remove isMainModule from json,os,sequtils (#14572)

* move json.isMainModule => tjson

* move isMainModule => tos,tsequtils

lib/pure/collections/sequtils.nim

@@ -1065,464 +1065,3 @@ iterator items*[T](xs: iterator: T): T =
   ## templates.
   for x in xs():
     yield x
-
-when isMainModule:
-  import strutils
-  from algorithm import sorted
-
-  # helper for testing double substitution side effects which are handled
-  # by `evalOnceAs`
-  var counter = 0
-  proc identity[T](a: T): auto =
-    counter.inc
-    a
-
-  block: # concat test
-    let
-      s1 = @[1, 2, 3]
-      s2 = @[4, 5]
-      s3 = @[6, 7]
-      total = concat(s1, s2, s3)
-    assert total == @[1, 2, 3, 4, 5, 6, 7]
-
-  block: # count test
-    let
-      s1 = @[1, 2, 3, 2]
-      s2 = @['a', 'b', 'x', 'a']
-      a1 = [1, 2, 3, 2]
-      a2 = ['a', 'b', 'x', 'a']
-      r0 = count(s1, 0)
-      r1 = count(s1, 1)
-      r2 = count(s1, 2)
-      r3 = count(s2, 'y')
-      r4 = count(s2, 'x')
-      r5 = count(s2, 'a')
-      ar0 = count(a1, 0)
-      ar1 = count(a1, 1)
-      ar2 = count(a1, 2)
-      ar3 = count(a2, 'y')
-      ar4 = count(a2, 'x')
-      ar5 = count(a2, 'a')
-    assert r0 == 0
-    assert r1 == 1
-    assert r2 == 2
-    assert r3 == 0
-    assert r4 == 1
-    assert r5 == 2
-    assert ar0 == 0
-    assert ar1 == 1
-    assert ar2 == 2
-    assert ar3 == 0
-    assert ar4 == 1
-    assert ar5 == 2
-
-  block: # cycle tests
-    let
-      a = @[1, 2, 3]
-      b: seq[int] = @[]
-      c = [1, 2, 3]
-
-    doAssert a.cycle(3) == @[1, 2, 3, 1, 2, 3, 1, 2, 3]
-    doAssert a.cycle(0) == @[]
-    #doAssert a.cycle(-1) == @[] # will not compile!
-    doAssert b.cycle(3) == @[]
-    doAssert c.cycle(3) == @[1, 2, 3, 1, 2, 3, 1, 2, 3]
-    doAssert c.cycle(0) == @[]
-
-  block: # repeat tests
-    assert repeat(10, 5) == @[10, 10, 10, 10, 10]
-    assert repeat(@[1, 2, 3], 2) == @[@[1, 2, 3], @[1, 2, 3]]
-    assert repeat([1, 2, 3], 2) == @[[1, 2, 3], [1, 2, 3]]
-
-  block: # deduplicates test
-    let
-      dup1 = @[1, 1, 3, 4, 2, 2, 8, 1, 4]
-      dup2 = @["a", "a", "c", "d", "d"]
-      dup3 = [1, 1, 3, 4, 2, 2, 8, 1, 4]
-      dup4 = ["a", "a", "c", "d", "d"]
-      unique1 = deduplicate(dup1)
-      unique2 = deduplicate(dup2)
-      unique3 = deduplicate(dup3)
-      unique4 = deduplicate(dup4)
-      unique5 = deduplicate(dup1.sorted, true)
-      unique6 = deduplicate(dup2, true)
-      unique7 = deduplicate(dup3.sorted, true)
-      unique8 = deduplicate(dup4, true)
-    assert unique1 == @[1, 3, 4, 2, 8]
-    assert unique2 == @["a", "c", "d"]
-    assert unique3 == @[1, 3, 4, 2, 8]
-    assert unique4 == @["a", "c", "d"]
-    assert unique5 == @[1, 2, 3, 4, 8]
-    assert unique6 == @["a", "c", "d"]
-    assert unique7 == @[1, 2, 3, 4, 8]
-    assert unique8 == @["a", "c", "d"]
-
-  block: # zip test
-    let
-      short = @[1, 2, 3]
-      long = @[6, 5, 4, 3, 2, 1]
-      words = @["one", "two", "three"]
-      ashort = [1, 2, 3]
-      along = [6, 5, 4, 3, 2, 1]
-      awords = ["one", "two", "three"]
-      zip1 = zip(short, long)
-      zip2 = zip(short, words)
-      zip3 = zip(ashort, along)
-    assert zip1 == @[(1, 6), (2, 5), (3, 4)]
-    assert zip2 == @[(1, "one"), (2, "two"), (3, "three")]
-    assert zip3 == @[(1, 6), (2, 5), (3, 4)]
-    assert zip1[2][1] == 4
-    assert zip2[2][1] == "three"
-    assert zip3[2][1] == 4
-    when (NimMajor, NimMinor) <= (1, 0):
-      let
-        # In Nim 1.0.x and older, zip returned a seq of tuple strictly
-        # with fields named "a" and "b".
-        zipAb = zip(ashort, awords)
-      assert zipAb == @[(a: 1, b: "one"), (2, "two"), (3, "three")]
-      assert zipAb[2].b == "three"
-    else:
-      let
-        # As zip returns seq of anonymous tuples, they can be assigned
-        # to any variable that's a sequence of named tuples too.
-        zipXy: seq[tuple[x: int, y: string]] = zip(ashort, awords)
-        zipMn: seq[tuple[m: int, n: string]] = zip(ashort, words)
-      assert zipXy == @[(x: 1, y: "one"), (2, "two"), (3, "three")]
-      assert zipMn == @[(m: 1, n: "one"), (2, "two"), (3, "three")]
-      assert zipXy[2].y == "three"
-      assert zipMn[2].n == "three"
-
-  block: # distribute tests
-    let numbers = @[1, 2, 3, 4, 5, 6, 7]
-    doAssert numbers.distribute(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
-    doAssert numbers.distribute(6)[0] == @[1, 2]
-    doAssert numbers.distribute(6)[5] == @[7]
-    let a = @[1, 2, 3, 4, 5, 6, 7]
-    doAssert a.distribute(1, true) == @[@[1, 2, 3, 4, 5, 6, 7]]
-    doAssert a.distribute(1, false) == @[@[1, 2, 3, 4, 5, 6, 7]]
-    doAssert a.distribute(2, true) == @[@[1, 2, 3, 4], @[5, 6, 7]]
-    doAssert a.distribute(2, false) == @[@[1, 2, 3, 4], @[5, 6, 7]]
-    doAssert a.distribute(3, true) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
-    doAssert a.distribute(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
-    doAssert a.distribute(4, true) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
-    doAssert a.distribute(4, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
-    doAssert a.distribute(5, true) == @[@[1, 2], @[3, 4], @[5], @[6], @[7]]
-    doAssert a.distribute(5, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7], @[]]
-    doAssert a.distribute(6, true) == @[@[1, 2], @[3], @[4], @[5], @[6], @[7]]
