Merge tests into a larger file (part 5 of ∞) (#9368)

* merge magics

* merge metatype tests

* merge method tests

* merge objects tests

* change `import future` to `import sugar`

Nim in Action tests are left with `import future`, to ensure compatibility.

* merge overload tests

* merge proc tests

* merge procvar tests

* merge range tests

* merge seq tests

* merge sets tests

* remove wrong assert from `tsets3`

* fix `jsTests`

* better fix

tests/method/tmultimjs.nim

@@ -0,0 +1,72 @@
+discard """
+  output: '''
+7
+Hi derived!
+hello
+'''
+"""
+
+
+# tmultim1
+type
+  Expression = ref object {.inheritable.}
+  Literal = ref object of Expression
+    x: int
+  PlusExpr = ref object of Expression
+    a, b: Expression
+
+method eval(e: Expression): int {.base.} = quit "to override!"
+method eval(e: Literal): int = return e.x
+method eval(e: PlusExpr): int = return eval(e.a) + eval(e.b)
+
+proc newLit(x: int): Literal =
+  new(result)
+  result.x = x
+
+proc newPlus(a, b: Expression): PlusExpr =
+  new(result)
+  result.a = a
+  result.b = b
+
+echo eval(newPlus(newPlus(newLit(1), newLit(2)), newLit(4))) #OUT 7
+
+
+
+# tmultim3
+import mmultim3
+
+type TBObj* = object of TObj
+
+method test123(a : ref TBObj) =
+    echo("Hi derived!")
+
+var aa: ref TBObj
+new(aa)
+myObj = aa
+testMyObj()
+
+
+
+# tmultim4
+type Test = object of RootObj
+
+method doMethod(a: ref RootObj) {.base, raises: [IoError].} =
+  quit "override"
+
+method doMethod(a: ref Test) =
+  echo "hello"
+  if a == nil:
+    raise newException(IoError, "arg")
+
+proc doProc(a: ref Test) =
+  echo "hello"
+
+proc newTest(): ref Test =
+  new(result)
+
+var s:ref Test = newTest()
+
+#doesn't work
+for z in 1..4:
+  s.doMethod()
+  break