More descriptive names of test files (#9531)

* change generic `tissues` name to more specific
* change `tvarious` to more specific names

tests/objects/tobjects_various.nim

@@ -0,0 +1,87 @@
+discard """
+  output: '''
+34
+b
+wohoo
+baz
+'''
+"""
+
+
+block tobject2:
+  # Tests the object implementation
+  type
+    TPoint2d {.inheritable.} = object
+      x, y: int
+    TPoint3d = object of TPoint2d
+      z: int # added a field
+
+  proc getPoint( p: var TPoint2d) =
+    {.breakpoint.}
+    writeLine(stdout, p.x)
+
+  var p: TPoint3d
+
+  TPoint2d(p).x = 34
+  p.y = 98
+  p.z = 343
+
+  getPoint(p)
+
+
+
+block tofopr:
+  type
+    TMyType = object {.inheritable.}
+      len: int
+      data: string
+
+    TOtherType = object of TMyType
+
+  proc p(x: TMyType): bool =
+    return x of TOtherType
+
+  var
+    m: TMyType
+    n: TOtherType
+
+  doAssert p(m) == false
+  doAssert p(n)
+
+
+
+block toop:
+  type
+    TA = object of RootObj
+      x, y: int
+    TB = object of TA
+      z: int
+    TC = object of TB
+      whatever: string
+
+  proc p(a: var TA) = echo "a"
+  proc p(b: var TB) = echo "b"
+
+  var c: TC
+  p(c)
+
+
+
+block tfefobjsyntax:
+  type
+    Foo = object
+      a, b: int
+      s: string
+    FooBar = object of RootObj
+      n, m: string
+    Baz = object of FooBar
+
+  proc invoke(a: ref Baz) =
+    echo "baz"
+
+  # check object construction:
+  let x = (ref Foo)(a: 0, b: 45, s: "wohoo")
+  echo x.s
+
+  var y: ref FooBar = (ref Baz)(n: "n", m: "m")
+  invoke((ref Baz)(y))