-    doAssert a.distribute(6, false) == @[
-      @[1, 2], @[3, 4], @[5, 6], @[7], @[], @[]]
-    doAssert a.distribute(8, false) == a.distribute(8, true)
-    doAssert a.distribute(90, false) == a.distribute(90, true)
-    var b = @[0]
-    for f in 1 .. 25: b.add(f)
-    doAssert b.distribute(5, true)[4].len == 5
-    doAssert b.distribute(5, false)[4].len == 2
-
-  block: # map test
-    let
-      numbers = @[1, 4, 5, 8, 9, 7, 4]
-      anumbers = [1, 4, 5, 8, 9, 7, 4]
-      m1 = map(numbers, proc(x: int): int = 2*x)
-      m2 = map(anumbers, proc(x: int): int = 2*x)
-    assert m1 == @[2, 8, 10, 16, 18, 14, 8]
-    assert m2 == @[2, 8, 10, 16, 18, 14, 8]
-
-  block: # apply test
-    var a = @["1", "2", "3", "4"]
-    apply(a, proc(x: var string) = x &= "42")
-    assert a == @["142", "242", "342", "442"]
-
-  block: # filter proc test
-    let
-      colors = @["red", "yellow", "black"]
-      acolors = ["red", "yellow", "black"]
-      f1 = filter(colors, proc(x: string): bool = x.len < 6)
-      f2 = filter(colors) do (x: string) -> bool: x.len > 5
-      f3 = filter(acolors, proc(x: string): bool = x.len < 6)
-      f4 = filter(acolors) do (x: string) -> bool: x.len > 5
-    assert f1 == @["red", "black"]
-    assert f2 == @["yellow"]
-    assert f3 == @["red", "black"]
-    assert f4 == @["yellow"]
-
-  block: # filter iterator test
-    let numbers = @[1, 4, 5, 8, 9, 7, 4]
-    let anumbers = [1, 4, 5, 8, 9, 7, 4]
-    assert toSeq(filter(numbers, proc (x: int): bool = x mod 2 == 0)) ==
-      @[4, 8, 4]
-    assert toSeq(filter(anumbers, proc (x: int): bool = x mod 2 == 0)) ==
-      @[4, 8, 4]
-
-  block: # keepIf test
-    var floats = @[13.0, 12.5, 5.8, 2.0, 6.1, 9.9, 10.1]
-    keepIf(floats, proc(x: float): bool = x > 10)
-    assert floats == @[13.0, 12.5, 10.1]
-
-  block: # delete tests
-    let outcome = @[1, 1, 1, 1, 1, 1, 1, 1]
-    var dest = @[1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
-    dest.delete(3, 8)
-    assert outcome == dest, """\
-    Deleting range 3-9 from [1,1,1,2,2,2,2,2,2,1,1,1,1,1]
-    is [1,1,1,1,1,1,1,1]"""
-    var x = @[1, 2, 3]
-    x.delete(100, 100)
-    assert x == @[1, 2, 3]
-
-  block: # insert tests
-    var dest = @[1, 1, 1, 1, 1, 1, 1, 1]
-    let
-      src = @[2, 2, 2, 2, 2, 2]
-      outcome = @[1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
-    dest.insert(src, 3)
-    assert dest == outcome, """\
-    Inserting [2,2,2,2,2,2] into [1,1,1,1,1,1,1,1]
-    at 3 is [1,1,1,2,2,2,2,2,2,1,1,1,1,1]"""
-
-  block: # filterIt test
-    let
-      temperatures = @[-272.15, -2.0, 24.5, 44.31, 99.9, -113.44]
-      acceptable = filterIt(temperatures, it < 50 and it > -10)
-      notAcceptable = filterIt(temperatures, it > 50 or it < -10)
-    assert acceptable == @[-2.0, 24.5, 44.31]
-    assert notAcceptable == @[-272.15, 99.9, -113.44]
-
-  block: # keepItIf test
-    var candidates = @["foo", "bar", "baz", "foobar"]
-    keepItIf(candidates, it.len == 3 and it[0] == 'b')
-    assert candidates == @["bar", "baz"]
-
-  block: # all
-    let
-      numbers = @[1, 4, 5, 8, 9, 7, 4]
-      anumbers = [1, 4, 5, 8, 9, 7, 4]
-      len0seq: seq[int] = @[]
-    assert all(numbers, proc (x: int): bool = return x < 10) == true
-    assert all(numbers, proc (x: int): bool = return x < 9) == false
-    assert all(len0seq, proc (x: int): bool = return false) == true
-    assert all(anumbers, proc (x: int): bool = return x < 10) == true
-    assert all(anumbers, proc (x: int): bool = return x < 9) == false
-
-  block: # allIt
-    let
-      numbers = @[1, 4, 5, 8, 9, 7, 4]
-      anumbers = [1, 4, 5, 8, 9, 7, 4]
-      len0seq: seq[int] = @[]
-    assert allIt(numbers, it < 10) == true
-    assert allIt(numbers, it < 9) == false
-    assert allIt(len0seq, false) == true
-    assert allIt(anumbers, it < 10) == true
-    assert allIt(anumbers, it < 9) == false
-
-  block: # any
-    let
-      numbers = @[1, 4, 5, 8, 9, 7, 4]
-      anumbers = [1, 4, 5, 8, 9, 7, 4]
-      len0seq: seq[int] = @[]
-    assert any(numbers, proc (x: int): bool = return x > 8) == true
-    assert any(numbers, proc (x: int): bool = return x > 9) == false
-    assert any(len0seq, proc (x: int): bool = return true) == false
-    assert any(anumbers, proc (x: int): bool = return x > 8) == true
-    assert any(anumbers, proc (x: int): bool = return x > 9) == false
-
-  block: # anyIt
-    let
-      numbers = @[1, 4, 5, 8, 9, 7, 4]
-      anumbers = [1, 4, 5, 8, 9, 7, 4]
-      len0seq: seq[int] = @[]
-    assert anyIt(numbers, it > 8) == true
-    assert anyIt(numbers, it > 9) == false
-    assert anyIt(len0seq, true) == false
-    assert anyIt(anumbers, it > 8) == true
-    assert anyIt(anumbers, it > 9) == false
-
-  block: # toSeq test
-    block:
-      let
-        numeric = @[1, 2, 3, 4, 5, 6, 7, 8, 9]
-        oddNumbers = toSeq(filter(numeric) do (x: int) -> bool:
-          if x mod 2 == 1:
-            result = true)
-      assert oddNumbers == @[1, 3, 5, 7, 9]
-
-    block:
-      doAssert [1, 2].toSeq == @[1, 2]
-      doAssert @[1, 2].toSeq == @[1, 2]
-
-      doAssert @[1, 2].toSeq == @[1, 2]
-      doAssert toSeq(@[1, 2]) == @[1, 2]
-
-    block:
-      iterator myIter(seed: int): auto =
-        for i in 0..<seed:
-          yield i
-      doAssert toSeq(myIter(2)) == @[0, 1]
