Add sym_defer_pr debouncer type (#14948)

3 files changed, 229 insertions, 0 deletions

diff --git a/quantum/debounce/tests/rules.mk b/quantum/debounce/tests/rules.mk
index e908dd6f67..8318b1c668 100644
--- a/quantum/debounce/tests/rules.mk
+++ b/quantum/debounce/tests/rules.mk
@@ -28,6 +28,11 @@ debounce_sym_defer_pk_SRC := $(DEBOUNCE_COMMON_SRC) \
 	$(QUANTUM_PATH)/debounce/sym_defer_pk.c \
 	$(QUANTUM_PATH)/debounce/tests/sym_defer_pk_tests.cpp
 
+debounce_sym_defer_pr_DEFS := $(DEBOUNCE_COMMON_DEFS)
+debounce_sym_defer_pr_SRC := $(DEBOUNCE_COMMON_SRC) \
+	$(QUANTUM_PATH)/debounce/sym_defer_pr.c \
+	$(QUANTUM_PATH)/debounce/tests/sym_defer_pr_tests.cpp
+
 debounce_sym_eager_pk_DEFS := $(DEBOUNCE_COMMON_DEFS)
 debounce_sym_eager_pk_SRC := $(DEBOUNCE_COMMON_SRC) \
 	$(QUANTUM_PATH)/debounce/sym_eager_pk.c \
diff --git a/quantum/debounce/tests/sym_defer_pr_tests.cpp b/quantum/debounce/tests/sym_defer_pr_tests.cpp
new file mode 100644
index 0000000000..bb3333cf7b
--- /dev/null
+++ b/quantum/debounce/tests/sym_defer_pr_tests.cpp
@@ -0,0 +1,223 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtest/gtest.h"
+
+#include "debounce_test_common.h"
+
+TEST_F(DebounceTest, OneKeyShort1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 0ms delay (fast scan rate) */
+        {5, {{0, 1, UP}}, {}},
+
+        {10, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 1ms delay */
+        {6, {{0, 1, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyShort3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        /* 2ms delay */
+        {7, {{0, 1, UP}}, {}},
+
+        {12, {}, {{0, 1, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        /* Release key exactly on the debounce time */
+        {5, {{0, 1, UP}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyTooQuick2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+
+        /* Press key exactly on the debounce time */
+        {11, {{0, 1, DOWN}}, {}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 1, UP}}, {}},
+        {2, {{0, 1, DOWN}}, {}},
+        {3, {{0, 1, UP}}, {}},
+        {4, {{0, 1, DOWN}}, {}},
+        {5, {{0, 1, UP}}, {}},
+        {6, {{0, 1, DOWN}}, {}},
+        {11, {}, {{0, 1, DOWN}}}, /* 5ms after DOWN at time 7 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyBouncing2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {5, {}, {{0, 1, DOWN}}},
+        {6, {{0, 1, UP}}, {}},
+        {7, {{0, 1, DOWN}}, {}},
+        {8, {{0, 1, UP}}, {}},
+        {9, {{0, 1, DOWN}}, {}},
+        {10, {{0, 1, UP}}, {}},
+        {15, {}, {{0, 1, UP}}}, /* 5ms after UP at time 10 */
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyLong) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}}},
+
+        {25, {{0, 1, UP}}, {}},
+
+        {30, {}, {{0, 1, UP}}},
+
+        {50, {{0, 1, DOWN}}, {}},
+
+        {55, {}, {{0, 1, DOWN}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysShort) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {6, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+
+        {7, {{0, 1, UP}}, {}},
+        {8, {{0, 2, UP}}, {}},
+
+        {13, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}, {0, 2, DOWN}}, {}},
+
+        {5, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {6, {{0, 1, UP}, {0, 2, UP}}, {}},
+
+        {11, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, TwoKeysSimultaneous2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+        {1, {{0, 2, DOWN}}, {}},
+
+        {6, {}, {{0, 1, DOWN}, {0, 2, DOWN}}},
+        {7, {{0, 2, UP}}, {}},
+        {9, {{0, 1, UP}}, {}},
+
+        // Debouncing loses the specific ordering -- both events report simultaneously.
+        {14, {}, {{0, 1, UP}, {0, 2, UP}}},
+    });
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan1) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Immediately release key */
+        {300, {{0, 1, UP}}, {}},
+
+        {305, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan2) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is very late */
+        {300, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {301, {{0, 1, UP}}, {}},
+
+        {306, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan3) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Release key before debounce expires */
+        {300, {{0, 1, UP}}, {}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
+
+TEST_F(DebounceTest, OneKeyDelayedScan4) {
+    addEvents({ /* Time, Inputs, Outputs */
+        {0, {{0, 1, DOWN}}, {}},
+
+        /* Processing is a bit late */
+        {50, {}, {{0, 1, DOWN}}},
+        /* Release key after 1ms */
+        {51, {{0, 1, UP}}, {}},
+
+        {56, {}, {{0, 1, UP}}},
+    });
+    time_jumps_ = true;
+    runEvents();
+}
diff --git a/quantum/debounce/tests/testlist.mk b/quantum/debounce/tests/testlist.mk
index c54c45aa63..f7bd520698 100644
--- a/quantum/debounce/tests/testlist.mk
+++ b/quantum/debounce/tests/testlist.mk
@@ -1,6 +1,7 @@
 TEST_LIST += \
 	debounce_sym_defer_g \
 	debounce_sym_defer_pk \
+	debounce_sym_defer_pr \
 	debounce_sym_eager_pk \
 	debounce_sym_eager_pr \
 	debounce_asym_eager_defer_pk