Removed several unnecessary imports.

24 files changed, 342 insertions, 288 deletions

diff --git a/stdlib/source/test/aedifex.lux b/stdlib/source/test/aedifex.lux
index 704faffbb..2f46df228 100644
--- a/stdlib/source/test/aedifex.lux
+++ b/stdlib/source/test/aedifex.lux
@@ -31,8 +31,7 @@
    ["#." pom]
    ["#." repository]
    ["#." runtime]
-   ["#." metadata #_
-    ["#/." artifact]]])
+   ["#." metadata]])
 
 (def: test
   Test
@@ -61,7 +60,7 @@
       /pom.test
       /repository.test
       /runtime.test
-      /metadata/artifact.test
+      /metadata.test
       ))
 
 (program: args
diff --git a/stdlib/source/test/aedifex/metadata.lux b/stdlib/source/test/aedifex/metadata.lux
new file mode 100644
index 000000000..5b8b47b00
--- /dev/null
+++ b/stdlib/source/test/aedifex/metadata.lux
@@ -0,0 +1,32 @@
+(.module:
+  [lux #*
+   ["_" test (#+ Test)]
+   [abstract
+    [monad (#+ do)]]
+   [data
+    ["." text]]
+   [math
+    ["." random]]]
+  ["." / #_
+   ["#." artifact]
+   [//
+    ["@." artifact]]]
+  {#program
+   ["." /]})
+
+(def: #export test
+  Test
+  (<| (_.covering /._)
+      ($_ _.and
+          (<| (_.for [/.file])
+              (do random.monad
+                [sample @artifact.random]
+                ($_ _.and
+                    (_.cover [/.for-project]
+                             (text.ends-with? /.file (/.for-project sample)))
+                    (_.cover [/.for-version]
+                             (text.ends-with? /.file (/.for-version sample)))
+                    )))
+
+          /artifact.test
+          )))
diff --git a/stdlib/source/test/aedifex/repository.lux b/stdlib/source/test/aedifex/repository.lux
index 4da17a059..ff669d687 100644
--- a/stdlib/source/test/aedifex/repository.lux
+++ b/stdlib/source/test/aedifex/repository.lux
@@ -2,14 +2,15 @@
   [lux #*
    ["_" test (#+ Test)]
    [abstract
-    ["." hash (#+ Hash)]
-    ["." equivalence (#+ Equivalence)]
+    [equivalence (#+ Equivalence)]
+    [hash (#+ Hash)]
     ["." monad (#+ do)]]
    [control
     ["." io]
     ["." try]
     ["." exception (#+ exception:)]]
    [data
+    ["." product]
     ["." binary (#+ Binary)]
     ["." text
      ["%" format (#+ format)]]
@@ -34,7 +35,7 @@
 
 (def: identity-equivalence
   (Equivalence Identity)
-  (equivalence.product text.equivalence
+  (product.equivalence text.equivalence
                        text.equivalence))
 
 (def: artifact
@@ -43,7 +44,7 @@
 
 (def: item-hash
   (Hash [Artifact Extension])
-  (hash.product //artifact.hash
+  (product.hash //artifact.hash
                 text.hash))
 