-
-    block:
-      iterator myIter(): auto {.inline.} =
-        yield 1
-        yield 2
-
-      doAssert myIter.toSeq == @[1, 2]
-      doAssert toSeq(myIter) == @[1, 2]
-
-    block:
-      iterator myIter(): int {.closure.} =
-        yield 1
-        yield 2
-
-      doAssert myIter.toSeq == @[1, 2]
-      doAssert toSeq(myIter) == @[1, 2]
-
-    block:
-      proc myIter(): auto =
-        iterator ret(): int {.closure.} =
-          yield 1
-          yield 2
-        result = ret
-
-      doAssert myIter().toSeq == @[1, 2]
-      doAssert toSeq(myIter()) == @[1, 2]
-
-    block:
-      proc myIter(n: int): auto =
-        var counter = 0
-        iterator ret(): int {.closure.} =
-          while counter < n:
-            yield counter
-            counter.inc
-        result = ret
-
-      block:
-        let myIter3 = myIter(3)
-        doAssert myIter3.toSeq == @[0, 1, 2]
-      block:
-        let myIter3 = myIter(3)
-        doAssert toSeq(myIter3) == @[0, 1, 2]
-      block:
-        # makes sure this does not hang forever
-        doAssert myIter(3).toSeq == @[0, 1, 2]
-        doAssert toSeq(myIter(3)) == @[0, 1, 2]
-
-  block:
-    # tests https://github.com/nim-lang/Nim/issues/7187
-    counter = 0
-    let ret = toSeq(@[1, 2, 3].identity().filter(proc (x: int): bool = x < 3))
-    doAssert ret == @[1, 2]
-    doAssert counter == 1
-  block: # foldl tests
-    let
-      numbers = @[5, 9, 11]
-      addition = foldl(numbers, a + b)
-      subtraction = foldl(numbers, a - b)
-      multiplication = foldl(numbers, a * b)
-      words = @["nim", "is", "cool"]
-      concatenation = foldl(words, a & b)
-    assert addition == 25, "Addition is (((5)+9)+11)"
-    assert subtraction == -15, "Subtraction is (((5)-9)-11)"
-    assert multiplication == 495, "Multiplication is (((5)*9)*11)"
-    assert concatenation == "nimiscool"
-
-  block: # foldr tests
-    let
-      numbers = @[5, 9, 11]
-      addition = foldr(numbers, a + b)
-      subtraction = foldr(numbers, a - b)
-      multiplication = foldr(numbers, a * b)
-      words = @["nim", "is", "cool"]
-      concatenation = foldr(words, a & b)
-    assert addition == 25, "Addition is (5+(9+(11)))"
-    assert subtraction == 7, "Subtraction is (5-(9-(11)))"
-    assert multiplication == 495, "Multiplication is (5*(9*(11)))"
-    assert concatenation == "nimiscool"
-    doAssert toSeq(1..3).foldr(a + b) == 6 # issue #14404
-
-  block: # mapIt + applyIt test
-    counter = 0
-    var
-      nums = @[1, 2, 3, 4]
-      strings = nums.identity.mapIt($(4 * it))
-    doAssert counter == 1
-    nums.applyIt(it * 3)
-    assert nums[0] + nums[3] == 15
-    assert strings[2] == "12"
-
-  block: # newSeqWith tests
-    var seq2D = newSeqWith(4, newSeq[bool](2))
-    seq2D[0][0] = true
-    seq2D[1][0] = true
-    seq2D[0][1] = true
-    doAssert seq2D == @[@[true, true], @[true, false], @[false, false], @[false, false]]
-
-  block: # mapLiterals tests
-    let x = mapLiterals([0.1, 1.2, 2.3, 3.4], int)
-    doAssert x is array[4, int]
-    doAssert mapLiterals((1, ("abc"), 2), float, nested = false) ==
-      (float(1), "abc", float(2))
-    doAssert mapLiterals(([1], ("abc"), 2), `$`, nested = true) ==
-      (["1"], "abc", "2")
-
-  block: # mapIt with openArray
-    counter = 0
-    proc foo(x: openArray[int]): seq[int] = x.mapIt(it * 10)
-    doAssert foo([identity(1), identity(2)]) == @[10, 20]
-    doAssert counter == 2
-
-  block: # mapIt with direct openArray
-    proc foo1(x: openArray[int]): seq[int] = x.mapIt(it * 10)
-    counter = 0
-    doAssert foo1(openArray[int]([identity(1), identity(2)])) == @[10, 20]
-    doAssert counter == 2
-
-    # Corner cases (openArray literals should not be common)
-    template foo2(x: openArray[int]): seq[int] = x.mapIt(it * 10)
-    counter = 0
-    doAssert foo2(openArray[int]([identity(1), identity(2)])) == @[10, 20]
-    # TODO: this fails; not sure how to fix this case
-    # doAssert counter == 2
-
-    counter = 0
-    doAssert openArray[int]([identity(1), identity(2)]).mapIt(it) == @[1, 2]
-    # ditto
-    # doAssert counter == 2
-
-  block: # mapIt empty test, see https://github.com/nim-lang/Nim/pull/8584#pullrequestreview-144723468
-    # NOTE: `[].mapIt(it)` is illegal, just as `let a = @[]` is (lacks type
-    # of elements)
-    doAssert: not compiles(mapIt(@[], it))
-    doAssert: not compiles(mapIt([], it))
-    doAssert newSeq[int](0).mapIt(it) == @[]
-
-  block: # mapIt redifinition check, see https://github.com/nim-lang/Nim/issues/8580
-    let s2 = [1, 2].mapIt(it)
-    doAssert s2 == @[1, 2]
-
-  block:
-    counter = 0
-    doAssert [1, 2].identity().mapIt(it*2).mapIt(it*10) == @[20, 40]
-    # https://github.com/nim-lang/Nim/issues/7187 test case
-    doAssert counter == 1
-
-  block: # mapIt with invalid RHS for `let` (#8566)
-    type X = enum
-      A, B
-    doAssert mapIt(X, $it) == @["A", "B"]
-
-  block:
-    # bug #9093
-    let inp = "a:b,c:d"
-
-    let outp = inp.split(",").mapIt(it.split(":"))
-    doAssert outp == @[@["a", "b"], @["c", "d"]]
-
-
-  block:
-    proc iter(len: int): auto =
-      result = iterator(): int =
-        for i in 0..<len:
-          yield i
-
-    doAssert: iter(3).mapIt(2*it).foldl(a + b) == 6
-
-  when not defined(testing):
-    echo "Finished doc tests"

