80 lines
3.9 KiB
Go
80 lines
3.9 KiB
Go
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package twelve
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import (
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"fmt"
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"strings"
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"testing"
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)
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const targetTestVersion = 1
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type testCase struct {
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input int
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expected string
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}
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var testCases = []testCase{
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{1, "On the first day of Christmas my true love gave to me, a Partridge in a Pear Tree."},
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{2, "On the second day of Christmas my true love gave to me, two Turtle Doves, and a Partridge in a Pear Tree."},
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{3, "On the third day of Christmas my true love gave to me, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{4, "On the fourth day of Christmas my true love gave to me, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{5, "On the fifth day of Christmas my true love gave to me, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{6, "On the sixth day of Christmas my true love gave to me, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{7, "On the seventh day of Christmas my true love gave to me, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{8, "On the eighth day of Christmas my true love gave to me, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{9, "On the ninth day of Christmas my true love gave to me, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{10, "On the tenth day of Christmas my true love gave to me, ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{11, "On the eleventh day of Christmas my true love gave to me, eleven Pipers Piping, ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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{12, "On the twelfth day of Christmas my true love gave to me, twelve Drummers Drumming, eleven Pipers Piping, ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree."},
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}
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// diff compares two multi-line strings and returns a helpful comment
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func diff(got, want string) string {
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g := strings.Split(got, "\n")
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w := strings.Split(want, "\n")
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for i := 0; ; i++ {
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switch {
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case i < len(g) && i < len(w):
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if g[i] == w[i] {
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continue
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}
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return fmt.Sprintf("-- first difference in line %d:\n"+
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"-- got : %q\n-- want: %q\n", i+1, g[i], w[i])
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case i < len(g):
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return fmt.Sprintf("-- got %d extra lines after line %d:\n"+
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"-- first extra line: %q\n", len(g)-len(w), i, g[i])
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case i < len(w):
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return fmt.Sprintf("-- got %d correct lines, want %d more lines:\n"+
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"-- want next: %q\n", i, len(w)-i, w[i])
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default:
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return "no differences found"
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}
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}
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}
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func TestSong(t *testing.T) {
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var expected = ""
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for _, test := range testCases {
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expected += test.expected + "\n"
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}
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actual := Song()
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if expected != actual {
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t.Fatalf("Song() =\n%s\n want:\n%s\n%s", actual, expected, diff(actual, expected))
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}
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}
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func TestVerse(t *testing.T) {
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for _, test := range testCases {
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actual := Verse(test.input)
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if actual != test.expected {
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t.Errorf("Twelve Days test [%d], expected [%s], actual [%s]", test.input, test.expected, actual)
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}
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}
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}
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func TestTestVersion(t *testing.T) {
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if testVersion != targetTestVersion {
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t.Errorf("Found testVersion = %v, want %v.", testVersion, targetTestVersion)
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}
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}
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