Add unit tests for the contributors route

Author: hasparus

.sync-state.json

@@ -18,4 +18,4 @@
       "lastProcessed": "2025-09-19T22:14:33.891Z"
     }
   }
-}
+}

src/app/api/contributors/route.test.tsx

@@ -0,0 +1,107 @@
+import { describe, it } from "node:test"
+import { strict as assert } from "node:assert"
+import { NextRequest } from "next/server"
+
+import { GET } from "./route"
+
+import contributorData from "../../../../scripts/sync-landing-schema/data.json"
+
+describe("Contributors API", () => {
+  it("returns 400 when project parameter is missing", async () => {
+    const request = new NextRequest("http://localhost:3000/api/contributors")
+    const response = await GET(request)
+
+    assert.strictEqual(response.status, 400)
+
+    const json = await response.json()
+    assert.strictEqual(json.error, "Bad request")
+    assert.strictEqual(json.message, "Repository parameter is required")
+  })
+
+  it("returns contributors data for synced project", async () => {
+    const request = new NextRequest(
+      "http://localhost:3000/api/contributors?project=GraphQL",
+    )
+    const response = await GET(request)
+
+    assert.strictEqual(response.status, 200)
+
+    const json = await response.json()
+    const expectedData = contributorData.GraphQL
+
+    // Should return all contributors when no pagination params
+    assert.strictEqual(json.length, 5) // Default first=5
+
+    // Should be sorted by contributions (descending), then by id (ascending)
+    const sortedExpected = expectedData
+      .sort((a, b) => {
+        if (b.contributions !== a.contributions) {
+          return b.contributions - a.contributions
+        }
+        return a.id.localeCompare(b.id)
+      })
+      .slice(0, 5)
+
+    assert.deepStrictEqual(json, sortedExpected)
+  })
+
+  it("returns empty array for a project we don't have data for", async () => {
+    const request = new NextRequest(
+      "http://localhost:3000/api/contributors?project=NonExistent",
+    )
+    const response = await GET(request)
+
+    assert.strictEqual(response.status, 200)
+
+    const json = await response.json()
+    assert.ok(Array.isArray(json))
+    assert.strictEqual(json.length, 0)
+  })
+
+  it("respects first parameter for pagination", async () => {
+    const request = new NextRequest(
+      "http://localhost:3000/api/contributors?project=GraphQL&first=2",
+    )
+    const response = await GET(request)
+
+    assert.strictEqual(response.status, 200)
+
+    const json = await response.json()
+    const expectedData = contributorData.GraphQL
+    const sortedExpected = expectedData
+      .sort((a, b) => {
+        if (b.contributions !== a.contributions) {
+          return b.contributions - a.contributions
+        }
+        return a.id.localeCompare(b.id)
+      })
+      .slice(0, 2)
+
+    assert.strictEqual(json.length, 2)
+    assert.deepStrictEqual(json, sortedExpected)
+  })
+
+  it("handles after parameter for cursor pagination", async () => {
+    const expectedData = contributorData.GraphQL
+    const sortedExpected = expectedData.sort((a, b) => {
+      if (b.contributions !== a.contributions) {
+        return b.contributions - a.contributions
+      }
+      return a.id.localeCompare(b.id)
+    })
+
+    // Get first contributor's ID to use as cursor
+    const firstContributorId = sortedExpected[0].id
+
+    const request = new NextRequest(
+      `http://localhost:3000/api/contributors?project=GraphQL&first=2&after=${firstContributorId}`,
+    )
+    const response = await GET(request)
+
+    const json = await response.json()
+    const expectedAfterFirst = sortedExpected.slice(1, 3)
+
+    assert.strictEqual(json.length, 2)
+    assert.deepStrictEqual(json, expectedAfterFirst)
+  })
+})

src/github-stats.json

@@ -1239,4 +1239,4 @@
     "lastRelease": "2025-09-01T19:49:28Z",
     "formattedLastRelease": "1 week ago"
   }
-}
+}