Include excluded tests in coverage report, use xorg-dummy-driver (#1193)

platform/linux/BUILD.bazel

@@ -30,3 +30,8 @@ cc_library(
         "//platform/default:mbgl-default",
     ],
 )
+
+sh_binary(
+    name = "startxwrapper",
+    srcs = ["xorg/startxwrapper"],
+)

platform/linux/xorg/README.md

@@ -0,0 +1,5 @@
+# Xorg dummy driver
+
+This directory contains an `xorg.conf` that uses the Xorg dummy driver.
+
+It can be used as an alternative to `xvfb-run`.

platform/linux/xorg/startxwrapper

@@ -0,0 +1,8 @@
+#!/usr/bin/bash
+
+script=$(realpath "$0")
+scriptpath=$(dirname "$script")
+
+exit_code=$(mktemp)
+XAUTHORITY=$(mktemp) startx "$PWD/$@ && echo $? > $exit_code" -- -xf86config "$scriptpath/xorg.conf" -logfile /dev/null
+exit $(cat $exit_code)

platform/linux/xorg/xorg.conf

@@ -0,0 +1,35 @@
+# This xorg.conf is used with the xserver-xorg-video-dummy driver in the workflows
+
+Section "Monitor"
+Identifier "Monitor0"
+HorizSync 28.0-80.0
+VertRefresh 48.0-75.0
+# 1024x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 64.11 MHz
+# Modeline "1024x768_60.00" 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync
+# 1280x720 @ 60.00 Hz (GTF) hsync: 44.76 kHz; pclk: 74.48 MHz
+# Modeline "1280x720_60.00" 74.48 1280 1336 1472 1664 720 721 724 746 -HSync +Vsync
+# 1368x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 85.86 MHz
+# Modeline "1368x768_60.00" 85.86 1368 1440 1584 1800 768 769 772 795 -HSync +Vsync
+# 1600x900 @ 60.00 Hz (GTF) hsync: 55.92 kHz; pclk: 119.00 MHz
+# Modeline "1600x900_60.00" 119.00 1600 1696 1864 2128 900 901 904 932 -HSync +Vsync
+# 1920x1080 @ 60.00 Hz (GTF) hsync: 67.08 kHz; pclk: 172.80 MHz
+Modeline "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
+EndSection
+
+Section "Device"
+Identifier "Card0"
+Option "NoDDC" "true"
+Option "IgnoreEDID" "true"
+Driver "dummy"
+EndSection
+
+Section "Screen"
+DefaultDepth 16
+Identifier "Screen0"
+Device "Card0"
+Monitor "Monitor0"
+    SubSectionSub "Display"
+    Depth 16
+    Modes "1920x1080"
+    EndSubSection
+EndSection