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88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
/*
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* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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This test file is part of the spew package rather than than the spew_test
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package because it needs access to internals to properly test certain cases
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which are not possible via the public interface since they should never happen.
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*/
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package spew
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import (
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"bytes"
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"reflect"
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"testing"
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)
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// dummyFmtState implements a fake fmt.State to use for testing invalid
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// reflect.Value handling. This is necessary because the fmt package catches
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// invalid values before invoking the formatter on them.
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type dummyFmtState struct {
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bytes.Buffer
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}
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func (dfs *dummyFmtState) Flag(f int) bool {
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if f == int('+') {
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return true
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}
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return false
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}
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func (dfs *dummyFmtState) Precision() (int, bool) {
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return 0, false
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}
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func (dfs *dummyFmtState) Width() (int, bool) {
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return 0, false
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}
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// TestInvalidReflectValue ensures the dump and formatter code handles an
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// invalid reflect value properly. This needs access to internal state since it
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// should never happen in real code and therefore can't be tested via the public
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// API.
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func TestInvalidReflectValue(t *testing.T) {
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i := 1
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// Dump invalid reflect value.
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v := new(reflect.Value)
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buf := new(bytes.Buffer)
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d := dumpState{w: buf, cs: &Config}
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d.dump(*v)
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s := buf.String()
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want := "<invalid>"
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if s != want {
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t.Errorf("InvalidReflectValue #%d\n got: %s want: %s", i, s, want)
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}
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i++
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// Formatter invalid reflect value.
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buf2 := new(dummyFmtState)
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f := formatState{value: *v, cs: &Config, fs: buf2}
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f.format(*v)
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s = buf2.String()
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want = "<invalid>"
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if s != want {
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t.Errorf("InvalidReflectValue #%d got: %s want: %s", i, s, want)
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}
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}
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// SortValues makes the internal sortValues function available to the test
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// package.
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func SortValues(values []reflect.Value, cs *ConfigState) {
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sortValues(values, cs)
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}
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