Use a custom theme for CSS style tests

Use a custom, empty theme and stop importing reset-to-defaults.css.
This avoids overwriting initial values, so our initial value
filtering works better.

testsuite/css/style/Makefile.am

@@ -14,15 +14,19 @@ test_css_style_CFLAGS = \
         -I$(top_builddir)/gdk           \
         -I$(top_srcdir)/gdk             \
         $(GTK_DEBUG_FLAGS)              \
-        $(GTK_DEP_CFLAGS)
+        $(GTK_DEP_CFLAGS)		\
+	$(NULL)
 
 test_css_style_LDADD = \
         $(top_builddir)/gdk/libgdk-3.la \
         $(top_builddir)/gtk/libgtk-3.la \
-        $(GTK_DEP_LIBS)
+        $(GTK_DEP_LIBS)			\
+	$(NULL)
 
 test_css_style_SOURCES = \
-        test-css-style.c
+        test-css-style.c		\
+	resources.c			\
+	$(NULL)
 
 test_data = \
         currentcolor.ui currentcolor.css        currentcolor.nodes \
@@ -31,7 +35,19 @@ test_data = \
 	nth-child.ui	nth-child.css	        nth-child.nodes \
 	$(NULL)
 
-EXTRA_DIST += $(test_in_files) $(test_data)
+BUILT_SOURCES = resources.c
+
+resource_files = $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(srcdir) --generate-dependencies $(builddir)/test-css-style.gresource.xml)
+
+resources.c: test-css-style.gresource.xml $(resource_files)
+	$(AM_V_GEN) $(GLIB_COMPILE_RESOURCES) --target=$@ --sourcedir=$(srcdir) --generate-source $(srcdir)/test-css-style.gresource.xml
+
+EXTRA_DIST += \
+	test-css-style.gresource.xml	\
+	$(resource_files)		\
+	$(test_in_files) 		\
+	$(test_data)			\
+	$(NULL)
 
 if BUILDOPT_INSTALL_TESTS
 insttestdir=$(libexecdir)/installed-tests/$(PACKAGE)/css/style
@@ -48,7 +64,6 @@ $(test_files): %.test: %.test.in
 	$(AM_V_GEN) sed $(substitutions) $< > $@.tmp && mv $@.tmp $@
 
 EXTRA_DIST += \
-	reset-to-defaults.css 	\
 	$(test_files) 		\
 	$(NULL)
 

testsuite/css/style/currentcolor.css

@@ -1,5 +1,3 @@
-@import "reset-to-defaults.css";
-
 box {
   color: red;
 }

testsuite/css/style/inherit.css

@@ -1,5 +1,3 @@
-@import "reset-to-defaults.css";
-
 box {
   color: red;
   opacity: 0.5;

testsuite/css/style/label.css

@@ -1,5 +1,3 @@
-@import "reset-to-defaults.css";
-
 box {
   font: "Comic Sans";
 }

testsuite/css/style/nth-child.css

@@ -1,5 +1,3 @@
-@import "reset-to-defaults.css";
-
 label:first-child {
   font-size: 20px;
 }

testsuite/css/style/reset-to-defaults.css

@@ -1,3 +0,0 @@
-* {
-  all: unset;
-}

testsuite/css/style/test-css-style.c

@@ -245,6 +245,7 @@ main (int argc, char **argv)
 
   g_object_set (gtk_settings_get_default (),
                 "gtk-font-name", "Sans",
+                "gtk-theme-name", "Empty",
                 NULL);
   if (argc < 2)
     {

testsuite/css/style/test-css-style.gresource.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/org/gtk/libgtk/theme">
+    <file>Empty.css</file>
+  </gresource>
+</gresources>