Backend/Implemented getCohort and its tests

src/lib/api/getCohorts.ts

@@ -0,0 +1,22 @@
+import { createClient } from "@/lib/client/supabase";
+import type { Database } from "@/lib/client/supabase/types";
+
+type CohortRow = Database["public"]["Tables"]["Cohorts"]["Row"];
+
+export async function getCohorts(): Promise<CohortRow[]> {
+  // Initialize Supabase client
+  const client = await createClient();
+
+  const { data, error, status } = await client.from("Cohorts").select();
+
+  // Log the response for debugging
+  console.log("Supabase client response:", { error, data, status });
+
+  // Handle any errors from the query
+  if (error) {
+    throw new Error(error.message || JSON.stringify(error));
+  }
+
+  // Return the fetched data as a list of VolunteerRow or an empty array if none
+  return (data as CohortRow[]) || [];
+}

tests/lib/api/getCohorts.test.ts

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+// Example test for getExample function
+// This test is not meaningful as is, but serves as a template
+// You should modify it to fit your actual implementation and testing needs
+
+import { describe, it, expect, beforeEach, afterEach } from "vitest";
+import { getCohorts } from "@/lib/api/getCohorts";
+import { createServiceTestClient, deleteWhereGte } from "../support/helpers";
+import { makeTestCohortInsert, TEST_YEAR } from "../support/factories";
+import type { Database } from "@/lib/client/supabase/types";
+
+type CohortRow = Database["public"]["Tables"]["Cohorts"]["Row"];
+
+describe("getCohorts", () => {
+  const client = createServiceTestClient();
+  beforeEach(async () => {
+    await deleteWhereGte(client, "Cohorts", "year", TEST_YEAR);
+  });
+
+  afterEach(async () => {
+    await deleteWhereGte(client, "Cohorts", "year", TEST_YEAR);
+  });
+
+  // Test case to verify fetching cohorts
+  it("should fetch all cohort data successfully", async () => {
+    // create two cohorts to ensure at least two cohorts are returned
+    const { data: cohort1 } = await client
+      .from("Cohorts")
+      .insert(makeTestCohortInsert({ term: "Fall", year: TEST_YEAR }))
+      .select()
+      .single();
+
+    const { data: cohort2 } = await client
+      .from("Cohorts")
+      .insert(makeTestCohortInsert({ term: "Spring", year: TEST_YEAR }))
+      .select()
+      .single();
+
+    const result = await getCohorts();
+
+    expect(Array.isArray(result)).toBe(true);
+
+    if (result.length > 0) {
+      // Check properties of the first cohort
+      console.log("Result has at least one cohort. Verifying properties...");
+      const first = result[0] as CohortRow;
+      expect(first).toHaveProperty("id");
+      console.log("Verified property: id");
+      expect(first).toHaveProperty("term");
+      console.log("Verified property: term");
+      expect(first).toHaveProperty("is_active");
+      console.log("Verified property: is_active");
+    }
+    if (cohort1) {
+      expect(result.includes(cohort1));
+      console.log("Verified cohort1 is returned");
+    }
+    if (cohort2) {
+      expect(result.includes(cohort2));
+      console.log("Verified cohort2 is returned");
+    }
+  });
+});