tests: get set image type

Author: kwanhur

README.md

@@ -698,7 +698,7 @@ Generates an SHA-256 message digest for the image pixel stream.
 -----
 Gets the image ticks-per-second.
 
-`img:get_image_type()`
+`img:get_type()`
 -----
 Gets the potential image type:
 

lib/resty/imagick/wand/base.lua

@@ -836,8 +836,8 @@ _M.get_ticks_per_second = function(self)
     return lib.MagickGetImageTicksPerSecond(self.wand)
 end
 
-_M.get_image_type = function(self)
-    return image_type:to_str(lib.MagickGetImageType(self.wand))
+_M.get_type = function(self)
+    return image_type():to_str(lib.MagickGetImageType(self.wand))
 end
 
 _M.get_units = function(self)
@@ -881,7 +881,7 @@ _M.identify = function(self)
 end
 
 _M.identify_type = function(self)
-    return image_type:to_str(lib.MagickIdentifyImageType(self.wand))
+    return image_type():to_str(lib.MagickIdentifyImageType(self.wand))
 end
 
 _M.implode = function(self, radius, method)
@@ -1261,7 +1261,7 @@ end
 
 _M.set_type = function(self, itype)
     return handle_result(self, lib.MagickSetImageType(self.wand,
-      image_type:to_int(itype .. "Type")))
+      image_type():to_int(itype .. "Type")))
 end
 
 _M.set_units = function(self, units)

spec/002-attr.lua

@@ -63,4 +63,13 @@ describe("ImageAttr", function()
         cs = img:get_colorspace()
         assert.truthy(cs == "RGBColorspace")
     end)
+
+    it("getSetImageType", function()
+        local it = img:get_type()
+        assert.is_true(it == "TrueColorAlphaType")
+
+        img:set_type("Bilevel")
+        it = img:get_type()
+        assert.is_true(it == "BilevelType")
+    end)
 end)