lib/pure/json.nim

@@ -969,7 +969,8 @@ template verifyJsonKind(node: JsonNode, kinds: set[JsonNodeKind],
 
 when defined(nimFixedForwardGeneric):
 
-  macro isRefSkipDistinct(arg: typed): untyped =
+  macro isRefSkipDistinct*(arg: typed): untyped =
+    ## internal only, do not use
     var impl = getTypeImpl(arg)
     if impl.kind == nnkBracketExpr and impl[0].eqIdent("typeDesc"):
       impl = getTypeImpl(impl[1])
@@ -1286,235 +1287,3 @@ when false:
 
 # { "json": 5 }
 # To get that we shall use, obj["json"]
-
-when isMainModule:
-  # Note: Macro tests are in tests/stdlib/tjsonmacro.nim
-
-  let testJson = parseJson"""{ "a": [1, 2, 3, 4], "b": "asd", "c": "\ud83c\udf83", "d": "\u00E6"}"""
-  # nil passthrough
-  doAssert(testJson{"doesnt_exist"}{"anything"}.isNil)
-  testJson{["e", "f"]} = %true
-  doAssert(testJson["e"]["f"].bval)
-
-  # make sure UTF-16 decoding works.
-  doAssert(testJson["c"].str == "🎃")
-  doAssert(testJson["d"].str == "æ")
-
-  # make sure no memory leek when parsing invalid string
-  let startMemory = getOccupiedMem()
-  for i in 0 .. 10000:
-    try:
-      discard parseJson"""{ invalid"""
-    except:
-      discard
-  # memory diff should less than 4M
-  doAssert(abs(getOccupiedMem() - startMemory) < 4 * 1024 * 1024)
-
-
-  # test `$`
-  let stringified = $testJson
-  let parsedAgain = parseJson(stringified)
-  doAssert(parsedAgain["b"].str == "asd")
-
-  parsedAgain["abc"] = %5
-  doAssert parsedAgain["abc"].num == 5
-
-  # Bounds checking
-  when compileOption("boundChecks"):
-    try:
-      let a = testJson["a"][9]
-      doAssert(false, "IndexDefect not thrown")
-    except IndexDefect:
-      discard
-    try:
-      let a = testJson["a"][-1]
-      doAssert(false, "IndexDefect not thrown")
-    except IndexDefect:
-      discard
-    try:
-      doAssert(testJson["a"][0].num == 1, "Index doesn't correspond to its value")
-    except:
-      doAssert(false, "IndexDefect thrown for valid index")
-
-  doAssert(testJson{"b"}.getStr() == "asd", "Couldn't fetch a singly nested key with {}")
-  doAssert(isNil(testJson{"nonexistent"}), "Non-existent keys should return nil")
-  doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
-  doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
-  doAssert(testJson{"a"} == parseJson"[1, 2, 3, 4]", "Didn't return a non-JObject when there was one to be found")
-  doAssert(isNil(parseJson("[1, 2, 3]"){"foo"}), "Indexing directly into a list should return nil")
-
-  # Generator:
-  var j = %* [{"name": "John", "age": 30}, {"name": "Susan", "age": 31}]
-  doAssert j == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
-
-  var j2 = %*
-    [
-      {
-        "name": "John",
-        "age": 30
-      },
-      {
-        "name": "Susan",
-        "age": 31
-      }
-    ]
-  doAssert j2 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
-
-  var name = "John"
-  let herAge = 30
-  const hisAge = 31
-
-  var j3 = %*
-    [ {"name": "John"
-      , "age": herAge
-      }
-    , {"name": "Susan"
-      , "age": hisAge
-      }
-    ]
-  doAssert j3 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
-
-  var j4 = %*{"test": nil}
-  doAssert j4 == %{"test": newJNull()}
-
-  let seqOfNodes = @[%1, %2]
-  let jSeqOfNodes = %seqOfNodes
-  doAssert(jSeqOfNodes[1].num == 2)
-
-  type MyObj = object
-    a, b: int
-    s: string
-    f32: float32
-    f64: float64
-    next: ref MyObj
-  var m: MyObj
-  m.s = "hi"
-  m.a = 5
-  let jMyObj = %m
-  doAssert(jMyObj["a"].num == 5)
-  doAssert(jMyObj["s"].str == "hi")
-
-  # Test loading of file.
-  when not defined(js):
-    var parsed = parseFile("tests/testdata/jsontest.json")
-
-    try:
-      discard parsed["key2"][12123]
-      doAssert(false)
-    except IndexDefect: doAssert(true)
-
-    var parsed2 = parseFile("tests/testdata/jsontest2.json")
-    doAssert(parsed2{"repository", "description"}.str ==
-        "IRC Library for Haskell", "Couldn't fetch via multiply nested key using {}")
-
-  doAssert escapeJsonUnquoted("\10Foo🎃barÄ") == "\\nFoo🎃barÄ"
-  doAssert escapeJsonUnquoted("\0\7\20") == "\\u0000\\u0007\\u0014" # for #7887
-  doAssert escapeJson("\10Foo🎃barÄ") == "\"\\nFoo🎃barÄ\""
-  doAssert escapeJson("\0\7\20") == "\"\\u0000\\u0007\\u0014\"" # for #7887
-
-  # Test with extra data
-  when not defined(js):
-    try:
-      discard parseJson("123 456")
-      doAssert(false)
-    except JsonParsingError:
-      doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])
-
-    try:
-      discard parseFile("tests/testdata/jsonwithextradata.json")
-      doAssert(false)
-    except JsonParsingError:
-      doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])
-
-  # bug #6438
-  doAssert($ %*[] == "[]")
-  doAssert($ %*{} == "{}")
-
-  doAssert(not compiles(%{"error": "No messages"}))
-
-  # bug #9111
-  block:
-    type
-      Bar = string
-      Foo = object
-        a: int
-        b: Bar
-
-    let
-      js = """{"a": 123, "b": "abc"}""".parseJson
-      foo = js.to Foo
-
-    doAssert(foo.b == "abc")
-
-  # Generate constructors for range[T] types
-  block:
-    type
-      Q1 = range[0'u8 .. 50'u8]
-      Q2 = range[0'u16 .. 50'u16]
-      Q3 = range[0'u32 .. 50'u32]
-      Q4 = range[0'i8 .. 50'i8]
-      Q5 = range[0'i16 .. 50'i16]
-      Q6 = range[0'i32 .. 50'i32]
-      Q7 = range[0'f32 .. 50'f32]
-      Q8 = range[0'f64 .. 50'f64]
-      Q9 = range[0 .. 50]
-
-      X = object
-        m1: Q1
-        m2: Q2
-        m3: Q3
-        m4: Q4
-        m5: Q5
-        m6: Q6
-        m7: Q7
-        m8: Q8
-        m9: Q9
-
-    let obj = X(
-      m1: Q1(42),
-      m2: Q2(42),
-      m3: Q3(42),
-      m4: Q4(42),
-      m5: Q5(42),
-      m6: Q6(42),
-      m7: Q7(42),
-      m8: Q8(42),
-      m9: Q9(42)
-    )
-
-    doAssert(obj == to(%obj, type(obj)))
-
-    when not defined(js):
-      const fragments = """[1,2,3] {"hi":3} 12 [] """
-      var res = ""
-      for x in parseJsonFragments(newStringStream(fragments)):
-        res.add($x)
-        res.add " "
-      doAssert res == fragments
-
-
-  # test isRefSkipDistinct
-  type
-    MyRef = ref object
-    MyObject = object
-    MyDistinct = distinct MyRef
-    MyOtherDistinct = distinct MyRef
-
-  var x0: ref int
-  var x1: MyRef
-  var x2: MyObject
-  var x3: MyDistinct
-  var x4: MyOtherDistinct
-
-  doAssert isRefSkipDistinct(x0)
-  doAssert isRefSkipDistinct(x1)
-  doAssert not isRefSkipDistinct(x2)
-  doAssert isRefSkipDistinct(x3)
-  doAssert isRefSkipDistinct(x4)
-
-
-  doAssert isRefSkipDistinct(ref int)
-  doAssert isRefSkipDistinct(MyRef)
-  doAssert not isRefSkipDistinct(MyObject)
-  doAssert isRefSkipDistinct(MyDistinct)
-  doAssert isRefSkipDistinct(MyOtherDistinct)

lib/pure/os.nim

@@ -3284,66 +3284,3 @@ func isValidFilename*(filename: string, maxLen = 259.Positive): bool {.since: (1
     find(f.name, invalidFilenameChars) != -1): return false
   for invalid in invalidFilenames:
     if cmpIgnoreCase(f.name, invalid) == 0: return false
-
-
-when isMainModule:
-  assert quoteShellWindows("aaa") == "aaa"
-  assert quoteShellWindows("aaa\"") == "aaa\\\""
-  assert quoteShellWindows("") == "\"\""
-
-  assert quoteShellPosix("aaa") == "aaa"
-  assert quoteShellPosix("aaa a") == "'aaa a'"
-  assert quoteShellPosix("") == "''"
-  assert quoteShellPosix("a'a") == "'a'\"'\"'a'"
-
-  when defined(posix):
-    assert quoteShell("") == "''"
-
-  block normalizePathEndTest:
-    # handle edge cases correctly: shouldn't affect whether path is
-    # absolute/relative
-    doAssert "".normalizePathEnd(true) == ""
-    doAssert "".normalizePathEnd(false) == ""
-    doAssert "/".normalizePathEnd(true) == $DirSep
-    doAssert "/".normalizePathEnd(false) == $DirSep
-
-    when defined(posix):
-      doAssert "//".normalizePathEnd(false) == "/"
-      doAssert "foo.bar//".normalizePathEnd == "foo.bar"
-      doAssert "bar//".normalizePathEnd(trailingSep = true) == "bar/"
-    when defined(Windows):
-      doAssert r"C:\foo\\".normalizePathEnd == r"C:\foo"
-      doAssert r"C:\foo".normalizePathEnd(trailingSep = true) == r"C:\foo\"
-      # this one is controversial: we could argue for returning `D:\` instead,
-      # but this is simplest.
-      doAssert r"D:\".normalizePathEnd == r"D:"
-      doAssert r"E:/".normalizePathEnd(trailingSep = true) == r"E:\"
-      doAssert "/".normalizePathEnd == r"\"
-
-
-  block isValidFilenameTest:
-    # Negative Tests.
-    doAssert not isValidFilename("abcd", maxLen = 2)
-    doAssert not isValidFilename("0123456789", maxLen = 8)
-    doAssert not isValidFilename("con")
-    doAssert not isValidFilename("aux")
-    doAssert not isValidFilename("prn")
-    doAssert not isValidFilename("OwO|UwU")
-    doAssert not isValidFilename(" foo")
-    doAssert not isValidFilename("foo ")
-    doAssert not isValidFilename("foo.")
-    doAssert not isValidFilename("con.txt")
-    doAssert not isValidFilename("aux.bat")
-    doAssert not isValidFilename("prn.exe")
-    doAssert not isValidFilename("nim>.nim")
-    doAssert not isValidFilename(" foo.log")
-    # Positive Tests.
-    doAssert isValidFilename("abcd", maxLen = 42.Positive)
-    doAssert isValidFilename("c0n")
-    doAssert isValidFilename("foo.aux")
-    doAssert isValidFilename("bar.prn")
-    doAssert isValidFilename("OwO_UwU")
-    doAssert isValidFilename("cron")
-    doAssert isValidFilename("ux.bat")
-    doAssert isValidFilename("nim.nim")
-    doAssert isValidFilename("foo.log")

