test(dunder): flip calculate and expected

Author: pysan3

spec/path_dunder_spec.lua

@@ -23,20 +23,20 @@ describe("Test Dunder Methods of Path Object;", function()
   local foo = Posix.new("./folder/foo.txt")
   describe("__tostring", function()
     it("()", function()
-      assert.are.equal(tostring(foo), "folder/foo.txt")
-      assert.are_not.equal(tostring(foo), "/folder/foo.txt")
+      assert.are.equal("folder/foo.txt", tostring(foo))
+      assert.are_not.equal("/folder/foo.txt", tostring(foo))
       local windows = Windows.new([[C:\hoge\fuga.txt]])
-      assert.are.equal(tostring(windows), [[C:\hoge\fuga.txt]])
+      assert.are.equal([[C:\hoge\fuga.txt]], tostring(windows))
     end)
   end)
 
   describe("__eq", function()
     it("()", function()
       foo.__string_cache = nil
-      assert.are.equal(foo, Posix.new("./folder/foo.txt")) -- "./" does not matter
-      assert.are.equal(foo, Posix.new("folder/foo.txt"))
-      assert.are_not.equal(foo, Posix.new("foo.txt"))
-      assert.are_not.equal(foo, Posix.new("/folder/foo.txt"))
+      assert.are.equal(Posix.new("./folder/foo.txt"), foo) -- "./" does not matter
+      assert.are.equal(Posix.new("folder/foo.txt"), foo)
+      assert.are_not.equal(Posix.new("foo.txt"), foo)
+      assert.are_not.equal(Posix.new("/folder/foo.txt"), foo)
     end)
   end)
 
@@ -61,9 +61,9 @@ describe("Test Dunder Methods of Path Object;", function()
 
   describe("__div", function()
     it("()", function()
-      assert.are.equal(foo, Posix.new(".") / "folder" / "foo.txt")
-      assert.are.equal(foo, Posix.new("folder") / "foo.txt")
-      assert.are.equal(foo, Posix.new(".") / Posix.new("./") / Posix.new("./folder") / "foo.txt")
+      assert.are.equal(Posix.new(".") / "folder" / "foo.txt", foo)
+      assert.are.equal(Posix.new("folder") / "foo.txt", foo)
+      assert.are.equal(Posix.new(".") / Posix.new("./") / Posix.new("./folder") / "foo.txt", foo)
       -- Path.new(".") many times is OK
     end)
 
@@ -78,7 +78,7 @@ describe("Test Dunder Methods of Path Object;", function()
     it("()", function()
       local file = Posix.new("./folder")
       assert.are.equal("folder/foo/bar", file .. "/foo/bar")
-      assert.are.equal(tostring(file) .. "/foo/bar", file .. "/foo/bar")
+      assert.are.equal(file .. "/foo/bar", tostring(file) .. "/foo/bar")
     end)
 
     it("raise error", function()