 (exception: (not-found {artifact Artifact}
diff --git a/stdlib/source/test/lux.lux b/stdlib/source/test/lux.lux
index 7e138d33b..7b85a6ff4 100644
--- a/stdlib/source/test/lux.lux
+++ b/stdlib/source/test/lux.lux
@@ -1,16 +1,17 @@
 (.module:
   ["/" lux #*
+   ["@" target]
    [abstract
     [monad (#+ do)]
     [predicate (#+ Predicate)]]
    [control
     ["." io (#+ io)]
-    [function
-     [mixin (#+)]]
     [parser
      [cli (#+ program:)]]]
    [data
     ["." name]
+    [text
+     ["%" format (#+ format)]]
     [number
      ["." i64]
      ["n" nat]
@@ -19,109 +20,8 @@
      ["f" frac]]]
    ["." math]
    ["_" test (#+ Test)]
-   ## These modules do not need to be tested.
-   [type
-    [variance (#+)]]
-   [locale (#+)
-    [language (#+)]
-    [territory (#+)]]
-   ["%" data/text/format (#+ format)]
    [math
-    ["." random (#+ Random) ("#\." functor)]]
-   ## TODO: Test these modules
-   ## [data
-   ##  [format
-   ##   [css (#+)]
-   ##   [markdown (#+)]]]
-   
-   ["@" target
-    ## [js (#+)]
-    ## [python (#+)]
-    ## [lua (#+)]
-    ## [ruby (#+)]
-    ## [php (#+)]
-    ## [common-lisp (#+)]
-    ## [scheme (#+)]
-    ]
-
-   ## [tool
-   ##  [compiler
-   ##   [language
-   ##    [lux
-   ##     [phase
-   ##      [generation
-   ##       [jvm (#+)]
-   ##       [js (#+)]
-   ##       ## [python (#+)]
-   ##       ## [lua (#+)]
-   ##       ## [ruby (#+)]
-   ##       ## [php (#+)]
-   ##       ## [common-lisp (#+)]
-   ##       ## [scheme (#+)]
-   ##       ]
-   ##      [extension
-   ##       [generation
-   ##        [jvm (#+)]
-   ##        [js (#+)]
-   ##        ## [python (#+)]
-   ##        ## [lua (#+)]
-   ##        ## [ruby (#+)]
-   ##        ]]
-   ##      ]]]]]
-   
-   ## [control
-   ##  ["._" predicate]
-   ##  [function
-   ##   ["._" contract]]
-   ##  [monad
-   ##   ["._" free]]
-   ##  [parser
-   ##   [type (#+)]]]
-   ## [data
-   ##  ["._" env]
-   ##  ["._" trace]
-   ##  ["._" store]
-   ##  [format
-   ##   ["._" context]
-   ##   ["._" html]
-   ##   ["._" css]
-   ##   ["._" binary]]
-   ##  [collection
-   ##   [tree
-   ##    [rose
-   ##     ["._" parser]]]
-   ##   [dictionary
-   ##    ["._" plist]]
-   ##   [set
-   ##    ["._" multi]]]
-   ##  [text
-   ##   ["._" buffer]]]
-   ## ["._" macro]
-   ## [type
-   ##  ["._" unit]
-   ##  ["._" refinement]
-   ##  ["._" quotient]]
-   ## [world
-   ##  ["._" environment]
-   ##  ["._" console]]
-   ## [compiler
-   ##  ["._" cli]
-   ##  ["._" default
-   ##   ["._" evaluation]
-   ##   [phase
-   ##    ["._" generation]
-   ##    [extension
-   ##     ["._" directive]]]
-   ##   ["._default" cache]]
-   ##  [meta
-   ##   ["._meta" io
-   ##    ["._meta_io" context]
-   ##    ["._meta_io" archive]]
-   ##   ["._meta" archive]
-   ##   ["._meta" cache]]]
-   ## ["._" interpreter
-   ##  ["._interpreter" type]]
-   ]
+    ["." random (#+ Random) ("#\." functor)]]]
   ## TODO: Must have 100% coverage on tests.
   ["." / #_
    ["#." abstract]
diff --git a/stdlib/source/test/lux/abstract.lux b/stdlib/source/test/lux/abstract.lux
index b31c10617..9fd3986b8 100644
--- a/stdlib/source/test/lux/abstract.lux
+++ b/stdlib/source/test/lux/abstract.lux
@@ -8,7 +8,6 @@
     ["#/." cofree]]
    ["#." enum]
    ["#." equivalence]
-   ["#." hash]
    ["#." fold]
    ["#." functor
     ["#/." contravariant]]
@@ -47,7 +46,6 @@
       /codec.test
       /enum.test
       /equivalence.test
-      /hash.test
       /fold.test
       /interval.test
       /monoid.test
diff --git a/stdlib/source/test/lux/abstract/codec.lux b/stdlib/source/test/lux/abstract/codec.lux
index da9a7b438..8c68f4cc6 100644
--- a/stdlib/source/test/lux/abstract/codec.lux
+++ b/stdlib/source/test/lux/abstract/codec.lux
@@ -24,7 +24,7 @@
        (|>> #json.Boolean
             [field]
             list
-            (json.object)))
+            json.object))
      (def: decode
        (json.get-boolean field)))))
 
