assertEqual "numerator" (numerator (13 / 21)) 13

assertEqual "denominator" (denominator (13 / 21)) 21

assertEqual "modulo" (modulo (-21) 13) 5

assertEqual "quotient" (quotient (-21) 13) (-1)

assertEqual "remainder" (remainder (-21) 13) (-8)

assertEqual "neg" (neg (-89)) 89

assertEqual "abs" (abs 0)     0
assertEqual "abs" (abs 15)    15
assertEqual "abs" (abs (-89)) 89

assertEqual "lt" (0.1 < 1.0) True
assertEqual "lt" (1.0 < 0.1) False
assertEqual "lt" (1.0 < 1.0) False

assertEqual "lte" (0.1 <= 1.0) True
assertEqual "lte" (1.0 <= 0.1) False
assertEqual "lte" (1.0 <= 1.0) True

assertEqual "gt" (0.1 > 1.0) False
assertEqual "gt" (1.0 > 0.1) True
assertEqual "gt" (1.0 > 1.0) False

assertEqual "gte" (0.1 >= 1.0) False
assertEqual "gte" (1.0 >= 0.1) True
assertEqual "gte" (1.0 >= 1.0) True

assertEqual "round" (round 3.1)    3
assertEqual "round" (round 3.7)    4
assertEqual "round" (round (-2.2)) (-2)
assertEqual "round" (round (-2.7)) (-3)

assertEqual "floor" (floor 3.1)    3
assertEqual "floor" (floor 3.7)    3
assertEqual "floor" (floor (-2.2)) (-3)
assertEqual "floor" (floor (-2.7)) (-3)

assertEqual "ceiling" (ceiling 3.1)    4
assertEqual "ceiling" (ceiling 3.7)    4
assertEqual "ceiling" (ceiling (-2.2)) (-2)
assertEqual "ceiling" (ceiling (-2.7)) (-2)

assertEqual "truncate" (truncate 3.1)    3
assertEqual "truncate" (truncate 3.7)    3
assertEqual "truncate" (truncate (-2.2)) (-2)
assertEqual "truncate" (truncate (-2.7)) (-2)

assertEqual "sqrt" (sqrt 4) 2
assertEqual "sqrt" (sqrt 4.0) 2.0
assertEqual "sqrt" (sqrt (-1)) i

assertEqual "exp" (exp 1) e
assertEqual "exp" (exp 1.0) 2.718281828459045
assertEqual "exp" (exp (-1.0)) 0.36787944117144233

assertEqual "log" (log e) 1
assertEqual "log" (log 10.0) 2.302585092994046

assertEqual "sin"   (sin 0.0) 0.0
assertEqual "cos"   (cos 0.0) 1.0
assertEqual "tan"   (tan 0.0) 0.0
assertEqual "asin"  (asin 0.0) 0.0
assertEqual "acos"  (acos 1.0) 0.0
assertEqual "atan"  (atan 0.0) 0.0
assertEqual "sinh"  (sinh 0.0) 0.0
assertEqual "cosh"  (cosh 0.0) 1.0
assertEqual "tanh"  (tanh 0.0) 0.0
assertEqual "asinh" (asinh 0.0) 0.0
assertEqual "acosh" (acosh 1.0) 0.0
assertEqual "atanh" (atanh 0.0) 0.0

-- tensorSize
-- tensorToList
-- dfOrder

assertEqual "itof" (itof 4)    4.0
assertEqual "itof" (itof (-1)) (-1.0)

assertEqual "rtof" (rtof (3 / 2)) 1.5
assertEqual "rtof" (rtof 1)       1.0

assertEqual "ctoi" (ctoi '1') 49

assertEqual "itoc" (itoc 49) '1'

assertEqual "pack" (pack []) ""
assertEqual "pack" (pack ['E', 'g', 'i', 's', 'o', 'n']) "Egison"

assertEqual "unpack" (unpack "Egison") ['E', 'g', 'i', 's', 'o', 'n']
assertEqual "unpack" (unpack "") []

assertEqual "unconsString" (unconsString "Egison") ('E', "gison")

assertEqual "lengthString" (lengthString "") 0
assertEqual "lengthString" (lengthString "Egison") 6

assertEqual "appendString" (appendString "" "")       ""
assertEqual "appendString" (appendString "" "Egison") "Egison"
assertEqual "appendString" (appendString "Egison" "") "Egison"
assertEqual "appendString" (appendString "Egi" "son") "Egison"

assertEqual "splitString" (splitString "," "") [""]
assertEqual "splitString" (splitString "," "2,3,5,7,11,13") ["2", "3", "5", "7", "11", "13"]

assertEqual "regex" (regex "cde" "abcdefg") [("ab", "cde", "fg")]
assertEqual "regex" (regex "[0-9]+" "abc123defg") [("abc", "123", "defg")]
assertEqual "regex" (regex "a*" "") [("", "", "")]

assertEqual "regexCg" (regexCg "([0-9]+),([0-9]+)" "abc,123,45,defg") [("abc,", ["123", "45"], ",defg")]

-- addPrime
-- addSubscript
-- addSuperscript
-- readProcess

assertEqual "read" (read "3")                3
assertEqual "read" (read "3.14")             3.14
assertEqual "read" (read "[1, 2]")            [1, 2]
assertEqual "read" (read "\"Hello world!\"") "Hello world!"

-- TODO: read-tsv

assertEqual "show" (show 3)              "3"
assertEqual "show" (show 3.14159)        "3.14159"
assertEqual "show" (show [1, 2])         "[1, 2]"
assertEqual "show" (show "Hello world!") "\"Hello world!\""

-- TODO: show-tsv

assertEqual "isBool" (isBool False) True

assertEqual "isInteger" (isInteger 1) True

assertEqual "isRational" (isRational 1)       True
assertEqual "isRational" (isRational (1 / 2)) True
assertEqual "isRational" (isRational 3.1)     False

assertEqual "isScalar" (isScalar 1) True
assertEqual "isScalar" (isScalar [| 1, 2 |]) False

assertEqual "isFloat" (isFloat 1.0) True
assertEqual "isFloat" (isFloat 1)   False

assertEqual "isChar" (isChar 'c') True

assertEqual "isString" (isString "hoge") True

assertEqual "isCollection" (isCollection []) True
assertEqual "isCollection" (isCollection [1]) True

assertEqual "isHash" (isHash {| |}) True
assertEqual "isHash" (isHash {| (1, 2) |}) True

assertEqual "isTensor" (isTensor 1)                           False
assertEqual "isTensor" (isTensor [| 1 |])                     True
assertEqual "isTensor" (isTensor (generateTensor (+) [1, 2])) True