metadata test updates

tests/metadata.test

@@ -1,5 +1,5 @@
-# we currently should parse and ignore ledger-style metadata attributes
+# 1. we currently parse metadata tags on transactions and postings, printing
-#
+# the former and ignoring the latter
 bin/hledger -f - print
 <<<
 2010/01/01
@@ -10,7 +10,7 @@ bin/hledger -f - print
   ; posting1data2: 
   b            -1
   ; posting2data1:
-; posting2nonmetadata:
+; non-metadata:
 >>>
 2010/01/01
     a             1
@@ -19,27 +19,57 @@ bin/hledger -f - print
 >>>2
 >>>=0
 
-bin/hledger -f - print tag key1=value
+# 2. print (and a few other commands) can filter by tag value
+bin/hledger -f - print tag foo=bar
 <<<
 2010/01/01
-  ; key:value
+  ; foo:bar
   a             1
   b            -1
->>>
->>>2
->>>=0
 
-bin/hledger -f - print tag key=value
+2010/01/02
-<<<
+  ; foo:baz
-2010/01/01
+  c             1
-  ; key:value
+  d            -1
-    a             1
+
-    b            -1
+2010/01/03
+    e             1
+    f            -1
 >>>
 2010/01/01
-  ; key:value
+  ; foo:bar
     a             1
     b            -1
 
 >>>2
 >>>=0
+
+# # 3. or tag existence ? not yet
+# bin/hledger -f - print tag foo
+# <<<
+# 2010/01/01
+#   ; foo:bar
+#   a             1
+#   b            -1
+
+# 2010/01/02
+#   ; foo:baz
+#   c             1
+#   d            -1
+
+# 2010/01/03
+#     e             1
+#     f            -1
+# >>>
+# 2010/01/01
+#   ; foo:bar
+#     a             1
+#     b            -1
+
+# 2010/01/02
+#   ; foo:baz
+#     c             1
+#     d            -1
+
+# >>>2
+# >>>=0