diff --git a/stdlib/source/test/lux/abstract/equivalence.lux b/stdlib/source/test/lux/abstract/equivalence.lux
index 95f62218c..3009c289f 100644
--- a/stdlib/source/test/lux/abstract/equivalence.lux
+++ b/stdlib/source/test/lux/abstract/equivalence.lux
@@ -39,24 +39,6 @@
         ($_ _.and
             (_.for [/.functor]
                    ($contravariant.spec equivalence n.equivalence /.functor))
-            (_.cover [/.sum]
-                     (let [equivalence (/.sum n.equivalence i.equivalence)]
-                       (and (bit\= (\ n.equivalence = leftN leftN)
-                                   (\ equivalence = (#.Left leftN) (#.Left leftN)))
-                            (bit\= (\ n.equivalence = leftN rightN)
-                                   (\ equivalence = (#.Left leftN) (#.Left rightN)))
-                            (bit\= (\ i.equivalence = leftI leftI)
-                                   (\ equivalence = (#.Right leftI) (#.Right leftI)))
-                            (bit\= (\ i.equivalence = leftI rightI)
-                                   (\ equivalence = (#.Right leftI) (#.Right rightI))))))
-            (_.cover [/.product]
-                     (let [equivalence (/.product n.equivalence i.equivalence)]
-                       (and (bit\= (and (\ n.equivalence = leftN leftN)
-                                        (\ i.equivalence = leftI leftI))
-                                   (\ equivalence = [leftN leftI] [leftN leftI]))
-                            (bit\= (and (\ n.equivalence = leftN rightN)
-                                        (\ i.equivalence = leftI rightI))
-                                   (\ equivalence = [leftN leftI] [rightN rightI])))))
             (_.cover [/.rec]
                      (let [equivalence (: (Equivalence (List Nat))
                                           (/.rec (function (_ equivalence)
diff --git a/stdlib/source/test/lux/abstract/hash.lux b/stdlib/source/test/lux/abstract/hash.lux
deleted file mode 100644
index d829d489e..000000000
--- a/stdlib/source/test/lux/abstract/hash.lux
+++ /dev/null
@@ -1,37 +0,0 @@
-(.module:
-  [lux #*
-   ["_" test (#+ Test)]
-   [abstract
-    [monad (#+ do)]
-    {[0 #spec]
-     [/
-      [functor
-       ["$." contravariant]]]}]
-   [data
-    [number
-     ["n" nat]
-     ["i" int]]]
-   [math
-    ["." random (#+ Random)]]]
-  {1
-   ["." /]})
-
-(def: #export test
-  Test
-  (do random.monad
-    [left random.int
-     right random.nat]
-    (<| (_.covering /._)
-        ($_ _.and
-            (_.cover [/.sum]
-                     (let [hash (/.sum i.hash n.hash)]
-                       (and (n.= (\ i.hash hash left)
-                                 (\ hash hash (#.Left left)))
-                            (n.= (\ n.hash hash right)
-                                 (\ hash hash (#.Right right))))))
-            (_.cover [/.product]
-                     (let [hash (/.product i.hash n.hash)]
-                       (n.= (n.+ (\ i.hash hash left)
-                                 (\ n.hash hash right))
-                            (\ hash hash [left right]))))
-            ))))
diff --git a/stdlib/source/test/lux/control/concurrency/promise.lux b/stdlib/source/test/lux/control/concurrency/promise.lux
index 04dd1c220..51908a257 100644
--- a/stdlib/source/test/lux/control/concurrency/promise.lux
+++ b/stdlib/source/test/lux/control/concurrency/promise.lux
@@ -108,10 +108,10 @@
                                    (i.>= (.int to-wait)
                                          (duration.to-millis (instant.span pre post)))))))
             (wrap (do /.monad
-                    [?left (/.or (/.delay 100 leftE)
-                                 (/.delay 200 dummy))
-                     ?right (/.or (/.delay 200 dummy)
-                                  (/.delay 100 rightE))]
+                    [?left (/.or (wrap leftE)
+                                 (/.delay to-wait dummy))
+                     ?right (/.or (/.delay to-wait dummy)
+                                  (wrap rightE))]
                     (_.cover' [/.or]
                               (case [?left ?right]
                                 [(#.Left leftA) (#.Right rightA)]
@@ -121,10 +121,10 @@
                                 _
                                 false))))
             (wrap (do /.monad
-                    [leftA (/.either (/.delay 100 leftE)
-                                     (/.delay 200 dummy))
-                     rightA (/.either (/.delay 200 dummy)
-                                      (/.delay 100 rightE))]
+                    [leftA (/.either (wrap leftE)
+                                     (/.delay to-wait dummy))
+                     rightA (/.either (/.delay to-wait dummy)
+                                      (wrap rightE))]
                     (_.cover' [/.either]
                               (n.= (n.+ leftE rightE)
                                    (n.+ leftA rightA)))))
diff --git a/stdlib/source/test/lux/control/parser/analysis.lux b/stdlib/source/test/lux/control/parser/analysis.lux
index d3e966715..e089fb4d2 100644
--- a/stdlib/source/test/lux/control/parser/analysis.lux
+++ b/stdlib/source/test/lux/control/parser/analysis.lux
@@ -23,8 +23,7 @@
     ["." random (#+ Random)]]
    [tool
     [compiler
-     [reference (#+ Constant)
-      [variable (#+)]]
+     [reference (#+ Constant)]
      [language
       [lux
        ["." analysis]]]]]]
diff --git a/stdlib/source/test/lux/control/security/policy.lux b/stdlib/source/test/lux/control/security/policy.lux
index 647526b6c..b907e8e54 100644
--- a/stdlib/source/test/lux/control/security/policy.lux
+++ b/stdlib/source/test/lux/control/security/policy.lux
@@ -2,7 +2,6 @@
   [lux #*
    ["_" test (#+ Test)]
    [abstract
-    [equivalence (#+)]
     [hash (#+ Hash)]
     [monad (#+ do)]
     {[0 #spec]
diff --git a/stdlib/source/test/lux/data/collection/dictionary.lux b/stdlib/source/test/lux/data/collection/dictionary.lux
index e5f37d5de..2080e387a 100644
--- a/stdlib/source/test/lux/data/collection/dictionary.lux
+++ b/stdlib/source/test/lux/data/collection/dictionary.lux
@@ -4,7 +4,6 @@
    [abstract
     [hash (#+ Hash)]
     [monad (#+ do)]
-    ["." equivalence]
     {[0 #spec]
      [/
       ["$." equivalence]
@@ -13,6 +12,7 @@
     ["." try]
     ["." exception]]
    [data
+    ["." product]
     ["." maybe]
     [number
      ["n" nat]]
@@ -62,7 +62,7 @@
                    (is? hash (/.key-hash (/.new hash)))))
         
