text: add wholeText getter

Signed-off-by: Francis Bouvier <francis.bouvier@gmail.com>

src/run_tests.zig

@@ -9,6 +9,7 @@ const DOM = @import("dom.zig");
 const docTestExecFn = @import("html/document.zig").testExecFn;
 const nodeTestExecFn = @import("dom/node.zig").testExecFn;
 const characterDataTestExecFn = @import("dom/character_data.zig").testExecFn;
+const textTestExecFn = @import("dom/text.zig").testExecFn;
 
 var doc: *parser.DocumentHTML = undefined;
 
@@ -43,6 +44,7 @@ fn testsAllExecFn(
         docTestExecFn,
         nodeTestExecFn,
         characterDataTestExecFn,
+        textTestExecFn,
     };
 
     inline for (testFns) |testFn| {