added is_positive_infinity

DanielJDufour · Jul 31, 2022 · fa63e18 · fa63e18
1 parent f557e71
commit fa63e18
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Showing 4 changed files with 16 additions and 0 deletions.
diff --git a/is_positive_infinity.js b/is_positive_infinity.js
@@ -0,0 +1,3 @@
+module.exports = function is_positive_infinity(n) {
+  return !!n.match(/^\+?inf(inity)?$/i);
+};
diff --git a/package.json b/package.json
@@ -18,6 +18,7 @@
     "expand.js",
     "floor.js",
     "is_infinity.js",
+    "is_positive_infinity",
     "is_negative_infinity.js",
     "is_integer.js",
     "is_zero.js",

diff --git a/preciso.js b/preciso.js
@@ -8,6 +8,7 @@ const constants = require("./constants.js");
 const floor = require("./floor.js");
 
 const is_infinity = require("./is_infinity.js");
+const is_positive_infinity = require("./is_positive_infinity.js");
 const is_negative_infinity = require("./is_negative_infinity.js");
 const is_integer = require("./is_integer.js");
 const is_zero = require("./is_zero.js");
@@ -58,6 +59,7 @@ const module_exports = {
   floor,
 
   is_infinity,
+  is_positive_infinity,
   is_negative_infinity,
   is_integer,
   is_zero,

diff --git a/test.js b/test.js
@@ -11,6 +11,7 @@ const {
   divide,
   floor,
   is_infinity,
+  is_positive_infinity,
   is_negative_infinity,
   is_integer,
   is_zero,
@@ -63,6 +64,15 @@ test("is_negative_infinity", ({ eq }) => {
   eq(is_negative_infinity("-Infinity"), true);
 });
 
+test("is_positive_infinity", ({ eq }) => {
+  eq(is_positive_infinity("-inf"), false);
+  eq(is_positive_infinity("inf"), true);
+  eq(is_positive_infinity("Infinity"), true);
+  eq(is_positive_infinity("infinity"), true);
+  eq(is_positive_infinity("+Infinity"), true);
+  eq(is_positive_infinity("-Infinity"), false);
+});
+
 test("is_infinity", ({ eq }) => {
   eq(is_infinity("-inf"), true);
   eq(is_infinity("inf"), true);