         (_.cover [/.entries /.keys /.values]
-                 (\ (list.equivalence (equivalence.product n.equivalence n.equivalence)) =
+                 (\ (list.equivalence (product.equivalence n.equivalence n.equivalence)) =
                     (/.entries dict)
                     (list.zip/2 (/.keys dict)
                                 (/.values dict))))
diff --git a/stdlib/source/test/lux/data/collection/list.lux b/stdlib/source/test/lux/data/collection/list.lux
index 792feeabc..ffde9bcf4 100644
--- a/stdlib/source/test/lux/data/collection/list.lux
+++ b/stdlib/source/test/lux/data/collection/list.lux
@@ -4,7 +4,6 @@
    [abstract
     [monad (#+ do)]
     ["." enum]
-    ["." equivalence]
     {[0 #spec]
      [/
       ["$." equivalence]
@@ -315,10 +314,10 @@
                      (and size-of-smaller-list!
                           can-extract-values!)))
           (_.cover [/.zip]
-                   (and (\ (/.equivalence (equivalence.product n.equivalence n.equivalence)) =
+                   (and (\ (/.equivalence (product.equivalence n.equivalence n.equivalence)) =
                            (/.zip/2 sample/0 sample/1)
                            ((/.zip 2) sample/0 sample/1))
-                        (\ (/.equivalence ($_ equivalence.product n.equivalence n.equivalence n.equivalence)) =
+                        (\ (/.equivalence ($_ product.equivalence n.equivalence n.equivalence n.equivalence)) =
                            (/.zip/3 sample/0 sample/1 sample/2)
                            ((/.zip 3) sample/0 sample/1 sample/2))))
 
diff --git a/stdlib/source/test/lux/data/collection/sequence.lux b/stdlib/source/test/lux/data/collection/sequence.lux
index e24e30c58..b21741752 100644
--- a/stdlib/source/test/lux/data/collection/sequence.lux
+++ b/stdlib/source/test/lux/data/collection/sequence.lux
@@ -2,8 +2,6 @@
   [lux #*
    ["_" test (#+ Test)]
    [abstract
-    [comonad (#+)]
-    [functor (#+)]
     [monad (#+ do)]
     [equivalence (#+ Equivalence)]
     ["." enum]
diff --git a/stdlib/source/test/lux/data/format/json.lux b/stdlib/source/test/lux/data/format/json.lux
index 61ba93d30..09f608543 100644
--- a/stdlib/source/test/lux/data/format/json.lux
+++ b/stdlib/source/test/lux/data/format/json.lux
@@ -31,7 +31,7 @@
   {1
    ["." / (#+ JSON) ("\." equivalence)]})
 
-(def: #export json
+(def: #export random
   (Random /.JSON)
   (random.rec
    (function (_ recur)
@@ -67,12 +67,12 @@
       (_.for [/.JSON])
       (`` ($_ _.and
               (_.for [/.equivalence]
-                     ($equivalence.spec /.equivalence ..json))
+                     ($equivalence.spec /.equivalence ..random))
               (_.for [/.codec]
-                     ($codec.spec /.equivalence /.codec ..json))
+                     ($codec.spec /.equivalence /.codec ..random))
 
               (do random.monad
-                [sample ..json]
+                [sample ..random]
                 (_.cover [/.Null /.null?]
                          (\ bit.equivalence =
                             (/.null? sample)
@@ -80,7 +80,7 @@
                               #/.Null true
                               _ false))))
               (do random.monad
-                [expected ..json]
+                [expected ..random]
                 (_.cover [/.format]
                          (|> expected
                              /.format
@@ -147,8 +147,8 @@
                     [/.Boolean /.get-boolean #/.Boolean random.bit bit.equivalence]
                     [/.Number /.get-number #/.Number random.safe-frac frac.equivalence]
                     [/.String /.get-string #/.String (random.ascii/alpha 1) text.equivalence]
-                    [/.Array /.get-array #/.Array (random.row 3 ..json) (row.equivalence /.equivalence)]
-                    [/.Object /.get-object #/.Object (random.dictionary text.hash 3 (random.ascii/alpha 1) ..json) (dictionary.equivalence /.equivalence)]
+                    [/.Array /.get-array #/.Array (random.row 3 ..random) (row.equivalence /.equivalence)]
+                    [/.Object /.get-object #/.Object (random.dictionary text.hash 3 (random.ascii/alpha 1) ..random) (dictionary.equivalence /.equivalence)]
                     ))
               (with-expansions [<boolean> (boolean)
                                 <number> (number)
diff --git a/stdlib/source/test/lux/data/format/xml.lux b/stdlib/source/test/lux/data/format/xml.lux
index a263b2a82..e95b843d2 100644
--- a/stdlib/source/test/lux/data/format/xml.lux
+++ b/stdlib/source/test/lux/data/format/xml.lux
@@ -55,16 +55,16 @@
   (random.and (..text 0 10)
               (..text 1 10)))
 
-(def: #export xml
+(def: #export random
   (Random XML)
-  (random.rec (function (_ xml)
+  (random.rec (function (_ random)
                 (random.or (..text 1 10)
                            (do random.monad
                              [size (..size 0 2)]
                              ($_ random.and
                                  ..identifier
                                  (random.dictionary name.hash size ..identifier (..text 0 10))
-                                 (random.list size xml)))))))
+                                 (random.list size random)))))))
 
