Diff

--- a/spec/util_datetime_spec.lua	Mon Dec 12 20:40:23 2022 +0100
+++ b/spec/util_datetime_spec.lua	Mon Dec 12 07:10:54 2022 +0100
@@ -16,7 +16,10 @@
 			assert.truthy(string.find(date(), "^%d%d%d%d%-%d%d%-%d%d$"));
 		end);
 		it("should work", function ()
-			assert.equals(date(1136239445), "2006-01-02");
+			assert.equals("2006-01-02", date(1136239445));
+		end);
+		it("should ignore fractional parts", function ()
+			assert.equals("2006-01-02", date(1136239445.5));
 		end);
 	end);
 	describe("#time", function ()
@@ -32,8 +35,14 @@
 			assert.truthy(string.find(time(), "^%d%d:%d%d:%d%d"));
 		end);
 		it("should work", function ()
-			assert.equals(time(1136239445), "22:04:05");
+			assert.equals("22:04:05", time(1136239445));
 		end);
+		it("should handle precision", function ()
+			assert.equal("14:46:31.158200", time(1660488391.1582))
+			assert.equal("14:46:32.158200", time(1660488392.1582))
+			assert.equal("14:46:33.158200", time(1660488393.1582))
+			assert.equal("14:46:33.999900", time(1660488393.9999))
+		end)
 	end);
 	describe("#datetime", function ()
 		local datetime = util_datetime.datetime;
@@ -48,14 +57,23 @@
 			assert.truthy(string.find(datetime(), "^%d%d%d%d%-%d%d%-%d%dT%d%d:%d%d:%d%d"));
 		end);
 		it("should work", function ()
-			assert.equals(datetime(1136239445), "2006-01-02T22:04:05Z");
+			assert.equals("2006-01-02T22:04:05Z", datetime(1136239445));
 		end);
+		it("should handle precision", function ()
+			assert.equal("2022-08-14T14:46:31.158200Z", datetime(1660488391.1582))
+			assert.equal("2022-08-14T14:46:32.158200Z", datetime(1660488392.1582))
+			assert.equal("2022-08-14T14:46:33.158200Z", datetime(1660488393.1582))
+			assert.equal("2022-08-14T14:46:33.999900Z", datetime(1660488393.9999))
+		end)
 	end);
 	describe("#legacy", function ()
 		local legacy = util_datetime.legacy;
 		it("should exist", function ()
 			assert.is_function(legacy);
 		end);
+		it("should not add precision", function ()
+			assert.equal("20220814T14:46:31", legacy(1660488391.1582));
+		end);
 	end);
 	describe("#parse", function ()
 		local parse = util_datetime.parse;
@@ -64,13 +82,23 @@
 		end);
 		it("should work", function ()
 			-- Timestamp used by Go
-			assert.equals(parse("2017-11-19T17:58:13Z"),     1511114293);
-			assert.equals(parse("2017-11-19T18:58:50+0100"), 1511114330);
-			assert.equals(parse("2006-01-02T15:04:05-0700"), 1136239445);
+			assert.equals(1511114293, parse("2017-11-19T17:58:13Z"));
+			assert.equals(1511114330, parse("2017-11-19T18:58:50+0100"));
+			assert.equals(1136239445, parse("2006-01-02T15:04:05-0700"));
+			assert.equals(1136239445, parse("2006-01-02T15:04:05-07"));
 		end);
 		it("should handle timezones", function ()
 			-- https://xmpp.org/extensions/xep-0082.html#example-2 and 3
 			assert.equals(parse("1969-07-21T02:56:15Z"), parse("1969-07-20T21:56:15-05:00"));
 		end);
+		it("should handle precision", function ()
+			-- floating point comparison is not an exact science
+			assert.truthy(math.abs(1660488392.1582 - parse("2022-08-14T14:46:32.158200Z")) < 0.001)
+		end)
+		it("should return nil when given invalid inputs", function ()
+			assert.is_nil(parse(nil));
+			assert.is_nil(parse("hello world"));
+			assert.is_nil(parse("2017-11-19T18:58:50$0100"));
+		end);
 	end);
 end);