tests/stdlib/tjson.nim

@@ -0,0 +1,234 @@
+#[
+Note: Macro tests are in tests/stdlib/tjsonmacro.nim
+]#
+
+import std/[json,parsejson,strutils,streams]
+
+let testJson = parseJson"""{ "a": [1, 2, 3, 4], "b": "asd", "c": "\ud83c\udf83", "d": "\u00E6"}"""
+# nil passthrough
+doAssert(testJson{"doesnt_exist"}{"anything"}.isNil)
+testJson{["e", "f"]} = %true
+doAssert(testJson["e"]["f"].bval)
+
+# make sure UTF-16 decoding works.
+doAssert(testJson["c"].str == "🎃")
+doAssert(testJson["d"].str == "æ")
+
+# make sure no memory leek when parsing invalid string
+let startMemory = getOccupiedMem()
+for i in 0 .. 10000:
+  try:
+    discard parseJson"""{ invalid"""
+  except:
+    discard
+# memory diff should less than 4M
+doAssert(abs(getOccupiedMem() - startMemory) < 4 * 1024 * 1024)
+
+
+# test `$`
+let stringified = $testJson
+let parsedAgain = parseJson(stringified)
+doAssert(parsedAgain["b"].str == "asd")
+
+parsedAgain["abc"] = %5
+doAssert parsedAgain["abc"].num == 5
+
+# Bounds checking
+when compileOption("boundChecks"):
+  try:
+    let a = testJson["a"][9]
+    doAssert(false, "IndexDefect not thrown")
+  except IndexDefect:
+    discard
+  try:
+    let a = testJson["a"][-1]
+    doAssert(false, "IndexDefect not thrown")
+  except IndexDefect:
+    discard
+  try:
+    doAssert(testJson["a"][0].num == 1, "Index doesn't correspond to its value")
+  except:
+    doAssert(false, "IndexDefect thrown for valid index")
+
+doAssert(testJson{"b"}.getStr() == "asd", "Couldn't fetch a singly nested key with {}")
+doAssert(isNil(testJson{"nonexistent"}), "Non-existent keys should return nil")
+doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
+doAssert(isNil(testJson{"a", "b"}), "Indexing through a list should return nil")
+doAssert(testJson{"a"} == parseJson"[1, 2, 3, 4]", "Didn't return a non-JObject when there was one to be found")
+doAssert(isNil(parseJson("[1, 2, 3]"){"foo"}), "Indexing directly into a list should return nil")
+
+# Generator:
+var j = %* [{"name": "John", "age": 30}, {"name": "Susan", "age": 31}]
+doAssert j == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
+
+var j2 = %*
+  [
+    {
+      "name": "John",
+      "age": 30
+    },
+    {
+      "name": "Susan",
+      "age": 31
+    }
+  ]
+doAssert j2 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
+
+var name = "John"
+let herAge = 30
+const hisAge = 31
+
+var j3 = %*
+  [ {"name": "John"
+    , "age": herAge
+    }
+  , {"name": "Susan"
+    , "age": hisAge
+    }
+  ]
+doAssert j3 == %[%{"name": %"John", "age": %30}, %{"name": %"Susan", "age": %31}]
+
+var j4 = %*{"test": nil}
+doAssert j4 == %{"test": newJNull()}
+
+let seqOfNodes = @[%1, %2]
+let jSeqOfNodes = %seqOfNodes
+doAssert(jSeqOfNodes[1].num == 2)
+
+type MyObj = object
+  a, b: int
+  s: string
+  f32: float32
+  f64: float64
+  next: ref MyObj
+var m: MyObj
+m.s = "hi"
+m.a = 5
+let jMyObj = %m
+doAssert(jMyObj["a"].num == 5)
+doAssert(jMyObj["s"].str == "hi")
+
+# Test loading of file.
+when not defined(js):
+  var parsed = parseFile("tests/testdata/jsontest.json")
+
+  try:
+    discard parsed["key2"][12123]
+    doAssert(false)
+  except IndexDefect: doAssert(true)
+
+  var parsed2 = parseFile("tests/testdata/jsontest2.json")
+  doAssert(parsed2{"repository", "description"}.str ==
+      "IRC Library for Haskell", "Couldn't fetch via multiply nested key using {}")
+
+doAssert escapeJsonUnquoted("\10Foo🎃barÄ") == "\\nFoo🎃barÄ"
+doAssert escapeJsonUnquoted("\0\7\20") == "\\u0000\\u0007\\u0014" # for #7887
+doAssert escapeJson("\10Foo🎃barÄ") == "\"\\nFoo🎃barÄ\""
+doAssert escapeJson("\0\7\20") == "\"\\u0000\\u0007\\u0014\"" # for #7887
+
+# Test with extra data
+when not defined(js):
+  try:
+    discard parseJson("123 456")
+    doAssert(false)
+  except JsonParsingError:
+    doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])
+
+  try:
+    discard parseFile("tests/testdata/jsonwithextradata.json")
+    doAssert(false)
+  except JsonParsingError:
+    doAssert getCurrentExceptionMsg().contains(errorMessages[errEofExpected])
+
+# bug #6438
+doAssert($ %*[] == "[]")
+doAssert($ %*{} == "{}")
+
+doAssert(not compiles(%{"error": "No messages"}))
+
+# bug #9111
+block:
+  type
+    Bar = string
+    Foo = object
+      a: int
+      b: Bar
+
+  let
+    js = """{"a": 123, "b": "abc"}""".parseJson
+    foo = js.to Foo
+
+  doAssert(foo.b == "abc")
+
+# Generate constructors for range[T] types
+block:
+  type
+    Q1 = range[0'u8 .. 50'u8]
+    Q2 = range[0'u16 .. 50'u16]
+    Q3 = range[0'u32 .. 50'u32]
+    Q4 = range[0'i8 .. 50'i8]
+    Q5 = range[0'i16 .. 50'i16]
+    Q6 = range[0'i32 .. 50'i32]
+    Q7 = range[0'f32 .. 50'f32]
+    Q8 = range[0'f64 .. 50'f64]
+    Q9 = range[0 .. 50]
+
+    X = object
+      m1: Q1
+      m2: Q2
+      m3: Q3
+      m4: Q4
+      m5: Q5
+      m6: Q6
+      m7: Q7
+      m8: Q8
+      m9: Q9
+
+  let obj = X(
+    m1: Q1(42),
+    m2: Q2(42),
+    m3: Q3(42),
+    m4: Q4(42),
+    m5: Q5(42),
+    m6: Q6(42),
+    m7: Q7(42),
+    m8: Q8(42),
+    m9: Q9(42)
+  )
+
+  doAssert(obj == to(%obj, type(obj)))
+
+  when not defined(js):
+    const fragments = """[1,2,3] {"hi":3} 12 [] """
+    var res = ""
+    for x in parseJsonFragments(newStringStream(fragments)):
+      res.add($x)
+      res.add " "
+    doAssert res == fragments
+
+
+# test isRefSkipDistinct
+type
+  MyRef = ref object
+  MyObject = object
+  MyDistinct = distinct MyRef
+  MyOtherDistinct = distinct MyRef
+
+var x0: ref int
+var x1: MyRef
+var x2: MyObject
+var x3: MyDistinct
+var x4: MyOtherDistinct
+
+doAssert isRefSkipDistinct(x0)
+doAssert isRefSkipDistinct(x1)
+doAssert not isRefSkipDistinct(x2)
+doAssert isRefSkipDistinct(x3)
+doAssert isRefSkipDistinct(x4)
+
+
+doAssert isRefSkipDistinct(ref int)
+doAssert isRefSkipDistinct(MyRef)
+doAssert not isRefSkipDistinct(MyObject)
+doAssert isRefSkipDistinct(MyDistinct)
+doAssert isRefSkipDistinct(MyOtherDistinct)