 (def: #export test
   Test
@@ -72,9 +72,9 @@
       (_.for [/.XML])
       ($_ _.and
           (_.for [/.equivalence]
-                 ($equivalence.spec /.equivalence ..xml))
+                 ($equivalence.spec /.equivalence ..random))
           (_.for [/.codec]
-                 ($codec.spec /.equivalence /.codec ..xml))
+                 ($codec.spec /.equivalence /.codec ..random))
 
           (do {! random.monad}
             [(^@ identifier [namespace name]) ..identifier]
diff --git a/stdlib/source/test/lux/data/name.lux b/stdlib/source/test/lux/data/name.lux
index 904c14668..dd5238aa4 100644
--- a/stdlib/source/test/lux/data/name.lux
+++ b/stdlib/source/test/lux/data/name.lux
@@ -24,7 +24,7 @@
   (random.filter (|>> (text.contains? ".") not)
                  (random.unicode size)))
 
-(def: #export (name module-size short-size)
+(def: #export (random module-size short-size)
   (-> Nat Nat (Random Name))
   (random.and (..part module-size)
               (..part short-size)))
@@ -36,19 +36,19 @@
         [## First Name
          sizeM1 (|> random.nat (\ ! map (n.% 100)))
          sizeS1 (|> random.nat (\ ! map (|>> (n.% 100) (n.max 1))))
-         (^@ name1 [module1 short1]) (..name sizeM1 sizeS1)
+         (^@ name1 [module1 short1]) (..random sizeM1 sizeS1)
          ## Second Name
          sizeM2 (|> random.nat (\ ! map (n.% 100)))
          sizeS2 (|> random.nat (\ ! map (|>> (n.% 100) (n.max 1))))
-         (^@ name2 [module2 short2]) (..name sizeM2 sizeS2)]
+         (^@ name2 [module2 short2]) (..random sizeM2 sizeS2)]
         (_.for [.Name]
                ($_ _.and
                    (_.for [/.equivalence]
-                          ($equivalence.spec /.equivalence (..name sizeM1 sizeS1)))
+                          ($equivalence.spec /.equivalence (..random sizeM1 sizeS1)))
                    (_.for [/.order]
-                          ($order.spec /.order (..name sizeM1 sizeS1)))
+                          ($order.spec /.order (..random sizeM1 sizeS1)))
                    (_.for [/.codec]
-                          (_.and ($codec.spec /.equivalence /.codec (..name sizeM1 sizeS1))
+                          (_.and ($codec.spec /.equivalence /.codec (..random sizeM1 sizeS1))
                                  (let [(^open "/\.") /.codec]
                                    (_.test "Encoding an name without a module component results in text equal to the short of the name."
                                            (if (text.empty? module1)
diff --git a/stdlib/source/test/lux/data/product.lux b/stdlib/source/test/lux/data/product.lux
index 6e15c90b8..3c61091bb 100644
--- a/stdlib/source/test/lux/data/product.lux
+++ b/stdlib/source/test/lux/data/product.lux
@@ -28,6 +28,14 @@
             (_.for [/.equivalence]
                    ($equivalence.spec (/.equivalence n.equivalence i.equivalence)
                                       (random.and random.nat random.int)))
+            (do random.monad
+              [left random.int
+               right random.nat]
+              (_.cover [/.hash]
+                       (let [hash (/.hash i.hash n.hash)]
+                         (n.= (n.+ (\ i.hash hash left)
+                                   (\ n.hash hash right))
+                              (\ hash hash [left right])))))
             
             (<| (_.cover [/.left])
                 (n.= expected (/.left [expected dummy])))
diff --git a/stdlib/source/test/lux/data/sum.lux b/stdlib/source/test/lux/data/sum.lux
index 8dadcf272..7fbf816a1 100644
--- a/stdlib/source/test/lux/data/sum.lux
+++ b/stdlib/source/test/lux/data/sum.lux
@@ -11,7 +11,8 @@
    [data
     ["." text]
     [number
-     ["n" nat]]
+     ["n" nat]
+     ["i" int]]
     [collection
      ["." list ("#\." functor)]]]
    [math
@@ -25,75 +26,84 @@
       (_.for [.|])
       (do {! random.monad}
         [expected random.nat
-         shift random.nat])
-      ($_ _.and
-          (_.for [/.equivalence]
-                 ($equivalence.spec (/.equivalence n.equivalence n.equivalence)
-                                    (random.or random.nat random.nat)))
+         shift random.nat]
+        ($_ _.and
+            (_.for [/.equivalence]
+                   ($equivalence.spec (/.equivalence n.equivalence n.equivalence)
+                                      (random.or random.nat random.nat)))
+            (do random.monad
+              [left random.int
+               right random.nat]
+              (_.cover [/.hash]
+                       (let [hash (/.hash i.hash n.hash)]
+                         (and (n.= (\ i.hash hash left)
+                                   (\ hash hash (#.Left left)))
+                              (n.= (\ n.hash hash right)
+                                   (\ hash hash (#.Right right)))))))
 
