Add test cases for MFD clock display

tests/Makefile.am

@@ -6,7 +6,8 @@ AM_SH_LOG_FLAGS =
 TESTS = \
 	libx52/test_leds.sh \
 	libx52/test_brightness.sh \
-	libx52/test_indicator.sh
+	libx52/test_indicator.sh \
+	libx52/test_clock.sh
 
 EXTRA_DIST = common_infra.sh $(TESTS)
 

tests/common_infra.sh

@@ -58,6 +58,12 @@ X52_SHIFT_INDICATOR_INDEX='00fd'
 X52_INDICATOR_STATE_ON='0051'
 X52_INDICATOR_STATE_OFF='0050'
 
+X52_CLOCK_1_INDEX='00c0'
+X52_CLOCK_2_INDEX='00c1'
+X52_CLOCK_3_INDEX='00c2'
+X52_CLOCK_DATE_INDEX='00c4'
+X52_CLOCK_YEAR_INDEX='00c8'
+
 find_programs()
 {
     # Tests and distcheck do not work on OSX, skip the tests

tests/libx52/test_clock.sh

@@ -0,0 +1,119 @@
+#!/bin/bash
+
+source $(dirname $0)/../common_infra.sh
+
+TEST_SUITE_ID="libx52 clock tests"
+
+clock_test_utc()
+{
+    local timezone=$1
+    local time_format=$2
+    local date_format=$3
+    TEST_ID="Test setting clock to $timezone time, $time_format, $date_format"
+
+    local dd=$(date +%_d)
+    local mm=$(date +%_m)
+    local yy=$(date +%_y)
+    local hr=$(date +%_H)
+    local mn=$(date +%_M)
+
+    local clock_value=$(($hr * 256 + $mn))
+    if [[ $time_format == 24hr ]]
+    then
+        clock_value=$(($clock_value + 32768))
+    fi
+
+    case $date_format in
+    ddmmyy)
+        date_value=$(($mm * 256 + $dd))
+        year_value=$yy
+        ;;
+    mmddyy)
+        date_value=$(($dd * 256 + $mm))
+        year_value=$yy
+        ;;
+    yymmdd)
+        date_value=$(($mm * 256 + $yy))
+        year_value=$dd
+        ;;
+    *)
+        ;;
+    esac
+
+    expect_pattern \
+        $X52_CLOCK_DATE_INDEX $(printf '%04x' $date_value) \
+        $X52_CLOCK_YEAR_INDEX $(printf '%04x' $year_value) \
+        $X52_CLOCK_1_INDEX $(printf '%04x' $clock_value) \
+
+    $X52CLI clock $timezone $time_format $date_format
+
+    verify_output
+}
+
+offset_test()
+{
+    local clock_id=$1
+    local offset=$2
+    local time_format=$3
+    TEST_ID="Test setting clock $clock_id offset to $offset, $time_format"
+
+    local index="\$X52_CLOCK_${clock_id}_INDEX"
+    local value=0
+
+    # Handle negative case
+    if [[ $offset -lt 0 ]]
+    then
+        value=$((-$offset))
+        value=$(($value & 0x3ff))
+        value=$(($value | 1024))
+    else
+        value=$offset
+    fi
+
+    if [[ $time_format == 24hr ]]
+    then
+        value=$(($value + 32768))
+    fi
+
+    expect_pattern $(eval echo $index) $(printf '%04x' $value)
+
+    $X52CLI offset $clock_id $offset $time_format
+
+    verify_output
+
+}
+
+# For all test cases, we want to assume that the local timezone
+# is the same as UTC, as otherwise, it can cause havoc, depending
+# on when and where the tests are run.
+export TZ=UTC
+
+for timezone in 'local' gmt
+do
+    for time_format in 12hr 24hr
+    do
+        for date_format in ddmmyy mmddyy yymmdd
+        do
+            clock_test_utc $timezone $time_format $date_format
+        done
+    done
+done
+
+# For the offset test cases, x52cli reinitializes the internal data
+# structure every time it is called, therefore, the timezone for clock
+# 1 is automatically reset to UTC.
+unset TZ
+
+for clock in 2 3
+do
+    for time_format in 12hr 24hr
+    do
+        # Run offset tests for every 30 minute offset from UTC
+        for offset in $(seq -1020 30 1020)
+        do
+            offset_test $clock $offset $time_format
+        done
+    done
+done
+verify_test_suite
+