Improve utility tests (#893)

tests/testutility.nim

@@ -16,61 +16,59 @@ import ../libp2p/utility
 suite "Utility":
 
   test "successful safeConvert from int8 to int16":
-    var result: int16 = safeConvert[int16, int8](-128)
+    let res = safeConvert[int16, int8]((-128).int8)
-    assert result == -128, fmt"Expected -128 but got {result}"
+    check res == -128'i16
 
   test "unsuccessful safeConvert from int16 to int8":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: int8 = safeConvert[int8, int16](32767))
+      result: int8 = safeConvert[int8, int16](32767'i16))
 
   test "successful safeConvert from uint8 to uint16":
-    var result: uint16 = safeConvert[uint16, uint8](255)
+    let res: uint16 = safeConvert[uint16, uint8](255'u8)
-    assert result == 255, fmt"Expected 255 but got {result}"
+    check res == 255'u16
 
   test "unsuccessful safeConvert from uint16 to uint8":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: uint8 = safeConvert[uint8, uint16](256))
+      result: uint8 = safeConvert[uint8, uint16](256'u16))
 
   test "successful safeConvert from char to int":
-    var result: int = safeConvert[int, char]('A')
+    let res: int = safeConvert[int, char]('A')
-    assert result == 65, fmt"Expected 65 but got {result}"
+    check res == 65
 
   test "unsuccessful safeConvert from int to char":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: char = safeConvert[char, int](128))
+      result: char = safeConvert[char, int](128))
 
   test "successful safeConvert from bool to int":
-    var result: int = safeConvert[int, bool](true)
+    let res: int = safeConvert[int, bool](true)
-    assert result == 1, fmt"Expected 1 but got {result}"
+    check res == 1
 
   test "unsuccessful safeConvert from int to bool":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: bool = safeConvert[bool, int](2))
+      result: bool = safeConvert[bool, int](2))
 
   test "successful safeConvert from enum to int":
     type Color = enum red, green, blue
-    var result: int = safeConvert[int, Color](green)
+    let res: int = safeConvert[int, Color](green)
-    assert result == 1, fmt"Expected 1 but got {result}"
+    check res == 1
 
   test "unsuccessful safeConvert from int to enum":
     type Color = enum red, green, blue
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: Color = safeConvert[Color, int](3))
+      result: Color = safeConvert[Color, int](3))
 
   test "successful safeConvert from range to int":
-    var result: int = safeConvert[int, range[1..10]](5)
+    let res: int = safeConvert[int, range[1..10]](5)
-    assert result == 5, fmt"Expected 5 but got {result}"
+    check res == 5
 
   test "unsuccessful safeConvert from int to range":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: range[1..10] = safeConvert[range[1..10], int](11))
+      result: range[1..10] = safeConvert[range[1..10], int](11))
 
   test "unsuccessful safeConvert from int to uint":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: uint = safeConvert[uint, int](11))
+      result: uint = safeConvert[uint, int](11))
 
   test "unsuccessful safeConvert from uint to int":
-    doAssert not (compiles do:
+    check not (compiles do:
-      var result: uint = safeConvert[int, uint](11))
+      result: uint = safeConvert[int, uint](11.uint))
-
-