EXPECT_TRUE(item->isAbsolute());
EXPECT_FALSE(item->isArray());
EXPECT_FALSE(item->isRange());
EXPECT_FALSE(item->hasNull());
EXPECT_EQ(1U, item->usages().size());
EXPECT_EQ(0x00090001U, item->usages()[0]);
EXPECT_FALSE(item->hasUsageMinimum());
EXPECT_FALSE(item->hasUsageMaximum());
EXPECT_FALSE(item->hasStrings());
EXPECT_EQ(8U, item->reportSize());
EXPECT_EQ(1U, item->reportCount());
EXPECT_EQ(0, item->unitExponent());
EXPECT_EQ("none", item->unitSystem());
EXPECT_EQ(0, item->unitFactorLengthExponent());
EXPECT_EQ(0, item->unitFactorMassExponent());
EXPECT_EQ(0, item->unitFactorTimeExponent());
EXPECT_EQ(0, item->unitFactorTemperatureExponent());
EXPECT_EQ(0, item->unitFactorCurrentExponent());
EXPECT_EQ(0, item->unitFactorLuminousIntensityExponent());
EXPECT_EQ(0, item->logicalMinimum());
EXPECT_EQ(1, item->logicalMaximum());
EXPECT_EQ(0, item->physicalMinimum());
EXPECT_EQ(1, item->physicalMaximum());
}
TEST(HIDDeviceTest, multiUsageItem) {
device::mojom::blink::HidReportItemPtr mojo_item = MakeReportItem();
// Configure the item to use 8 non-consecutive usages.
mojo_item->usages.clear();
for (int i = 1; i < 9; ++i) {
mojo_item->usages.push_back(device::mojom::blink::HidUsageAndPage::New(
2 * i, device::mojom::blink::kPageButton));
}
mojo_item->report_size = 1; // 1 bit.
mojo_item->report_count = 8;
HIDReportItem* item = HIDDevice::ToHIDReportItem(*mojo_item);
EXPECT_EQ(8U, item->usages().size());
EXPECT_EQ(0x00090002U, item->usages()[0]);
EXPECT_EQ(0x00090004U, item->usages()[1]);
EXPECT_EQ(0x00090006U, item->usages()[2]);
EXPECT_EQ(0x00090008U, item->usages()[3]);
EXPECT_EQ(0x0009000aU, item->usages()[4]);
EXPECT_EQ(0x0009000cU, item->usages()[5]);
EXPECT_EQ(0x0009000eU, item->usages()[6]);
EXPECT_EQ(0x00090010U, item->usages()[7]);
EXPECT_EQ(1U, item->reportSize());
EXPECT_EQ(8U, item->reportCount());
}
TEST(HIDDeviceTest, usageRangeItem) {
device::mojom::blink::HidReportItemPtr mojo_item = MakeReportItem();
// Configure the item to use a usage range. The item defines eight fields,
// each 1-bit wide, with consecutive usages from the Button usage page.
mojo_item->is_range = true;
mojo_item->usages.clear();
mojo_item->usage_minimum->usage_page = device::mojom::blink::kPageButton;
mojo_item->usage_minimum->usage = 0x01; // 1st button usage (primary).
mojo_item->usage_maximum->usage_page = device::mojom::blink::kPageButton;
mojo_item->usage_maximum->usage = 0x08; // 8th button usage.
mojo_item->report_size = 1; // 1 bit.
mojo_item->report_count = 8;
HIDReportItem* item = HIDDevice::ToHIDReportItem(*mojo_item);
EXPECT_FALSE(item->hasStrings());
EXPECT_FALSE(item->hasUsages());
EXPECT_EQ(0x00090001U, item->usageMinimum());
EXPECT_EQ(0x00090008U, item->usageMaximum());
EXPECT_EQ(1U, item->reportSize());
EXPECT_EQ(8U, item->reportCount());
}
TEST(HIDDeviceTest, unitDefinition) {
device::mojom::blink::HidReportItemPtr mojo_item = MakeReportItem();
// Add a unit definition and check that the unit properties are correctly
// converted.
mojo_item->unit_exponent = 0x0C; // 10^-4
mojo_item->unit = 0x0000E111; // g*cm/s^2
HIDReportItem* item = HIDDevice::ToHIDReportItem(*mojo_item);
EXPECT_EQ("si-linear", item->unitSystem());
EXPECT_EQ(-4, item->unitExponent());
EXPECT_EQ(1, item->unitFactorLengthExponent());
EXPECT_EQ(1, item->unitFactorMassExponent());
EXPECT_EQ(-2, item->unitFactorTimeExponent());
EXPECT_EQ(0, item->unitFactorTemperatureExponent());
EXPECT_EQ(0, item->unitFactorCurrentExponent());
EXPECT_EQ(0, item->unitFactorLuminousIntensityExponent());
}
} // namespace blink
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