Jan Novak
f047150004
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Configured-month cases now read expected values from AdultFeeMonthlyRate / JuniorFeeMonthlyRate via a mustRate helper that panics if a test month is removed from the map. Fallback cases use AdultFeeDefault / JuniorFeeDefault. This way the tests verify dispatch logic (0/1/2+ branching, map vs. fallback) without breaking when rates are intentionally updated in the map. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
package fees
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import "testing"
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func TestCalculateFee(t *testing.T) {
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t.Parallel()
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// mustRate returns the configured rate for a month that must be in the map.
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// It panics immediately if the month is absent — so if a rate entry is ever
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// removed, the test fails loudly rather than silently comparing against
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// Go's zero value.
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mustRate := func(month string) int {
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r, ok := AdultFeeMonthlyRate[month]
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if !ok {
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panic("test month not in AdultFeeMonthlyRate: " + month)
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}
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return r
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}
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tests := []struct {
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name string
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count int
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month string
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want int
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}{
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// Zero attendance always returns 0.
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{"zero short-circuits", 0, "2026-05", 0},
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{"zero empty month", 0, "", 0},
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// Single practice returns AdultFeeSingle regardless of month.
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{"single practice", 1, "2026-05", AdultFeeSingle},
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{"single ignores monthKey", 1, "unknown", AdultFeeSingle},
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// Two+ practices for a configured month: must use the map value, not the default.
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// Expected values are read from AdultFeeMonthlyRate so this test stays correct
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// when rates are updated — the assertion verifies dispatch logic, not rate values.
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{"two practices configured month", 2, "2026-05", mustRate("2026-05")},
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{"two practices reduced march", 2, "2026-03", mustRate("2026-03")},
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{"two practices early season", 2, "2025-09", mustRate("2025-09")},
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{"high count same as two", 5, "2026-05", mustRate("2026-05")},
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// Two+ practices for an unknown/future month: must fall back to AdultFeeDefault.
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{"unknown future month falls back", 2, "2027-01", AdultFeeDefault},
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{"empty month falls back", 2, "", AdultFeeDefault},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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got := CalculateFee(tc.count, tc.month)
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if got != tc.want {
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t.Errorf("CalculateFee(%d, %q) = %d, want %d", tc.count, tc.month, got, tc.want)
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}
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})
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}
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}
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