tests/stdlib/tos.nim

@@ -447,3 +447,66 @@ block isRelativeTo:
   doAssert isRelativeTo("foo/bar", ".")
   doAssert not isRelativeTo("foo/bar.nims", "foo/bar.nim")
   doAssert not isRelativeTo("/foo2", "/foo")
+
+block: # quoteShellWindows
+  assert quoteShellWindows("aaa") == "aaa"
+  assert quoteShellWindows("aaa\"") == "aaa\\\""
+  assert quoteShellWindows("") == "\"\""
+
+block: # quoteShellWindows
+  assert quoteShellPosix("aaa") == "aaa"
+  assert quoteShellPosix("aaa a") == "'aaa a'"
+  assert quoteShellPosix("") == "''"
+  assert quoteShellPosix("a'a") == "'a'\"'\"'a'"
+
+block: # quoteShell
+  when defined(posix):
+    assert quoteShell("") == "''"
+
+block: # normalizePathEnd
+  # handle edge cases correctly: shouldn't affect whether path is
+  # absolute/relative
+  doAssert "".normalizePathEnd(true) == ""
+  doAssert "".normalizePathEnd(false) == ""
+  doAssert "/".normalizePathEnd(true) == $DirSep
+  doAssert "/".normalizePathEnd(false) == $DirSep
+
+  when defined(posix):
+    doAssert "//".normalizePathEnd(false) == "/"
+    doAssert "foo.bar//".normalizePathEnd == "foo.bar"
+    doAssert "bar//".normalizePathEnd(trailingSep = true) == "bar/"
+  when defined(Windows):
+    doAssert r"C:\foo\\".normalizePathEnd == r"C:\foo"
+    doAssert r"C:\foo".normalizePathEnd(trailingSep = true) == r"C:\foo\"
+    # this one is controversial: we could argue for returning `D:\` instead,
+    # but this is simplest.
+    doAssert r"D:\".normalizePathEnd == r"D:"
+    doAssert r"E:/".normalizePathEnd(trailingSep = true) == r"E:\"
+    doAssert "/".normalizePathEnd == r"\"
+
+block: # isValidFilename
+  # Negative Tests.
+  doAssert not isValidFilename("abcd", maxLen = 2)
+  doAssert not isValidFilename("0123456789", maxLen = 8)
+  doAssert not isValidFilename("con")
+  doAssert not isValidFilename("aux")
+  doAssert not isValidFilename("prn")
+  doAssert not isValidFilename("OwO|UwU")
+  doAssert not isValidFilename(" foo")
+  doAssert not isValidFilename("foo ")
+  doAssert not isValidFilename("foo.")
+  doAssert not isValidFilename("con.txt")
+  doAssert not isValidFilename("aux.bat")
+  doAssert not isValidFilename("prn.exe")
+  doAssert not isValidFilename("nim>.nim")
+  doAssert not isValidFilename(" foo.log")
+  # Positive Tests.
+  doAssert isValidFilename("abcd", maxLen = 42.Positive)
+  doAssert isValidFilename("c0n")
+  doAssert isValidFilename("foo.aux")
+  doAssert isValidFilename("bar.prn")
+  doAssert isValidFilename("OwO_UwU")
+  doAssert isValidFilename("cron")
+  doAssert isValidFilename("ux.bat")
+  doAssert isValidFilename("nim.nim")
+  doAssert isValidFilename("foo.log")

