feat: respect integer format pref

apps/web/test/format.spec.ts

@@ -1,4 +1,3 @@
-/* eslint-disable max-lines -- Test suites naturally have many cases */
 /* eslint-disable max-lines-per-function -- Test suites naturally have many cases */
 /* eslint-disable max-nested-callbacks -- Vitest structure requires nesting */
 /**
@@ -197,4 +196,109 @@ describe("formatInteger", () => {
       expect(formatInteger(1e39)).toBe("1b");
     });
   });
+
+  describe("suffix format (default)", () => {
+    it("should format small numbers with one decimal place", () => {
+      expect(formatInteger(999)).toBe("999.0");
+    });
+
+    it("should format thousands with K suffix", () => {
+      expect(formatInteger(1000)).toBe("1.00K");
+    });
+
+    it("should format millions with M suffix", () => {
+      expect(formatInteger(1_000_000)).toBe("1.00M");
+    });
+
+    it("should format billions with B suffix", () => {
+      expect(formatInteger(1_000_000_000)).toBe("1.00B");
+    });
+
+    it("should format trillions with T suffix", () => {
+      expect(formatInteger(1e12)).toBe("1.00T");
+    });
+
+    it("should format quadrillions with Qa suffix", () => {
+      expect(formatInteger(1e15)).toBe("1.00Qa");
+    });
+
+    it("should format quintillions with Qi suffix", () => {
+      expect(formatInteger(1e18)).toBe("1.00Qi");
+    });
+
+    it("should format sextillions with Sx suffix", () => {
+      expect(formatInteger(1e21)).toBe("1.00Sx");
+    });
+
+    it("should format septillions with Sp suffix", () => {
+      expect(formatInteger(1e24)).toBe("1.00Sp");
+    });
+
+    it("should format octillions with Oc suffix", () => {
+      expect(formatInteger(1e27)).toBe("1.00Oc");
+    });
+
+    it("should format nonillions with No suffix", () => {
+      expect(formatInteger(1e30)).toBe("1.00No");
+    });
+
+    it("should format decillions with Dc suffix", () => {
+      expect(formatInteger(1e33)).toBe("1.00Dc");
+    });
+
+    it("should format values >= 1e36 with letter suffix 'a'", () => {
+      expect(formatInteger(1e36)).toBe("1.00a");
+    });
+
+    it("should format values >= 1e39 with letter suffix 'b'", () => {
+      expect(formatInteger(1e39)).toBe("1.00b");
+    });
+
+    it("should format values at 26th letter step with 'z'", () => {
+      expect(formatInteger(1e36 * Math.pow(10, 25 * 3))).toBe("1.00z");
+    });
+
+    it("should format values at 27th letter step with 'aa'", () => {
+      expect(formatInteger(1e36 * Math.pow(10, 26 * 3))).toBe("1.00aa");
+    });
+  });
+
+  describe("scientific format", () => {
+    it("should fall back to suffix format below 1e6", () => {
+      expect(formatInteger(500, "scientific")).toBe("500.0");
+    });
+
+    it("should format values >= 1e6 in scientific notation", () => {
+      expect(formatInteger(1_230_000, "scientific")).toBe("1.23e6");
+    });
+
+    it("should format large values in scientific notation", () => {
+      expect(formatInteger(1e18, "scientific")).toBe("1.00e18");
+    });
+  });
+
+  describe("engineering format", () => {
+    it("should fall back to suffix format below 1e6", () => {
+      expect(formatInteger(500, "engineering")).toBe("500.0");
+    });
+
+    it("should format values >= 1e6 with exponent multiple of 3", () => {
+      expect(formatInteger(1_230_000, "engineering")).toBe("1.23E6");
+    });
+
+    it("should format 1e9 correctly in engineering notation", () => {
+      expect(formatInteger(1e9, "engineering")).toBe("1.00E9");
+    });
+
+    it("should format 12350000 correctly in engineering notation", () => {
+      expect(formatInteger(12_350_000, "engineering")).toBe("12.35E6");
+    });
+  });
+
+  describe("unknown format (default branch)", () => {
+    it("should fall back to suffix format for an unrecognised format string", () => {
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Testing unreachable default branch */
+      expect(formatInteger(1000, "unknown" as never)).toBe("1.00K");
+    });
+  });
 });