-          (_.cover [/.left]
-                   (|> (/.left expected)
-                       (: (| Nat Nat))
-                       (case> (0 #0 actual) (n.= expected actual)
-                              _ false)))
-          (_.cover [/.right]
-                   (|> (/.right expected)
-                       (: (| Nat Nat))
-                       (case> (0 #1 actual) (n.= expected actual)
-                              _ false)))
-          (_.cover [/.either]
-                   (and (|> (/.left expected)
-                            (: (| Nat Nat))
-                            (/.either (n.+ shift) (n.- shift))
-                            (n.= (n.+ shift expected)))
-                        (|> (/.right expected)
-                            (: (| Nat Nat))
-                            (/.either (n.+ shift) (n.- shift))
-                            (n.= (n.- shift expected)))))
-          (_.cover [/.each]
-                   (and (|> (/.left expected)
-                            (: (| Nat Nat))
-                            (/.each (n.+ shift) (n.- shift))
-                            (case> (0 #0 actual) (n.= (n.+ shift expected) actual) _ false))
-                        (|> (/.right expected)
-                            (: (| Nat Nat))
-                            (/.each (n.+ shift) (n.- shift))
-                            (case> (0 #1 actual) (n.= (n.- shift expected) actual) _ false))))
-          (do !
-            [size (\ ! map (n.% 5) random.nat)
-             expected (random.list size random.nat)]
-            ($_ _.and
-                (_.cover [/.lefts]
-                         (let [actual (: (List (| Nat Nat))
-                                         (list\map /.left expected))]
-                           (and (\ (list.equivalence n.equivalence) =
-                                   expected
-                                   (/.lefts actual))
-                                (\ (list.equivalence n.equivalence) =
-                                   (list)
-                                   (/.rights actual)))))
-                (_.cover [/.rights]
-                         (let [actual (: (List (| Nat Nat))
-                                         (list\map /.right expected))]
-                           (and (\ (list.equivalence n.equivalence) =
-                                   expected
-                                   (/.rights actual))
-                                (\ (list.equivalence n.equivalence) =
-                                   (list)
-                                   (/.lefts actual)))))
-                (_.cover [/.partition]
-                         (let [[lefts rights] (|> expected
-                                                  (list\map (function (_ value)
-                                                              (if (n.even? value)
-                                                                (/.left value)
-                                                                (/.right value))))
-                                                  (: (List (| Nat Nat)))
-                                                  /.partition)]
-                           (and (\ (list.equivalence n.equivalence) =
-                                   (list.filter n.even? expected)
-                                   lefts)
-                                (\ (list.equivalence n.equivalence) =
-                                   (list.filter (|>> n.even? not) expected)
-                                   rights))))
-                ))
-          )))
+            (_.cover [/.left]
+                     (|> (/.left expected)
+                         (: (| Nat Nat))
+                         (case> (0 #0 actual) (n.= expected actual)
+                                _ false)))
+            (_.cover [/.right]
+                     (|> (/.right expected)
+                         (: (| Nat Nat))
+                         (case> (0 #1 actual) (n.= expected actual)
+                                _ false)))
+            (_.cover [/.either]
+                     (and (|> (/.left expected)
+                              (: (| Nat Nat))
+                              (/.either (n.+ shift) (n.- shift))
+                              (n.= (n.+ shift expected)))
+                          (|> (/.right expected)
+                              (: (| Nat Nat))
+                              (/.either (n.+ shift) (n.- shift))
+                              (n.= (n.- shift expected)))))
+            (_.cover [/.each]
+                     (and (|> (/.left expected)
+                              (: (| Nat Nat))
+                              (/.each (n.+ shift) (n.- shift))
+                              (case> (0 #0 actual) (n.= (n.+ shift expected) actual) _ false))
+                          (|> (/.right expected)
+                              (: (| Nat Nat))
+                              (/.each (n.+ shift) (n.- shift))
+                              (case> (0 #1 actual) (n.= (n.- shift expected) actual) _ false))))
+            (do !
+              [size (\ ! map (n.% 5) random.nat)
+               expected (random.list size random.nat)]
+              ($_ _.and
+                  (_.cover [/.lefts]
+                           (let [actual (: (List (| Nat Nat))
+                                           (list\map /.left expected))]
+                             (and (\ (list.equivalence n.equivalence) =
+                                     expected
+                                     (/.lefts actual))
+                                  (\ (list.equivalence n.equivalence) =
+                                     (list)
+                                     (/.rights actual)))))
+                  (_.cover [/.rights]
+                           (let [actual (: (List (| Nat Nat))
+                                           (list\map /.right expected))]
+                             (and (\ (list.equivalence n.equivalence) =
+                                     expected
+                                     (/.rights actual))
+                                  (\ (list.equivalence n.equivalence) =
+                                     (list)
+                                     (/.lefts actual)))))
+                  (_.cover [/.partition]
+                           (let [[lefts rights] (|> expected
+                                                    (list\map (function (_ value)
+                                                                (if (n.even? value)
+                                                                  (/.left value)
+                                                                  (/.right value))))
+                                                    (: (List (| Nat Nat)))
+                                                    /.partition)]
+                             (and (\ (list.equivalence n.equivalence) =
+                                     (list.filter n.even? expected)
+                                     lefts)
+                                  (\ (list.equivalence n.equivalence) =
+                                     (list.filter (|>> n.even? not) expected)
+                                     rights))))
+                  ))
+            ))))
diff --git a/stdlib/source/test/lux/data/text.lux b/stdlib/source/test/lux/data/text.lux
index 2dcd2bfa8..2cf0e2cfd 100644
--- a/stdlib/source/test/lux/data/text.lux
+++ b/stdlib/source/test/lux/data/text.lux
@@ -22,6 +22,7 @@
   ["." / #_
    ["#." buffer]
    ["#." encoding]
+   ["#." format]
    ["#." regex]]
   {1
    ["." /]})
@@ -299,5 +300,6 @@
 
