update seconds ago function and add tests

pkg/utils/date_test.go

@@ -0,0 +1,97 @@
+package utils
+
+import (
+	"testing"
+)
+
+func TestFormatSecondsAgo(t *testing.T) {
+	tests := []struct {
+		name string
+		args int64
+		want string
+	}{
+		{
+			name: "zero",
+			args: 0,
+			want: "0s",
+		},
+		{
+			name: "one second",
+			args: 1,
+			want: "1s",
+		},
+		{
+			name: "almost a minute",
+			args: 59,
+			want: "59s",
+		},
+		{
+			name: "one minute",
+			args: 60,
+			want: "1m",
+		},
+		{
+			name: "one minute and one second",
+			args: 61,
+			want: "1m",
+		},
+		{
+			name: "almost one hour",
+			args: 3599,
+			want: "59m",
+		},
+		{
+			name: "one hour",
+			args: 3600,
+			want: "1h",
+		},
+		{
+			name: "almost one day",
+			args: 86399,
+			want: "23h",
+		},
+		{
+			name: "one day",
+			args: 86400,
+			want: "1d",
+		},
+		{
+			name: "almost a week",
+			args: 604799,
+			want: "6d",
+		},
+		{
+			name: "one week",
+			args: 604800,
+			want: "1w",
+		},
+		{
+			name: "six months",
+			args: SECONDS_IN_YEAR / 2,
+			want: "6m",
+		},
+		{
+			name: "almost one year",
+			args: 31535999,
+			want: "11m",
+		},
+		{
+			name: "one year",
+			args: SECONDS_IN_YEAR,
+			want: "1y",
+		},
+		{
+			name: "50 years",
+			args: SECONDS_IN_YEAR * 50,
+			want: "50y",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := formatSecondsAgo(tt.args); got != tt.want {
+				t.Errorf("formatSecondsAgo(%d) = %v, want %v", tt.args, got, tt.want)
+			}
+		})
+	}
+}