Migrate to `unittest2` (#125)

* Migrate to `unittest2`

why:
  Global symbol overflow when running NIM 1.2 on Github ci suggests that
  unit tests run sort of separately. The replacement library `unittest2`
  provides that.

* Build ci dependencies

.github/workflows/ci.yml

@@ -155,6 +155,7 @@ jobs:
           fi
           nim --version
           nimble --version
+          nimble install -y --depsOnly
           env TEST_LANG=c nimble test
           env TEST_LANG=cpp nimble test
 
@@ -173,5 +174,6 @@ jobs:
       - name: Test using VCC
         if: runner.os == 'Windows'
         run: |
+          nimble install -y --depsOnly
           env TEST_LANG=c nimble testvcc
           env TEST_LANG=cpp nimble testvcc

stew.nimble

@@ -7,7 +7,8 @@ description   = "Backports, standard library candidates and small utilities that
 license       = "Apache License 2.0"
 skipDirs      = @["tests"]
 
-requires "nim >= 1.2.0"
+requires "nim >= 1.2.0",
+         "unittest2"
 
 ### Helper functions
 proc test(args, path: string) =

tests/ranges/tbitranges.nim

@@ -1,5 +1,5 @@
 import
-  random, unittest,
+  random, unittest2,
   ../../stew/ranges/bitranges, ../../stew/bitseqs
 
 proc randomBytes(n: int): seq[byte] =

tests/ranges/tstackarrays.nim

@@ -1,5 +1,5 @@
 import
-  unittest, math,
+  unittest2, math,
   ../../stew/ptrops,
   ../../stew/ranges/[stackarrays]
 

tests/ranges/ttypedranges.nim

@@ -1,5 +1,5 @@
 import
-  unittest, sets,
+  unittest2, sets,
   ../../stew/ranges/[typedranges, ptr_arith]
 
 suite "Typed ranges":

tests/test_arrayops.nim

@@ -10,7 +10,7 @@
 {.used.}
 
 import
-  std/unittest,
+  unittest2,
   ../stew/arrayops
 
 suite "arrayops":

tests/test_assign2.nim

@@ -1,5 +1,5 @@
 import
-  std/unittest,
+  unittest2,
   ../stew/assign2
 
 suite "assign2":

tests/test_base10.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/base10
 
 when defined(nimHasUsed): {.used.}

tests/test_base32.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/base32
 
 when defined(nimHasUsed): {.used.}

tests/test_base58.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/base58
 
 when defined(nimHasUsed): {.used.}

tests/test_base64.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/[base64, byteutils]
 
 when defined(nimHasUsed): {.used.}

tests/test_bitops2.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 
 import ../stew/bitops2
 

tests/test_bitseqs.nim

@@ -1,5 +1,5 @@
 import
-  unittest, strformat,
+  unittest2, strformat,
   ../stew/[bitseqs]
 
 suite "Bit fields":

tests/test_byteutils.nim

@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 import
-  std/unittest,
+  unittest2,
   ../stew/byteutils
 
 proc compilationTest {.exportc: "compilationTest".} =

tests/test_ctops.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/ctops
 
 suite "Constant-time operations test suite":

tests/test_endians2.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 
 import ../stew/endians2
 

tests/test_interval_set.nim

@@ -10,7 +10,7 @@
 # distributed except according to those terms.
 
 import
-  std/unittest,
+  unittest2,
   ../stew/interval_set
 
 const

tests/test_io2.nim

@@ -1,4 +1,4 @@
-import unittest
+import unittest2
 import ../stew/io2
 
 suite "OS Input/Output procedures test suite":

tests/test_keyed_queue.nim

@@ -9,7 +9,8 @@
 # according to those terms.
 
 import
-  std/[algorithm, sequtils, strformat, strutils, tables, unittest],
+  std/[algorithm, sequtils, strformat, strutils, tables],
+  unittest2,
   ../stew/keyed_queue,
   ../stew/keyed_queue/kq_debug
 

tests/test_leb128.nim

@@ -1,5 +1,5 @@
 import
-  unittest, random,
+  unittest2, random,
   ../stew/[byteutils, leb128, results]
 
 const edgeValues = {

tests/test_macros.nim

@@ -1,5 +1,5 @@
 import
-  unittest,
+  unittest2,
   ../stew/shims/macros
 
 

tests/test_objects.nim

@@ -1,5 +1,5 @@
 import
-  unittest, typetraits,
+  unittest2, typetraits,
   ../stew/objects
 
 when defined(nimHasUsed):

tests/test_ptrops.nim

@@ -7,7 +7,7 @@
 #
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
-import unittest
+import unittest2
 
 import ../stew/ptrops
 

tests/test_sequtils2.nim

@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 import
-  std/unittest,
+  unittest2,
   ../stew/sequtils2
 
 suite "sequtils2":

tests/test_sets.nim

@@ -1,5 +1,5 @@
 import
-  unittest,
+  unittest2,
   ../stew/shims/sets
 
 suite "shims/sets":

tests/test_sorted_set.nim

@@ -11,7 +11,7 @@
 import
   std/[algorithm, sequtils, strformat, tables],
   ../stew/sorted_set,
-  unittest
+  unittest2
 
 const
   keyList = [

tests/test_templateutils.nim

@@ -1,5 +1,5 @@
 import
-  unittest,
+  unittest2,
   ../stew/templateutils
 
 var computations = newSeq[string]()

tests/test_varints.nim

@@ -1,5 +1,5 @@
 import
-  unittest, random,
+  unittest2, random,
   ../stew/[varints, byteutils]
 
 const edgeValues = {

tests/test_winacl.nim

@@ -1,4 +1,4 @@
-import std/unittest
+import unittest2
 import ../stew/io2
 
 when defined(windows):