           /buffer.test
           /encoding.test
+          /format.test
           /regex.test
           )))
diff --git a/stdlib/source/test/lux/data/text/format.lux b/stdlib/source/test/lux/data/text/format.lux
new file mode 100644
index 000000000..a8004f919
--- /dev/null
+++ b/stdlib/source/test/lux/data/text/format.lux
@@ -0,0 +1,163 @@
+(.module:
+  [lux #*
+   ["_" test (#+ Test)]
+   [abstract
+    [monad (#+ do)]
+    [equivalence (#+ Equivalence)]
+    [functor
+     {[0 #spec]
+      [/
+       ["$." contravariant]]}]]
+   [control
+    ["." try]]
+   [data
+    ["." text ("#\." equivalence)]
+    ["." bit]
+    ["." name]
+    [number
+     ["." nat]
+     ["." int]
+     ["." rev]
+     ["." frac]
+     ["." ratio]]
+    [format
+     ["." xml]
+     ["." json]]
+    [collection
+     ["." list ("#\." functor)]]]
+   [time
+    ["." instant]
+    ["." duration]
+    ["." date]]
+   [math
+    ["." random (#+ Random) ("#\." monad)]
+    ["." modular]]
+   [macro
+    ["." code]]
+   [meta
+    ["." location]]
+   ["." type]]
+  ["$." /// #_
+   [format
+    ["#." xml]
+    ["#." json]]
+   ["#." name]
+   [//
+    ["#." type]
+    [macro
+     ["#." code]]]]
+  {1
+   ["." /]})
+
+(structure: (equivalence example)
+  (All [a] (-> a (Equivalence (/.Format a))))
+
+  (def: (= reference subject)
+    (text\= (reference example) (subject example))))
+
+(def: random-contravariant
+  (Random (Ex [a] [(/.Format a)
+                   (Random a)]))
+  ($_ random.either
+      (random\wrap [/.bit random.bit])
+      (random\wrap [/.nat random.nat])
+      (random\wrap [/.int random.int])
+      (random\wrap [/.rev random.rev])
+      (random\wrap [/.frac random.frac])
+      ))
+
+(def: #export test
+  Test
+  (<| (_.covering /._)
+      (_.for [/.Format])
+      (`` ($_ _.and
+              (_.for [/.functor]
+                     (do random.monad
+                       [[format random] ..random-contravariant
+                        example random]
+                       ($contravariant.spec (..equivalence example)
+                                            format
+                                            /.functor)))
+              
+              (do random.monad
+                [left (random.unicode 5)
+                 mid (random.unicode 5)
+                 right (random.unicode 5)]
+                (_.cover [/.format]
+                         (text\= (/.format left mid right)
+                                 ($_ "lux text concat" left mid right))))
+              (~~ (template [<format> <codec> <random>]
+                    [(do random.monad
+                       [sample <random>]
+                       (_.cover [<format>]
+                                (text\= (\ <codec> encode sample)
+                                        (<format> sample))))]
+
+                    [/.bit bit.codec random.bit]
+                    [/.nat nat.decimal random.nat]
+                    [/.int int.decimal random.int]
+                    [/.rev rev.decimal random.rev]
+                    [/.frac frac.decimal random.frac]
+                    [/.ratio ratio.codec random.ratio]
+                    [/.name name.codec ($///name.random 5 5)]
+                    [/.xml xml.codec $///xml.random]
+                    [/.json json.codec $///json.random]
+                    [/.instant instant.codec random.instant]
+                    [/.duration duration.codec random.duration]
+                    [/.date date.codec random.date]
+                    
+                    [/.nat/2 nat.binary random.nat]
+                    [/.nat/8 nat.octal random.nat]
+                    [/.nat/10 nat.decimal random.nat]
+                    [/.nat/16 nat.hex random.nat]
+                    
+                    [/.int/2 int.binary random.int]
+                    [/.int/8 int.octal random.int]
+                    [/.int/10 int.decimal random.int]
+                    [/.int/16 int.hex random.int]
+                    
+                    [/.rev/2 rev.binary random.rev]
+                    [/.rev/8 rev.octal random.rev]
+                    [/.rev/10 rev.decimal random.rev]
+                    [/.rev/16 rev.hex random.rev]
+                    
+                    [/.frac/2 frac.binary random.frac]
+                    [/.frac/8 frac.octal random.frac]
+                    [/.frac/10 frac.decimal random.frac]
+                    [/.frac/16 frac.hex random.frac]
+                    ))
+              (~~ (template [<format> <alias> <random>]
+                    [(do random.monad
+                       [sample <random>]
+                       (_.cover [<format>]
+                                (text\= (<alias> sample)
+                                        (<format> sample))))]
+
+                    [/.text text.encode (random.unicode 5)]
+                    [/.code code.format $///code.random]
+                    [/.type type.format $///type.random]
+                    [/.location location.format
+                     ($_ random.and
+                         (random.unicode 5)
+                         random.nat
+                         random.nat)]
+                    ))
+              (do random.monad
+                [members (random.list 5 random.nat)]
+                (_.cover [/.list]
+                         (text\= (/.list /.nat members)
+                                 (|> members
+                                     (list\map /.nat)
+                                     (text.join-with " ")
+                                     list
+                                     (/.list (|>>))))))
+              (do {! random.monad}
+                [modulus (random.one (|>> modular.from-int
+                                          try.to-maybe)
+                                     random.int)
+                 sample (\ ! map (modular.mod modulus)
+                           random.int)]
+                (_.cover [/.mod]
+                         (text\= (\ (modular.codec modulus) encode sample)
+                                 (/.mod sample))))
+              ))))
diff --git a/stdlib/source/test/lux/macro/syntax/common.lux b/stdlib/source/test/lux/macro/syntax/common.lux
index d25fff149..998671dd5 100644
--- a/stdlib/source/test/lux/macro/syntax/common.lux
+++ b/stdlib/source/test/lux/macro/syntax/common.lux
@@ -5,13 +5,14 @@
     ["." random (#+ Random)]]
    [abstract
     [monad (#+ do)]
-    ["." equivalence (#+ Equivalence)]]
+    [equivalence (#+ Equivalence)]]
    [control
     [pipe (#+ case>)]
     ["." try]
     ["<>" parser
      ["<c>" code]]]
    [data
+    ["." product]
     ["." bit ("#\." equivalence)]
     ["." name]
     ["." text]
@@ -31,7 +32,7 @@
 (def: annotations-equivalence
   (Equivalence /.Annotations)
   (list.equivalence
-   (equivalence.product name.equivalence
+   (product.equivalence name.equivalence
                         code.equivalence)))
 
