Squashed 'third_party/allwpilib_2019/' content from commit bd05dfa1c
Change-Id: I2b1c2250cdb9b055133780c33593292098c375b7
git-subtree-dir: third_party/allwpilib_2019
git-subtree-split: bd05dfa1c7cca74c4fac451e7b9d6a37e7b53447
diff --git a/wpilibcIntegrationTests/src/main/native/cpp/FakeEncoderTest.cpp b/wpilibcIntegrationTests/src/main/native/cpp/FakeEncoderTest.cpp
new file mode 100644
index 0000000..bf5a8ee
--- /dev/null
+++ b/wpilibcIntegrationTests/src/main/native/cpp/FakeEncoderTest.cpp
@@ -0,0 +1,161 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2014-2018 FIRST. All Rights Reserved. */
+/* Open Source Software - may be modified and shared by FRC teams. The code */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project. */
+/*----------------------------------------------------------------------------*/
+
+#include "frc/Encoder.h" // NOLINT(build/include_order)
+
+#include "TestBench.h"
+#include "frc/AnalogOutput.h"
+#include "frc/AnalogTrigger.h"
+#include "frc/DigitalOutput.h"
+#include "frc/Timer.h"
+#include "gtest/gtest.h"
+
+using namespace frc;
+
+static const double kDelayTime = 0.001;
+
+class FakeEncoderTest : public testing::Test {
+ protected:
+ DigitalOutput* m_outputA;
+ DigitalOutput* m_outputB;
+ AnalogOutput* m_indexOutput;
+
+ Encoder* m_encoder;
+ AnalogTrigger* m_indexAnalogTrigger;
+ std::shared_ptr<AnalogTriggerOutput> m_indexAnalogTriggerOutput;
+
+ void SetUp() override {
+ m_outputA = new DigitalOutput(TestBench::kLoop2OutputChannel);
+ m_outputB = new DigitalOutput(TestBench::kLoop1OutputChannel);
+ m_indexOutput = new AnalogOutput(TestBench::kAnalogOutputChannel);
+ m_outputA->Set(false);
+ m_outputB->Set(false);
+ m_encoder = new Encoder(TestBench::kLoop1InputChannel,
+ TestBench::kLoop2InputChannel);
+ m_indexAnalogTrigger =
+ new AnalogTrigger(TestBench::kFakeAnalogOutputChannel);
+ m_indexAnalogTrigger->SetLimitsVoltage(2.0, 3.0);
+ m_indexAnalogTriggerOutput =
+ m_indexAnalogTrigger->CreateOutput(AnalogTriggerType::kState);
+ }
+
+ void TearDown() override {
+ delete m_outputA;
+ delete m_outputB;
+ delete m_indexOutput;
+ delete m_encoder;
+ delete m_indexAnalogTrigger;
+ }
+
+ /**
+ * Output pulses to the encoder's input channels to simulate a change of 100
+ * ticks
+ */
+ void Simulate100QuadratureTicks() {
+ for (int32_t i = 0; i < 100; i++) {
+ m_outputA->Set(true);
+ Wait(kDelayTime);
+ m_outputB->Set(true);
+ Wait(kDelayTime);
+ m_outputA->Set(false);
+ Wait(kDelayTime);
+ m_outputB->Set(false);
+ Wait(kDelayTime);
+ }
+ }
+
+ void SetIndexHigh() {
+ m_indexOutput->SetVoltage(5.0);
+ Wait(kDelayTime);
+ }
+
+ void SetIndexLow() {
+ m_indexOutput->SetVoltage(0.0);
+ Wait(kDelayTime);
+ }
+};
+
+/**
+ * Test the encoder by reseting it to 0 and reading the value.
+ */
+TEST_F(FakeEncoderTest, TestDefaultState) {
+ EXPECT_FLOAT_EQ(0.0, m_encoder->Get()) << "The encoder did not start at 0.";
+}
+
+/**
+ * Test the encoder by setting the digital outputs and reading the value.
+ */
+TEST_F(FakeEncoderTest, TestCountUp) {
+ m_encoder->Reset();
+ Simulate100QuadratureTicks();
+
+ EXPECT_FLOAT_EQ(100.0, m_encoder->Get()) << "Encoder did not count to 100.";
+}
+
+/**
+ * Test that the encoder can stay reset while the index source is high
+ */
+TEST_F(FakeEncoderTest, TestResetWhileHigh) {
+ m_encoder->SetIndexSource(*m_indexAnalogTriggerOutput,
+ Encoder::IndexingType::kResetWhileHigh);
+
+ SetIndexLow();
+ Simulate100QuadratureTicks();
+ SetIndexHigh();
+ EXPECT_EQ(0, m_encoder->Get());
+
+ Simulate100QuadratureTicks();
+ EXPECT_EQ(0, m_encoder->Get());
+}
+
+/**
+ * Test that the encoder can reset when the index source goes from low to high
+ */
+TEST_F(FakeEncoderTest, TestResetOnRisingEdge) {
+ m_encoder->SetIndexSource(*m_indexAnalogTriggerOutput,
+ Encoder::IndexingType::kResetOnRisingEdge);
+
+ SetIndexLow();
+ Simulate100QuadratureTicks();
+ SetIndexHigh();
+ EXPECT_EQ(0, m_encoder->Get());
+
+ Simulate100QuadratureTicks();
+ EXPECT_EQ(100, m_encoder->Get());
+}
+
+/**
+ * Test that the encoder can stay reset while the index source is low
+ */
+TEST_F(FakeEncoderTest, TestResetWhileLow) {
+ m_encoder->SetIndexSource(*m_indexAnalogTriggerOutput,
+ Encoder::IndexingType::kResetWhileLow);
+
+ SetIndexHigh();
+ Simulate100QuadratureTicks();
+ SetIndexLow();
+ EXPECT_EQ(0, m_encoder->Get());
+
+ Simulate100QuadratureTicks();
+ EXPECT_EQ(0, m_encoder->Get());
+}
+
+/**
+ * Test that the encoder can reset when the index source goes from high to low
+ */
+TEST_F(FakeEncoderTest, TestResetOnFallingEdge) {
+ m_encoder->SetIndexSource(*m_indexAnalogTriggerOutput,
+ Encoder::IndexingType::kResetOnFallingEdge);
+
+ SetIndexHigh();
+ Simulate100QuadratureTicks();
+ SetIndexLow();
+ EXPECT_EQ(0, m_encoder->Get());
+
+ Simulate100QuadratureTicks();
+ EXPECT_EQ(100, m_encoder->Get());
+}