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46 lines
1023 B
Go
46 lines
1023 B
Go
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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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// Test of echo command. Run with: go test gopl.io/ch11/echo
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//!+
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package main
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import (
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"bytes"
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"fmt"
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"testing"
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)
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func TestEcho(t *testing.T) {
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var tests = []struct {
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newline bool
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sep string
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args []string
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want string
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}{
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{true, "", []string{}, "\n"},
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{false, "", []string{}, ""},
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{true, "\t", []string{"one", "two", "three"}, "one\ttwo\tthree\n"},
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{true, ",", []string{"a", "b", "c"}, "a,b,c\n"},
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{false, ":", []string{"1", "2", "3"}, "1:2:3"},
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}
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for _, test := range tests {
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descr := fmt.Sprintf("echo(%v, %q, %q)",
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test.newline, test.sep, test.args)
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out = new(bytes.Buffer) // captured output
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if err := echo(test.newline, test.sep, test.args); err != nil {
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t.Errorf("%s failed: %v", descr, err)
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continue
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}
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got := out.(*bytes.Buffer).String()
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if got != test.want {
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t.Errorf("%s = %q, want %q", descr, got, test.want)
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}
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}
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}
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//!-
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