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diff --git a/tests/test/sxml-namespaced.scm b/tests/test/sxml-namespaced.scm
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+(define-module (test sxml-namespaced)
+  :use-module (srfi srfi-64)
+  :use-module (srfi srfi-64 test-error)
+  :use-module (srfi srfi-88)
+  :use-module (ice-9 match)
+  :use-module (sxml namespaced)
+  :use-module (hnh util state-monad)
+  )
+
+;;; TODO tests with attributes
+
+(define (ns x)
+  (string->symbol (format #f "http://example.com/~a" x)))
+
+(define (namespaced-symbol ns symb)
+  (string->symbol (format #f "~a:~a" ns symb)))
+
+
+
+(test-group "XML constructor utility procedure"
+  (test-equal "3 args"
+    (make-xml-element 'tagname 'namespace 'attributes)
+    (xml 'namespace 'tagname 'attributes))
+
+  (test-equal "2 args"
+    (make-xml-element 'tagname 'namespace '())
+    (xml 'namespace 'tagname))
+
+  (test-equal "1 args"
+    (make-xml-element 'tagname #f '())
+    (xml 'tagname)))
+
+
+
+(test-group "xml->namespaced-sxml"
+
+  (test-equal
+      `(*TOP* (,(xml 'tag)))
+    (xml->namespaced-sxml "<tag/>"))
+
+  (test-equal
+      `(*TOP* (,(xml 'ns1 'tag)))
+    (xml->namespaced-sxml "<tag xmlns='ns1'/>"))
+
+  (test-equal
+      `(*TOP* (,(xml 'ns2 'tag)))
+    (xml->namespaced-sxml "<x:tag xmlns='ns1' xmlns:x='ns2'/>"))
+
+  (test-equal
+      `(*TOP* (,(xml 'ns2 'tag)
+               (,(xml 'ns1 'tag))))
+    (xml->namespaced-sxml "<x:tag xmlns='ns1' xmlns:x='ns2'><tag/></x:tag>"))
+
+  (test-equal "PI are passed directly"
+      `(*TOP* ,(make-pi-element 'xml "encoding=\"utf-8\" version=\"1.0\"")
+              (,(xml 'tag)))
+      (xml->namespaced-sxml "<?xml encoding=\"utf-8\" version=\"1.0\"?><tag/>"))
+
+  (test-equal "Document with whitespace in it"
+    `(*TOP* ,(make-pi-element 'xml "")
+            (,(xml 'root)
+             " "
+             (,(xml 'a))
+             ))
+    (xml->namespaced-sxml "<?xml?><root> <a/></root>"
+                          trim-whitespace?: #f))
+
+  ;; TODO is this expected? xml->sxml discards it.
+  (test-equal "Whitespace before root is kept"
+    `(*TOP* ,(make-pi-element 'xml "")
+            (,(xml 'root)))
+    (xml->namespaced-sxml "<?xml?> <root/>")))
+
+
+
+;;; NOTE that sxml->namespaced-sxml currently ignores any existing xmlns
+;;; attributes, since xml->sxml doesn't have those.
+(test-group "sxml->namespaced-sxml"
+  (test-equal "Simplest"
+    `(,(xml 'a)) (sxml->namespaced-sxml '(a) '()))
+  (test-equal "With *TOP*"
+    `(*TOP* (,(xml 'a))) (sxml->namespaced-sxml '(*TOP* (a)) '()))
+  (test-equal "Simplest with namespace"
+    `(,(xml (ns 1) 'a))
+    (sxml->namespaced-sxml '(x:a)
+                           `((x . ,(ns 1)))))
+  (test-equal "With pi"
+    `(*TOP* ,(make-pi-element 'xml "test")
+            (,(xml 'a)))
+    (sxml->namespaced-sxml
+     `(*TOP*
+       (*PI* xml "test")
+       (a))
+     '()))
+  (test-error "With unknown namespace"
+    'missing-namespace
+    (sxml->namespaced-sxml '(x:a) '())))
+
+
+
+(test-group "namespaced-sxml->*"
+
+  ;; /namespaces is the most "primitive" one
+  (test-group "/namespaces"
+   (test-group "Without namespaces"
+       (call-with-values
+           (lambda ()
+             (namespaced-sxml->sxml/namespaces
+              `(*TOP*
+                (,(xml 'a)))))
+         (lambda (tree namespaces)
+           (test-equal `(*TOP* (a)) tree)
+           (test-equal '() namespaces))))
+
+   (test-group "With namespaces"
+     (call-with-values
+         (lambda ()
+           (namespaced-sxml->sxml/namespaces
+            `(*TOP*
+              (,(xml (ns 1) 'a)
+               (,(xml (ns 2) 'a))
+               (,(xml 'a))))))
+       (lambda (tree nss)
+         (test-eqv 2 (length nss))
+         (test-equal
+             `(*TOP*
+               (,(namespaced-symbol (assoc-ref nss (ns 1)) 'a)
+                (,(namespaced-symbol (assoc-ref nss (ns 2)) 'a))
+                (a)))
+           tree))))
+
+   (test-group "*PI*"
+     (call-with-values
+         (lambda ()
+           (namespaced-sxml->sxml/namespaces
+            `(*TOP*
+              ,(make-pi-element 'xml "test")
+              (,(xml 'a)))))
+       (lambda (tree namespaces)
+         (test-equal '() namespaces)
+         (test-equal `(*TOP* (*PI* xml "test")
+                             (a))
+           tree)))))
+
+  (test-group "namespaced-sxml->sxml"
+    (test-equal "Without namespaces"
+      '(*TOP* (a (@)))
+      (namespaced-sxml->sxml `(*TOP* (,(xml 'a)))))
+
+    (test-group "With namespaces"
+     (match (namespaced-sxml->sxml `(*TOP* (,(xml (ns 1) 'a))))
+       ;; (ns 1) hard coded to work with match
+       (`(*TOP* (,el (@ (,key "http://example.com/1"))))
+        (let ((el-pair  (string-split (symbol->string el) #\:))
+              (key-pair (string-split (symbol->string key) #\:)))
+          (test-equal "a" (cadr el-pair))
+          (test-equal "xmlns" (car key-pair))
+          (test-equal (car el-pair) (cadr key-pair))))
+       (any
+        (test-assert (format #f "Match failed: ~s" any) #f))))))
+
+;; (namespaced-sxml->xml)
+;; Literal strings
+
+
+(test-error "Namespaces x is missing, note error"
+  'parser-error
+  (xml->namespaced-sxml "<x:a xmlns:y=\"http://example.com/1\"><x:b/></x:a>"
+                        ; `((x . ,(ns 1)))
+                        ))