clawbot
7fb688772e
DedupeStrings returns a new slice holding each value once, in the order each value first appeared, and leaves the input slice alone. Comes with a doc comment and table-driven tests. (closes #1) Model: opus-5
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
package util
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import (
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"reflect"
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"testing"
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)
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func TestDedupeStrings(t *testing.T) {
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tests := []struct {
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name string
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input []string
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expected []string
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}{
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{"nil stays nil", nil, nil},
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{"empty slice", []string{}, []string{}},
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{"nothing repeated", []string{"a", "b", "c"}, []string{"a", "b", "c"}},
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{"all one value", []string{"a", "a", "a"}, []string{"a"}},
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{"repeats next to each other", []string{"a", "a", "b", "b"}, []string{"a", "b"}},
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{"repeats far apart", []string{"a", "b", "a", "c", "b"}, []string{"a", "b", "c"}},
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{"empty string is a value", []string{"", "a", ""}, []string{"", "a"}},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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got := DedupeStrings(test.input)
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if !reflect.DeepEqual(got, test.expected) {
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t.Errorf("expected %#v got %#v", test.expected, got)
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}
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})
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}
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}
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func TestDedupeStringsLeavesInputAlone(t *testing.T) {
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input := []string{"b", "a", "b"}
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DedupeStrings(input)
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if !reflect.DeepEqual(input, []string{"b", "a", "b"}) {
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t.Errorf("expected the input to be unchanged, got %#v", input)
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}
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}
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