meta_spec.lua

local vips = require "vips"
local ffi = require "ffi"

-- test metadata read/write
describe("metadata", function()
    local array, im
    local tmp_vips_filename = ffi.os == "Windows" and os.getenv("TMP") .. "\\x.v" or "/tmp/x.v"

    setup(function()
        array = { 1, 2, 3, 4 }
        im = vips.Image.new_from_array(array)
        -- vips.log.enable(true)
    end)

    teardown(function()
        os.remove(tmp_vips_filename)
    end)

    it("can set/get int", function()
        local im2 = im:copy()

        im2:set_type(vips.gvalue.gint_type, "banana", 12)
        assert.are.equal(im2:get("banana"), 12)
    end)

    it("can remove metadata", function()
        local im2 = im:copy()

        im2:set_type(vips.gvalue.gint_type, "banana", 12)
        im2:remove("banana")
        assert.are.equal(im2:get_typeof("banana"), 0)
    end)

    it("can set/get double", function()
        local im2 = im:copy()

        im2:set_type(vips.gvalue.gdouble_type, "banana", 3.1415)
        assert.are.equal(im2:get("banana"), 3.1415)
    end)

    it("can set/get string", function()
        local im2 = im:copy()

        im2:set_type(vips.gvalue.gstr_type, "banana", "tasty one")
        assert.are.same(im2:get("banana"), "tasty one")
    end)

    it("can set/get through vips file save/load", function()
        local im2 = im:copy()

        im2:set_type(vips.gvalue.gint_type, "banana", 12)
        im2:write_to_file(tmp_vips_filename)
        local im3 = vips.Image.new_from_file(tmp_vips_filename)
        assert.are.same(im3:get("banana"), im2:get("banana"))
    end)

    it("can get property enums as strings", function()
        local im2 = im:copy()

        assert.are.same(im2:format(), "double")
    end)
end)