tests/stdlib/tsequtils.nim

@@ -0,0 +1,460 @@
+import std/sequtils
+import strutils
+from algorithm import sorted
+
+# helper for testing double substitution side effects which are handled
+# by `evalOnceAs`
+var counter = 0
+proc identity[T](a: T): auto =
+  counter.inc
+  a
+
+block: # concat test
+  let
+    s1 = @[1, 2, 3]
+    s2 = @[4, 5]
+    s3 = @[6, 7]
+    total = concat(s1, s2, s3)
+  assert total == @[1, 2, 3, 4, 5, 6, 7]
+
+block: # count test
+  let
+    s1 = @[1, 2, 3, 2]
+    s2 = @['a', 'b', 'x', 'a']
+    a1 = [1, 2, 3, 2]
+    a2 = ['a', 'b', 'x', 'a']
+    r0 = count(s1, 0)
+    r1 = count(s1, 1)
+    r2 = count(s1, 2)
+    r3 = count(s2, 'y')
+    r4 = count(s2, 'x')
+    r5 = count(s2, 'a')
+    ar0 = count(a1, 0)
+    ar1 = count(a1, 1)
+    ar2 = count(a1, 2)
+    ar3 = count(a2, 'y')
+    ar4 = count(a2, 'x')
+    ar5 = count(a2, 'a')
+  assert r0 == 0
+  assert r1 == 1
+  assert r2 == 2
+  assert r3 == 0
+  assert r4 == 1
+  assert r5 == 2
+  assert ar0 == 0
+  assert ar1 == 1
+  assert ar2 == 2
+  assert ar3 == 0
+  assert ar4 == 1
+  assert ar5 == 2
+
+block: # cycle tests
+  let
+    a = @[1, 2, 3]
+    b: seq[int] = @[]
+    c = [1, 2, 3]
+
+  doAssert a.cycle(3) == @[1, 2, 3, 1, 2, 3, 1, 2, 3]
+  doAssert a.cycle(0) == @[]
+  #doAssert a.cycle(-1) == @[] # will not compile!
+  doAssert b.cycle(3) == @[]
+  doAssert c.cycle(3) == @[1, 2, 3, 1, 2, 3, 1, 2, 3]
+  doAssert c.cycle(0) == @[]
+
+block: # repeat tests
+  assert repeat(10, 5) == @[10, 10, 10, 10, 10]
+  assert repeat(@[1, 2, 3], 2) == @[@[1, 2, 3], @[1, 2, 3]]
+  assert repeat([1, 2, 3], 2) == @[[1, 2, 3], [1, 2, 3]]
+
+block: # deduplicates test
+  let
+    dup1 = @[1, 1, 3, 4, 2, 2, 8, 1, 4]
+    dup2 = @["a", "a", "c", "d", "d"]
+    dup3 = [1, 1, 3, 4, 2, 2, 8, 1, 4]
+    dup4 = ["a", "a", "c", "d", "d"]
+    unique1 = deduplicate(dup1)
+    unique2 = deduplicate(dup2)
+    unique3 = deduplicate(dup3)
+    unique4 = deduplicate(dup4)
+    unique5 = deduplicate(dup1.sorted, true)
+    unique6 = deduplicate(dup2, true)
+    unique7 = deduplicate(dup3.sorted, true)
+    unique8 = deduplicate(dup4, true)
+  assert unique1 == @[1, 3, 4, 2, 8]
+  assert unique2 == @["a", "c", "d"]
+  assert unique3 == @[1, 3, 4, 2, 8]
+  assert unique4 == @["a", "c", "d"]
+  assert unique5 == @[1, 2, 3, 4, 8]
+  assert unique6 == @["a", "c", "d"]
+  assert unique7 == @[1, 2, 3, 4, 8]
+  assert unique8 == @["a", "c", "d"]
+
+block: # zip test
+  let
+    short = @[1, 2, 3]
+    long = @[6, 5, 4, 3, 2, 1]
+    words = @["one", "two", "three"]
+    ashort = [1, 2, 3]
+    along = [6, 5, 4, 3, 2, 1]
+    awords = ["one", "two", "three"]
+    zip1 = zip(short, long)
+    zip2 = zip(short, words)
+    zip3 = zip(ashort, along)
+  assert zip1 == @[(1, 6), (2, 5), (3, 4)]
+  assert zip2 == @[(1, "one"), (2, "two"), (3, "three")]
+  assert zip3 == @[(1, 6), (2, 5), (3, 4)]
+  assert zip1[2][1] == 4
+  assert zip2[2][1] == "three"
+  assert zip3[2][1] == 4
+  when (NimMajor, NimMinor) <= (1, 0):
+    let
+      # In Nim 1.0.x and older, zip returned a seq of tuple strictly
+      # with fields named "a" and "b".
+      zipAb = zip(ashort, awords)
+    assert zipAb == @[(a: 1, b: "one"), (2, "two"), (3, "three")]
+    assert zipAb[2].b == "three"
+  else:
+    let
+      # As zip returns seq of anonymous tuples, they can be assigned
+      # to any variable that's a sequence of named tuples too.
+      zipXy: seq[tuple[x: int, y: string]] = zip(ashort, awords)
+      zipMn: seq[tuple[m: int, n: string]] = zip(ashort, words)
+    assert zipXy == @[(x: 1, y: "one"), (2, "two"), (3, "three")]
+    assert zipMn == @[(m: 1, n: "one"), (2, "two"), (3, "three")]
+    assert zipXy[2].y == "three"
+    assert zipMn[2].n == "three"
+
+block: # distribute tests
+  let numbers = @[1, 2, 3, 4, 5, 6, 7]
+  doAssert numbers.distribute(3) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
+  doAssert numbers.distribute(6)[0] == @[1, 2]
+  doAssert numbers.distribute(6)[5] == @[7]
+  let a = @[1, 2, 3, 4, 5, 6, 7]
+  doAssert a.distribute(1, true) == @[@[1, 2, 3, 4, 5, 6, 7]]
+  doAssert a.distribute(1, false) == @[@[1, 2, 3, 4, 5, 6, 7]]
+  doAssert a.distribute(2, true) == @[@[1, 2, 3, 4], @[5, 6, 7]]
+  doAssert a.distribute(2, false) == @[@[1, 2, 3, 4], @[5, 6, 7]]
+  doAssert a.distribute(3, true) == @[@[1, 2, 3], @[4, 5], @[6, 7]]
+  doAssert a.distribute(3, false) == @[@[1, 2, 3], @[4, 5, 6], @[7]]
+  doAssert a.distribute(4, true) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
+  doAssert a.distribute(4, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7]]
+  doAssert a.distribute(5, true) == @[@[1, 2], @[3, 4], @[5], @[6], @[7]]
+  doAssert a.distribute(5, false) == @[@[1, 2], @[3, 4], @[5, 6], @[7], @[]]
+  doAssert a.distribute(6, true) == @[@[1, 2], @[3], @[4], @[5], @[6], @[7]]
+  doAssert a.distribute(6, false) == @[
+    @[1, 2], @[3, 4], @[5, 6], @[7], @[], @[]]
+  doAssert a.distribute(8, false) == a.distribute(8, true)
+  doAssert a.distribute(90, false) == a.distribute(90, true)
+  var b = @[0]
+  for f in 1 .. 25: b.add(f)
+  doAssert b.distribute(5, true)[4].len == 5
+  doAssert b.distribute(5, false)[4].len == 2
+
+block: # map test
+  let
+    numbers = @[1, 4, 5, 8, 9, 7, 4]
+    anumbers = [1, 4, 5, 8, 9, 7, 4]
+    m1 = map(numbers, proc(x: int): int = 2*x)
+    m2 = map(anumbers, proc(x: int): int = 2*x)
+  assert m1 == @[2, 8, 10, 16, 18, 14, 8]
+  assert m2 == @[2, 8, 10, 16, 18, 14, 8]
+
+block: # apply test
+  var a = @["1", "2", "3", "4"]
+  apply(a, proc(x: var string) = x &= "42")
+  assert a == @["142", "242", "342", "442"]
+
+block: # filter proc test
+  let
+    colors = @["red", "yellow", "black"]
+    acolors = ["red", "yellow", "black"]
+    f1 = filter(colors, proc(x: string): bool = x.len < 6)
+    f2 = filter(colors) do (x: string) -> bool: x.len > 5
+    f3 = filter(acolors, proc(x: string): bool = x.len < 6)
+    f4 = filter(acolors) do (x: string) -> bool: x.len > 5
+  assert f1 == @["red", "black"]
+  assert f2 == @["yellow"]
+  assert f3 == @["red", "black"]
+  assert f4 == @["yellow"]
+
+block: # filter iterator test
+  let numbers = @[1, 4, 5, 8, 9, 7, 4]
+  let anumbers = [1, 4, 5, 8, 9, 7, 4]
+  assert toSeq(filter(numbers, proc (x: int): bool = x mod 2 == 0)) ==
+    @[4, 8, 4]
+  assert toSeq(filter(anumbers, proc (x: int): bool = x mod 2 == 0)) ==
+    @[4, 8, 4]
+
+block: # keepIf test
+  var floats = @[13.0, 12.5, 5.8, 2.0, 6.1, 9.9, 10.1]
+  keepIf(floats, proc(x: float): bool = x > 10)
+  assert floats == @[13.0, 12.5, 10.1]
+
+block: # delete tests
+  let outcome = @[1, 1, 1, 1, 1, 1, 1, 1]
+  var dest = @[1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
+  dest.delete(3, 8)
+  assert outcome == dest, """\
+  Deleting range 3-9 from [1,1,1,2,2,2,2,2,2,1,1,1,1,1]
+  is [1,1,1,1,1,1,1,1]"""
+  var x = @[1, 2, 3]
+  x.delete(100, 100)
+  assert x == @[1, 2, 3]
+
+block: # insert tests
+  var dest = @[1, 1, 1, 1, 1, 1, 1, 1]
+  let
+    src = @[2, 2, 2, 2, 2, 2]
+    outcome = @[1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
+  dest.insert(src, 3)
+  assert dest == outcome, """\
+  Inserting [2,2,2,2,2,2] into [1,1,1,1,1,1,1,1]
+  at 3 is [1,1,1,2,2,2,2,2,2,1,1,1,1,1]"""
+
+block: # filterIt test
+  let
+    temperatures = @[-272.15, -2.0, 24.5, 44.31, 99.9, -113.44]
+    acceptable = filterIt(temperatures, it < 50 and it > -10)
+    notAcceptable = filterIt(temperatures, it > 50 or it < -10)
