4 files changed, 73 insertions, 10 deletions
diff --git a/src/libserver/css/css.cxx b/src/libserver/css/css.cxx
index 49bab734d..4587085a8 100644
--- a/src/libserver/css/css.cxx
+++ b/src/libserver/css/css.cxx
@@ -28,6 +28,8 @@ rspamd_css_parse_style (rspamd_mempool_t *pool, const guchar *begin, gsize len,
 {
 	auto parse_res = rspamd::css::parse_css(pool, {(const char* )begin, len});
 
+#if 0
+	/* Return once semantical parsing is done */
 	if (parse_res.has_value()) {
 		return reinterpret_cast<rspamd_css>(parse_res.value().release());
 	}
@@ -37,6 +39,9 @@ rspamd_css_parse_style (rspamd_mempool_t *pool, const guchar *begin, gsize len,
 				"parse error");
 		return nullptr;
 	}
+#else
+	return nullptr;
+#endif
 }
 
 namespace rspamd::css {
diff --git a/src/libserver/css/css_parser.cxx b/src/libserver/css/css_parser.cxx
index e6213d30d..019849122 100644
--- a/src/libserver/css/css_parser.cxx
+++ b/src/libserver/css/css_parser.cxx
@@ -19,9 +19,12 @@
 #include "css_selector.hxx"
 #include "css_rule.hxx"
 #include "fmt/core.h"
+
 #include <vector>
 #include <unicode/utf8.h>
 
+#define DOCTEST_CONFIG_IMPLEMENTATION_IN_DLL
+#include "doctest/doctest.h"
 
 namespace rspamd::css {
 
@@ -117,9 +120,9 @@ auto css_consumed_block::debug_str(void) -> std::string {
 					ret += R"("empty")";
 				}
 				else if constexpr (std::is_same_v<T, css_function_block>) {
-					/* Empty block */
-					ret += fmt::format(R"({ "content": {"token": "{}", "arguments":  [)",
-							arg.function.debug_token_str());
+					ret += R"({ "content": {"token": )";
+					ret += "\"" + arg.function.debug_token_str() + "\", ";
+					ret += R"("arguments":  [)";
 
 					for (const auto &block : arg.args) {
 						ret += "{";
@@ -619,13 +622,59 @@ bool css_parser::consume_input(const std::string_view &sv)
  * Wrapper for the parser
  */
 auto parse_css(rspamd_mempool_t *pool, const std::string_view &st) ->
-	tl::expected<std::unique_ptr<css_style_sheet>,css_parse_error>
+	bool
 {
 	css_parser parser(pool);
 
-	parser.consume_input(st);
+	if (parser.consume_input(st)) {
+		return true;
+	}
+
+	return false;
+}
 
-	return parser.get_object_maybe();
+TEST_SUITE("css parser") {
+	TEST_CASE("parse colors") {
+		const std::vector<const char *> cases{
+			"p { color: rgb(100%, 50%, 0%); opacity: -1; width: 1em; display: none; } /* very transparent solid orange */",
+			"p { color: rgb(100%, 50%, 0%); opacity: 2; display: inline; } /* very transparent solid orange */",
+			"p { color: rgb(100%, 50%, 0%); opacity: 0.5; } /* very transparent solid orange */\n",
+			"p { color: rgb(100%, 50%, 0%); opacity: 1; width: 99%; } /* very transparent solid orange */\n",
+			"p { color: rgb(100%, 50%, 0%); opacity: 10%; width: 99%; } /* very transparent solid orange */\n",
+			"p { color: rgb(100%, 50%, 0%); opacity: 10%; width: 100px; } /* very transparent solid orange */\n",
+			"p { color: rgb(100%, 50%, 0%); opacity: 10% } /* very transparent solid orange */\n",
+			"* { color: hsl(0, 100%, 50%) !important }   /* red */\n",
+			"* { color: hsl(120, 100%, 50%) important } /* lime */\n",
+			"* { color: hsl(120, 100%, 25%) } /* dark green */\n",
+			"* { color: hsl(120, 100%, 75%) } /* light green */\n",
+			"* { color: hsl(120, 75%, 75%) }  /* pastel green, and so on */\n",
+			"em { color: #f00 }              /* #rgb */\n",
+			"em { color: #ff0000 }           /* #rrggbb */\n",
+			"em { color: rgb(255,0,0) }\n",
+			"em { color: rgb(100%, 0%, 0%) }\n",
+			"body {color: black; background: white }\n",
+			"h1 { color: maroon }\n",
+			"h2 { color: olive }\n",
+			"em { color: rgb(255,0,0) }       /* integer range 0 - 255 */\n",
+			"em { color: rgb(300,0,0) }       /* clipped to rgb(255,0,0) */\n",
+			"em { color: rgb(255,-10,0) }     /* clipped to rgb(255,0,0) */\n",
+			"em { color: rgb(110%, 0%, 0%) }  /* clipped to rgb(100%,0%,0%) */\n",
+			"em { color: rgb(255,0,0) }      /* integer range 0 - 255 */\n",
+			"em { color: rgba(255,0,0,1)     /* the same, with explicit opacity of 1 */\n",
+			"em { color: rgb(100%,0%,0%) }   /* float range 0.0% - 100.0% */\n",
+			"em { color: rgba(100%,0%,0%,1) } /* the same, with explicit opacity of 1 */\n",
+			"p { color: rgba(0,0,255,0.5) }        /* semi-transparent solid blue */\n",
+			"p { color: rgba(100%, 50%, 0%, 0.1) } /* very transparent solid orange */",
+		};
+
+		rspamd_mempool_t *pool = rspamd_mempool_new(rspamd_mempool_suggest_size(),
+				"css", 0);
+		for (const auto &c : cases) {
+			CHECK_UNARY(parse_css(pool, c));
+		}
+
+		rspamd_mempool_delete(pool);
+	}
 }
 
 }
diff --git a/src/libserver/css/css_parser.hxx b/src/libserver/css/css_parser.hxx
index d0c378b0f..034c135c6 100644
--- a/src/libserver/css/css_parser.hxx
+++ b/src/libserver/css/css_parser.hxx
@@ -186,7 +186,7 @@ extern const css_consumed_block css_parser_eof_block;
 using blocks_gen_functor = std::function<const css_consumed_block &(void)>;
 
 auto parse_css (rspamd_mempool_t *pool, const std::string_view &st) ->
-		tl::expected<std::unique_ptr<css_style_sheet>,css_parse_error>;
+		bool;
 
 }
 
diff --git a/src/libserver/css/css_value.cxx b/src/libserver/css/css_value.cxx
index 5e482b58f..9f1f4dd7f 100644
--- a/src/libserver/css/css_value.cxx
+++ b/src/libserver/css/css_value.cxx
@@ -386,10 +386,19 @@ TEST_SUITE("css values") {
 		}
 	}
 	TEST_CASE("css colors strings") {
+		auto passed = 0;
 		for (const auto &p : css_colors_map) {
-			auto col_parsed = css_value::maybe_color_from_string(p.first);
-			auto final_col = col_parsed.value().to_color().value();
-			CHECK(final_col == p.second);
+			/* Match some of the colors selected randomly */
+			if (rspamd_random_double_fast() > 0.9) {
+				auto col_parsed = css_value::maybe_color_from_string(p.first);
+				auto final_col = col_parsed.value().to_color().value();
+				CHECK_MESSAGE(final_col == p.second, p.first.data());
+				passed ++;
+
+				if (passed > 20) {
+					break;
+				}
+			}
 		}
 	}
 };