Add finer ranking levels (#2762)

* Add finer ranking levels

* Update rank description

tests/calculateRank.test.js

@@ -2,7 +2,7 @@ import "@testing-library/jest-dom";
 import { calculateRank } from "../src/calculateRank.js";
 
 describe("Test calculateRank", () => {
-  it("new user gets B rank", () => {
+  it("new user gets C rank", () => {
     expect(
       calculateRank({
         all_commits: false,
@@ -13,10 +13,24 @@ describe("Test calculateRank", () => {
         stars: 0,
         followers: 0,
       }),
-    ).toStrictEqual({ level: "B", score: 100 });
+    ).toStrictEqual({ level: "C", percentile: 100 });
   });
 
-  it("average user gets A rank", () => {
+  it("beginner user gets B- rank", () => {
+    expect(
+      calculateRank({
+        all_commits: false,
+        commits: 125,
+        prs: 25,
+        issues: 10,
+        repos: 0,
+        stars: 25,
+        followers: 5,
+      }),
+    ).toStrictEqual({ level: "B-", percentile: 69.333868386557 });
+  });
+
+  it("median user gets B+ rank", () => {
     expect(
       calculateRank({
         all_commits: false,
@@ -24,13 +38,13 @@ describe("Test calculateRank", () => {
         prs: 50,
         issues: 25,
         repos: 0,
-        stars: 250,
-        followers: 25,
+        stars: 50,
+        followers: 10,
       }),
-    ).toStrictEqual({ level: "A", score: 50 });
+    ).toStrictEqual({ level: "B+", percentile: 50 });
   });
 
-  it("average user gets A rank (include_all_commits)", () => {
+  it("average user gets B+ rank (include_all_commits)", () => {
     expect(
       calculateRank({
         all_commits: true,
@@ -38,13 +52,13 @@ describe("Test calculateRank", () => {
         prs: 50,
         issues: 25,
         repos: 0,
-        stars: 250,
-        followers: 25,
+        stars: 50,
+        followers: 10,
       }),
-    ).toStrictEqual({ level: "A", score: 50 });
+    ).toStrictEqual({ level: "B+", percentile: 50 });
   });
 
-  it("more than average user gets A+ rank", () => {
+  it("advanced user gets A rank", () => {
     expect(
       calculateRank({
         all_commits: false,
@@ -52,13 +66,13 @@ describe("Test calculateRank", () => {
         prs: 100,
         issues: 50,
         repos: 0,
-        stars: 500,
-        followers: 50,
+        stars: 200,
+        followers: 40,
       }),
-    ).toStrictEqual({ level: "A+", score: 25 });
+    ).toStrictEqual({ level: "A", percentile: 22.72727272727273 });
   });
 
-  it("expert user gets S rank", () => {
+  it("expert user gets A+ rank", () => {
     expect(
       calculateRank({
         all_commits: false,
@@ -66,23 +80,23 @@ describe("Test calculateRank", () => {
         prs: 200,
         issues: 100,
         repos: 0,
-        stars: 1000,
-        followers: 100,
+        stars: 800,
+        followers: 160,
       }),
-    ).toStrictEqual({ level: "S", score: 6.25 });
+    ).toStrictEqual({ level: "A+", percentile: 6.082887700534744 });
   });
 
-  it("ezyang gets S+ rank", () => {
+  it("sindresorhus gets S rank", () => {
     expect(
       calculateRank({
         all_commits: false,
-        commits: 1000,
-        prs: 4000,
-        issues: 2000,
+        commits: 1300,
+        prs: 1500,
+        issues: 4500,
         repos: 0,
-        stars: 5000,
-        followers: 2000,
+        stars: 600000,
+        followers: 50000,
       }),
-    ).toStrictEqual({ level: "S+", score: 1.1363983154296875 });
+    ).toStrictEqual({ level: "S", percentile: 0.49947889605312934 });
   });
 });