make print-table org-mode compatible

The tests all specify the key order explicitly, since I didn't want to
risk the key/column order changing across Clojure versions if they
were determined by calling keys on the first map.

Signed-off-by: Stuart Halloway <stu@thinkrelevance.com>

Author: stuarthalloway

src/clj/clojure/pprint/print_table.clj

@@ -20,17 +20,17 @@
                      (fn [k]
                        (apply max (count (str k)) (map #(count (str (get % k))) rows)))
                      ks)
-             fmts (map #(str "%-" % "s") widths)
-             fmt-row (fn [row]
-                       (apply str (interpose " | "
-                                             (for [[col fmt] (map vector (map #(get row %) ks) fmts)]
-                                               (format fmt (str col))))))
-             header (fmt-row (zipmap ks ks))
-             bar (apply str (repeat (count header) "="))]
-         (println bar)
-         (println header)
-         (println bar)
+             spacers (map #(apply str (repeat % "-")) widths)
+             fmts (map #(str "%" % "s") widths)
+             fmt-row (fn [leader divider trailer row]
+                       (str leader
+                            (apply str (interpose divider
+                                                  (for [[col fmt] (map vector (map #(get row %) ks) fmts)]
+                                                    (format fmt (str col)))))
+                            trailer))]
+         (println)
+         (println (fmt-row "| " " | " " |" (zipmap ks ks)))
+         (println (fmt-row "|-" "-+-" "-|" (zipmap ks spacers)))
          (doseq [row rows]
-           (println (fmt-row row)))
-         (println bar))))
+           (println (fmt-row "| " " | " " |" row))))))
   ([rows] (print-table (keys (first rows)) rows)))

test/clojure/test_clojure/pprint/test_cl_format.clj

@@ -759,3 +759,25 @@ but it was called with an argument of type short-float.\n")
           '((hot dog) (hamburger) (ice cream) (french fries))) 
   "/hot .../hamburger")
 
+(simple-tests pprint-table-tests
+  (with-out-str
+    (print-table [:b :a]
+                 [{:a 1 :b {:a 'is-a} :c ["hi" "there"]}
+                  {:b 5 :a 7 :c "dog" :d -700}]))
+  "
+|        :b | :a |
+|-----------+----|
+| {:a is-a} |  1 |
+|         5 |  7 |
+"
+  (with-out-str
+    (print-table [:a :e :d :c]
+                 [{:a 54.7e17 :b {:a 'is-a} :c ["hi" "there"]}
+                  {:b 5 :a -2/3 :c "dog" :d 'panda}]))
+  "
+|      :a | :e |    :d |             :c |
+|---------+----+-------+----------------|
+| 5.47E18 |    |       | [\"hi\" \"there\"] |
+|    -2/3 |    | panda |            dog |
+"
+  )