+  assert acceptable == @[-2.0, 24.5, 44.31]
+  assert notAcceptable == @[-272.15, 99.9, -113.44]
+
+block: # keepItIf test
+  var candidates = @["foo", "bar", "baz", "foobar"]
+  keepItIf(candidates, it.len == 3 and it[0] == 'b')
+  assert candidates == @["bar", "baz"]
+
+block: # all
+  let
+    numbers = @[1, 4, 5, 8, 9, 7, 4]
+    anumbers = [1, 4, 5, 8, 9, 7, 4]
+    len0seq: seq[int] = @[]
+  assert all(numbers, proc (x: int): bool = return x < 10) == true
+  assert all(numbers, proc (x: int): bool = return x < 9) == false
+  assert all(len0seq, proc (x: int): bool = return false) == true
+  assert all(anumbers, proc (x: int): bool = return x < 10) == true
+  assert all(anumbers, proc (x: int): bool = return x < 9) == false
+
+block: # allIt
+  let
+    numbers = @[1, 4, 5, 8, 9, 7, 4]
+    anumbers = [1, 4, 5, 8, 9, 7, 4]
+    len0seq: seq[int] = @[]
+  assert allIt(numbers, it < 10) == true
+  assert allIt(numbers, it < 9) == false
+  assert allIt(len0seq, false) == true
+  assert allIt(anumbers, it < 10) == true
+  assert allIt(anumbers, it < 9) == false
+
+block: # any
+  let
+    numbers = @[1, 4, 5, 8, 9, 7, 4]
+    anumbers = [1, 4, 5, 8, 9, 7, 4]
+    len0seq: seq[int] = @[]
+  assert any(numbers, proc (x: int): bool = return x > 8) == true
+  assert any(numbers, proc (x: int): bool = return x > 9) == false
+  assert any(len0seq, proc (x: int): bool = return true) == false
+  assert any(anumbers, proc (x: int): bool = return x > 8) == true
+  assert any(anumbers, proc (x: int): bool = return x > 9) == false
+
+block: # anyIt
+  let
+    numbers = @[1, 4, 5, 8, 9, 7, 4]
+    anumbers = [1, 4, 5, 8, 9, 7, 4]
+    len0seq: seq[int] = @[]
+  assert anyIt(numbers, it > 8) == true
+  assert anyIt(numbers, it > 9) == false
+  assert anyIt(len0seq, true) == false
+  assert anyIt(anumbers, it > 8) == true
+  assert anyIt(anumbers, it > 9) == false
+
+block: # toSeq test
+  block:
+    let
+      numeric = @[1, 2, 3, 4, 5, 6, 7, 8, 9]
+      oddNumbers = toSeq(filter(numeric) do (x: int) -> bool:
+        if x mod 2 == 1:
+          result = true)
+    assert oddNumbers == @[1, 3, 5, 7, 9]
+
+  block:
+    doAssert [1, 2].toSeq == @[1, 2]
+    doAssert @[1, 2].toSeq == @[1, 2]
+
+    doAssert @[1, 2].toSeq == @[1, 2]
+    doAssert toSeq(@[1, 2]) == @[1, 2]
+
+  block:
+    iterator myIter(seed: int): auto =
+      for i in 0..<seed:
+        yield i
+    doAssert toSeq(myIter(2)) == @[0, 1]
+
+  block:
+    iterator myIter(): auto {.inline.} =
+      yield 1
+      yield 2
+
+    doAssert myIter.toSeq == @[1, 2]
+    doAssert toSeq(myIter) == @[1, 2]
+
+  block:
+    iterator myIter(): int {.closure.} =
+      yield 1
+      yield 2
+
+    doAssert myIter.toSeq == @[1, 2]
+    doAssert toSeq(myIter) == @[1, 2]
+
+  block:
+    proc myIter(): auto =
+      iterator ret(): int {.closure.} =
+        yield 1
+        yield 2
+      result = ret
+
+    doAssert myIter().toSeq == @[1, 2]
+    doAssert toSeq(myIter()) == @[1, 2]
+
+  block:
+    proc myIter(n: int): auto =
+      var counter = 0
+      iterator ret(): int {.closure.} =
+        while counter < n:
+          yield counter
+          counter.inc
+      result = ret
+
+    block:
+      let myIter3 = myIter(3)
+      doAssert myIter3.toSeq == @[0, 1, 2]
+    block:
+      let myIter3 = myIter(3)
+      doAssert toSeq(myIter3) == @[0, 1, 2]
+    block:
+      # makes sure this does not hang forever
+      doAssert myIter(3).toSeq == @[0, 1, 2]
+      doAssert toSeq(myIter(3)) == @[0, 1, 2]
+
+block:
+  # tests https://github.com/nim-lang/Nim/issues/7187
+  counter = 0
+  let ret = toSeq(@[1, 2, 3].identity().filter(proc (x: int): bool = x < 3))
+  doAssert ret == @[1, 2]
+  doAssert counter == 1
+block: # foldl tests
+  let
+    numbers = @[5, 9, 11]
+    addition = foldl(numbers, a + b)
+    subtraction = foldl(numbers, a - b)
+    multiplication = foldl(numbers, a * b)
+    words = @["nim", "is", "cool"]
+    concatenation = foldl(words, a & b)
+  assert addition == 25, "Addition is (((5)+9)+11)"
+  assert subtraction == -15, "Subtraction is (((5)-9)-11)"
+  assert multiplication == 495, "Multiplication is (((5)*9)*11)"
+  assert concatenation == "nimiscool"
+
+block: # foldr tests
+  let
+    numbers = @[5, 9, 11]
+    addition = foldr(numbers, a + b)
+    subtraction = foldr(numbers, a - b)
+    multiplication = foldr(numbers, a * b)
+    words = @["nim", "is", "cool"]
+    concatenation = foldr(words, a & b)
+  assert addition == 25, "Addition is (5+(9+(11)))"
+  assert subtraction == 7, "Subtraction is (5-(9-(11)))"
+  assert multiplication == 495, "Multiplication is (5*(9*(11)))"
+  assert concatenation == "nimiscool"
+  doAssert toSeq(1..3).foldr(a + b) == 6 # issue #14404
+
+block: # mapIt + applyIt test
+  counter = 0
+  var
+    nums = @[1, 2, 3, 4]
+    strings = nums.identity.mapIt($(4 * it))
+  doAssert counter == 1
+  nums.applyIt(it * 3)
+  assert nums[0] + nums[3] == 15
+  assert strings[2] == "12"
+
+block: # newSeqWith tests
+  var seq2D = newSeqWith(4, newSeq[bool](2))
+  seq2D[0][0] = true
+  seq2D[1][0] = true
+  seq2D[0][1] = true
+  doAssert seq2D == @[@[true, true], @[true, false], @[false, false], @[false, false]]
+
+block: # mapLiterals tests
+  let x = mapLiterals([0.1, 1.2, 2.3, 3.4], int)
+  doAssert x is array[4, int]
+  doAssert mapLiterals((1, ("abc"), 2), float, nested = false) ==
+    (float(1), "abc", float(2))
+  doAssert mapLiterals(([1], ("abc"), 2), `$`, nested = true) ==
+    (["1"], "abc", "2")
+
+block: # mapIt with openArray
+  counter = 0
+  proc foo(x: openArray[int]): seq[int] = x.mapIt(it * 10)
+  doAssert foo([identity(1), identity(2)]) == @[10, 20]
+  doAssert counter == 2
+
+block: # mapIt with direct openArray
+  proc foo1(x: openArray[int]): seq[int] = x.mapIt(it * 10)
+  counter = 0
+  doAssert foo1(openArray[int]([identity(1), identity(2)])) == @[10, 20]
+  doAssert counter == 2
+
+  # Corner cases (openArray literals should not be common)
+  template foo2(x: openArray[int]): seq[int] = x.mapIt(it * 10)
+  counter = 0
+  doAssert foo2(openArray[int]([identity(1), identity(2)])) == @[10, 20]
+  # TODO: this fails; not sure how to fix this case
+  # doAssert counter == 2
+
+  counter = 0
+  doAssert openArray[int]([identity(1), identity(2)]).mapIt(it) == @[1, 2]
+  # ditto
+  # doAssert counter == 2
+
+block: # mapIt empty test, see https://github.com/nim-lang/Nim/pull/8584#pullrequestreview-144723468
+  # NOTE: `[].mapIt(it)` is illegal, just as `let a = @[]` is (lacks type
+  # of elements)
+  doAssert: not compiles(mapIt(@[], it))
+  doAssert: not compiles(mapIt([], it))
+  doAssert newSeq[int](0).mapIt(it) == @[]
+
+block: # mapIt redifinition check, see https://github.com/nim-lang/Nim/issues/8580
+  let s2 = [1, 2].mapIt(it)
+  doAssert s2 == @[1, 2]
+
+block:
+  counter = 0
+  doAssert [1, 2].identity().mapIt(it*2).mapIt(it*10) == @[20, 40]
+  # https://github.com/nim-lang/Nim/issues/7187 test case
+  doAssert counter == 1
+
+block: # mapIt with invalid RHS for `let` (#8566)
+  type X = enum
+    A, B
+  doAssert mapIt(X, $it) == @["A", "B"]
+
+block:
+  # bug #9093
+  let inp = "a:b,c:d"
+
+  let outp = inp.split(",").mapIt(it.split(":"))
+  doAssert outp == @[@["a", "b"], @["c", "d"]]
+
+
+block:
+  proc iter(len: int): auto =
+    result = iterator(): int =
+      for i in 0..<len:
+        yield i
+
+  doAssert: iter(3).mapIt(2*it).foldl(a + b) == 6
+
+when not defined(testing):
+  echo "Finished doc tests"