ship schemas in the test snap; add the home interface

tests/lib/snaps/test-snapd-gsettings-consumer/Makefile

@@ -1,8 +1,9 @@
 # -*- Mode: Makefile; indent-tabs-mode:t; tab-width: 4 -*-
 
 all:
-
 install:
 	mkdir -p $(DESTDIR)/bin
 	cp -a bin/get $(DESTDIR)/bin/get
 	cp -a bin/set $(DESTDIR)/bin/set
+	cp -a $(SNAPCRAFT_STAGE)/usr/share/glib-2.0 $(DESTDIR)/usr/share/glib-2.0
+	glib-compile-schemas $(DESTDIR)/usr/share/glib-2.0/schemas

tests/lib/snaps/test-snapd-gsettings-consumer/bin/get

@@ -3,4 +3,10 @@
 schema="$1"
 key="$2"
 
-gsettings get "$schema" "$key"
+export XDG_DATA_HOME=$SNAP/usr/share
+# Font Config
+export FONTCONFIG_PATH=$SNAP/etc/fonts/config.d
+export FONTCONFIG_FILE=$SNAP/etc/fonts/fonts.conf
+export HOME=$SNAP_USER_DATA
+
+desktop-launch gsettings get "$schema" "$key"

tests/lib/snaps/test-snapd-gsettings-consumer/bin/set

@@ -4,4 +4,10 @@ schema="$1"
 key="$2"
 value="$3"
 
-gsettings set "$schema" "$key" "$value"
+export XDG_DATA_HOME=$SNAP/usr/share
+# Font Config
+export FONTCONFIG_PATH=$SNAP/etc/fonts/config.d
+export FONTCONFIG_FILE=$SNAP/etc/fonts/fonts.conf
+export HOME=$SNAP_USER_DATA
+
+desktop-launch gsettings set "$schema" "$key" "$value"

tests/lib/snaps/test-snapd-gsettings-consumer/snapcraft.yaml

@@ -6,13 +6,17 @@ description: A basic snap declaring a plug on gsettings
 apps:
     get:
         command: bin/get
-        plugs: [gsettings]
+        plugs: [gsettings, home]
     set:
         command: bin/set
-        plugs: [gsettings]
+        plugs: [gsettings, home]
 
 parts:
     gsettings:
         plugin: make
         source: .
-        stage-packages: [libglib2.0-bin]
+        after: [desktop/glib-only]
+        stage-packages: [libglib2.0-bin, gsettings-ubuntu-schemas, usermetricsservice]
+        snap:
+            - bin/*
+            - usr/share/glib-2.0/*