chore: add various tests

pkg/formatters/duration_test.go

@@ -0,0 +1,22 @@
+package formatters
+
+import (
+    "testing"
+    "time"
+)
+
+func TestFormatDuration(t *testing.T) {
+    tests := []struct {
+        dur  time.Duration
+        want string
+    }{
+        {0, "N/A"},
+        {22*24*time.Hour + 7*time.Hour + 39*time.Minute + 31*time.Second, "22d 7h 39m 31s"},
+        {5*time.Minute + 15*time.Second, "5m 15s"},
+    }
+    for _, tc := range tests {
+        if got := FormatDuration(tc.dur); got != tc.want {
+            t.Errorf("FormatDuration(%v) = %s, want %s", tc.dur, got, tc.want)
+        }
+    }
+}

pkg/formatters/numbers_test.go

@@ -0,0 +1,22 @@
+package formatters
+
+import (
+    "testing"
+)
+
+func TestFormatNumber(t *testing.T) {
+    tests := []struct {
+        input int64
+        want  string
+    }{
+        {0, "0"},
+        {19823, "19.8k"},
+        {1500000, "1.50M"},
+        {-12345, "-12.3k"},
+    }
+    for _, tc := range tests {
+        if got := FormatNumber(tc.input); got != tc.want {
+            t.Errorf("FormatNumber(%d) = %s, want %s", tc.input, got, tc.want)
+        }
+    }
+}