 (def: random-text
@@ -111,7 +112,7 @@
                          /writer.declaration list
                          (<c>.run /reader.declaration)
                          (case> (#try.Success actual)
-                                (let [equivalence (equivalence.product text.equivalence
+                                (let [equivalence (product.equivalence text.equivalence
                                                                        (list.equivalence text.equivalence))]
                                   (\ equivalence = expected actual))
                                 
@@ -126,7 +127,7 @@
                          /writer.typed-input list
                          (<c>.run /reader.typed-input)
                          (case> (#try.Success actual)
-                                (let [equivalence (equivalence.product code.equivalence code.equivalence)]
+                                (let [equivalence (product.equivalence code.equivalence code.equivalence)]
                                   (\ equivalence = expected actual))
                                 
                                 (#try.Failure error)
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/phase/synthesis/variable.lux b/stdlib/source/test/lux/tool/compiler/language/lux/phase/synthesis/variable.lux
index 225578071..5a18e6d40 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/phase/synthesis/variable.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/phase/synthesis/variable.lux
@@ -23,7 +23,7 @@
      ["." analysis]
      ["." synthesis (#+ Side Member Path Synthesis)]
      [///
-      [reference (#+)
+      [reference
        ["." variable]]]]]})
 
 (template: (!expect <pattern> <value>)
diff --git a/stdlib/source/test/lux/type.lux b/stdlib/source/test/lux/type.lux
index 08a4033c5..239e77434 100644
--- a/stdlib/source/test/lux/type.lux
+++ b/stdlib/source/test/lux/type.lux
@@ -30,7 +30,7 @@
   (r.Random Name)
   (r.and ..short ..short))
 
-(def: #export type
+(def: #export random
   (r.Random Type)
   (let [(^open "R\.") r.monad]
     (r.rec (function (_ recur)
@@ -56,7 +56,7 @@
   (<| (_.context (%.name (name-of /._)))
       ($_ _.and
           (do r.monad
-            [sample ..type]
+            [sample ..random]
             (_.test "Every type is equal to itself."
                     (\ /.equivalence = sample sample)))
           (_.test "Can apply quantified types (universal and existential quantification)."
@@ -85,7 +85,7 @@
                                 (/.un-name aliased))))))
           (do {! r.monad}
             [size (|> r.nat (\ ! map (n.% 3)))
-             members (|> ..type
+             members (|> ..random
                          (r.filter (function (_ type)
                                      (case type
                                        (^or (#.Sum _) (#.Product _))
@@ -111,8 +111,8 @@
                     )))
           (do {! r.monad}
             [size (|> r.nat (\ ! map (n.% 3)))
-             members (M.seq ! (list.repeat size ..type))
-             extra (|> ..type
+             members (M.seq ! (list.repeat size ..random))
+             extra (|> ..random
                        (r.filter (function (_ type)
                                    (case type
                                      (^or (#.Function _) (#.Apply _))
@@ -134,7 +134,7 @@
                 ))
           (do {! r.monad}
             [size (|> r.nat (\ ! map (n.% 3)))
-             extra (|> ..type
+             extra (|> ..random
                        (r.filter (function (_ type)
                                    (case type
                                      (^or (#.UnivQ _) (#.ExQ _))