package leap import "testing" // Define a function IsLeapYear(int) bool. // // Also define a testVersion with a value that matches // the targetTestVersion here. const targetTestVersion = 2 func TestLeapYears(t *testing.T) { if testVersion != targetTestVersion { t.Fatalf("Found testVersion = %v, want %v", testVersion, targetTestVersion) } for _, test := range testCases { observed := IsLeapYear(test.year) if observed != test.expected { t.Fatalf("IsLeapYear(%d) = %t, want %t (%s)", test.year, observed, test.expected, test.description) } } } // Benchmark 400 year interval to get fair weighting of different years. func Benchmark400(b *testing.B) { for i := 0; i < b.N; i++ { for y := 1600; y < 2000; y++ { IsLeapYear(y) } } }