93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
package lsproduct
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import "testing"
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const testVersion = 1
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// Retired testVersions
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// (none) ba7a22a355a32901caf46529c799fa53118ded0a
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var tests = []struct {
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digits string
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span int
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product int64
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ok bool
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}{
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{"0123456789",
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2, 72, true},
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{"12",
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2, 2, true},
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{"19",
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2, 9, true},
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{"576802143",
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2, 48, true},
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{"0123456789",
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3, 504, true},
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{"1027839564",
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3, 270, true},
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{"0123456789",
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5, 15120, true},
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{"73167176531330624919225119674426574742355349194934",
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6, 23520, true},
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{"52677741234314237566414902593461595376319419139427",
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6, 28350, true},
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{"",
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0, 1, true},
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{"123",
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4, 0, false},
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{pe1k, 5, 40824, true}, // original PE problem
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{pe1k, 13, 23514624000, true}, // new PE problem
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}
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const pe1k = "73167176531330624919225119674426574742355349194934" +
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"96983520312774506326239578318016984801869478851843" +
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"85861560789112949495459501737958331952853208805511" +
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"12540698747158523863050715693290963295227443043557" +
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"66896648950445244523161731856403098711121722383113" +
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"62229893423380308135336276614282806444486645238749" +
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"30358907296290491560440772390713810515859307960866" +
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"70172427121883998797908792274921901699720888093776" +
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"65727333001053367881220235421809751254540594752243" +
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"52584907711670556013604839586446706324415722155397" +
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"53697817977846174064955149290862569321978468622482" +
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"83972241375657056057490261407972968652414535100474" +
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"82166370484403199890008895243450658541227588666881" +
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"16427171479924442928230863465674813919123162824586" +
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"17866458359124566529476545682848912883142607690042" +
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"24219022671055626321111109370544217506941658960408" +
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"07198403850962455444362981230987879927244284909188" +
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"84580156166097919133875499200524063689912560717606" +
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"05886116467109405077541002256983155200055935729725" +
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"71636269561882670428252483600823257530420752963450"
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func TestLargestSeriesProduct(t *testing.T) {
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if TestVersion != testVersion {
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t.Fatalf("Found TestVersion = %v, want %v", TestVersion, testVersion)
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}
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for _, test := range tests {
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p, err := LargestSeriesProduct(test.digits, test.span)
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switch {
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case err != nil:
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if test.ok {
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t.Fatalf("LargestSeriesProduct(%s, %d) returned error %q. "+
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"Error not expected.",
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test.digits, test.span, err)
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}
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case !test.ok:
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t.Fatalf("LargestSeriesProduct(%s, %d) = %d, %v. Expected error",
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test.digits, test.span, p, err)
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case int64(p) != test.product:
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t.Fatalf("LargestSeriesProduct(%s, %d) = %d, want %d",
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test.digits, test.span, p, test.product)
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}
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}
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}
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func BenchmarkLargestSeriesProduct(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for _, test := range tests {
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LargestSeriesProduct(test.digits, test.span)
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}
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}
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}
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