test: add unit tests for lib/output.js

package.json

@@ -12,6 +12,9 @@
     "lib"
   ],
   "type": "commonjs",
+  "scripts": {
+    "test": "node --test"
+  },
   "keywords": [
     "furlpay",
     "stablecoin",

test/output.test.js

@@ -0,0 +1,163 @@
+const test = require("node:test");
+const assert = require("node:assert/strict");
+
+const {
+  visibleLength,
+  pad,
+  csv,
+  sparkline,
+  table,
+} = require("../lib/output");
+
+const { c } = require("../lib/util");
+
+// visibleLength
+
+test("visibleLength ignores ANSI escape sequences", () => {
+  const colored = c.green("Hello");
+
+  assert.equal(visibleLength(colored), 5);
+});
+
+// pad
+
+test("pad left aligns text", () => {
+  assert.equal(pad("ABC", 5), "ABC  ");
+});
+
+test("pad right aligns text", () => {
+  assert.equal(pad("ABC", 5, "right"), "  ABC");
+});
+
+test("pad correctly handles ANSI-colored text", () => {
+  const colored = c.green("ABC");
+
+  assert.equal(visibleLength(pad(colored, 5)), 5);
+});
+
+// csv
+
+test("csv correctly escapes comma, quotes and newlines together", () => {
+  const rows = [
+    {
+      name: 'Hello, "World"\nNext Line',
+    },
+  ];
+
+  const cols = [
+    {
+      key: "name",
+      label: "Name",
+    },
+  ];
+
+  const output = csv(rows, cols);
+
+ assert.ok(
+  output.includes('"Hello, ""World""\nNext Line"')
+);
+});
+
+test("csv strips ANSI escape sequences", () => {
+  const rows = [
+    {
+      name: c.green("USDC"),
+    },
+  ];
+
+  const cols = [
+    {
+      key: "name",
+      label: "Name",
+    },
+  ];
+
+  const output = csv(rows, cols);
+
+  assert.ok(output.includes("USDC"));
+  assert.ok(!output.includes("\x1b"));
+});
+
+// sparkline
+
+test("sparkline returns an empty string for empty input", () => {
+  assert.equal(sparkline([]), "");
+});
+
+test("sparkline preserves current behavior for a single value", () => {
+  assert.equal(sparkline([5]), "▁");
+});
+
+test("sparkline normalizes values across the full range", () => {
+  const result = sparkline([1, 2, 3, 4, 5]);
+
+  assert.equal(result.length, 5);
+  assert.equal(result[0], "▁");
+  assert.equal(result[result.length - 1], "█");
+});
+
+// table
+test("table renders headers", () => {
+  const rows = [
+    { asset: "USDC", amount: "100" },
+  ];
+
+  const cols = [
+    { key: "asset", label: "Asset" },
+    { key: "amount", label: "Amount", align: "right" },
+  ];
+
+  const output = table(rows, cols);
+
+  assert.ok(output.includes("Asset"));
+  assert.ok(output.includes("Amount"));
+});
+
+test("table correctly aligns ANSI-colored cells", () => {
+  const rows = [
+    {
+      asset: c.green("USDC"),
+      amount: "100",
+    },
+    {
+      asset: c.red("ETH"),
+      amount: "200",
+    },
+  ];
+
+  const cols = [
+    { key: "asset", label: "Asset" },
+    { key: "amount", label: "Amount" },
+  ];
+
+  const output = table(rows, cols);
+
+ const dataRows = output
+  .split("\n")
+  .filter((line)=> line.startsWith("│"));
+
+assert.equal(
+  visibleLength(dataRows[1]),
+  visibleLength(dataRows[2])
+);
+
+assert.ok(output.includes(c.green("USDC")));
+assert.ok(output.includes(c.red("ETH")));
+});
+
+test("table renders box drawing borders", () => {
+  const rows = [
+    { asset: "USDC" },
+  ];
+
+  const cols = [
+    { key: "asset", label: "Asset" },
+  ];
+
+  const output = table(rows, cols);
+
+  assert.ok(output.includes("┌"));
+  assert.ok(output.includes("┐"));
+  assert.ok(output.includes("└"));
+  assert.ok(output.includes("┘"));
+});