mirror of
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305 lines
9.6 KiB
Go
305 lines
9.6 KiB
Go
// Copyright 2014 Canonical Ltd.
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// Licensed under the LGPLv3, see LICENCE file for details.
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package errors_test
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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jc "github.com/juju/testing/checkers"
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gc "gopkg.in/check.v1"
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"github.com/juju/errors"
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)
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type functionSuite struct {
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}
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var _ = gc.Suite(&functionSuite{})
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func (*functionSuite) TestNew(c *gc.C) {
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err := errors.New("testing") //err newTest
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c.Assert(err.Error(), gc.Equals, "testing")
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c.Assert(errors.Cause(err), gc.Equals, err)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["newTest"].String())
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}
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func (*functionSuite) TestErrorf(c *gc.C) {
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err := errors.Errorf("testing %d", 42) //err errorfTest
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c.Assert(err.Error(), gc.Equals, "testing 42")
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c.Assert(errors.Cause(err), gc.Equals, err)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["errorfTest"].String())
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}
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func (*functionSuite) TestTrace(c *gc.C) {
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first := errors.New("first")
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err := errors.Trace(first) //err traceTest
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c.Assert(err.Error(), gc.Equals, "first")
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c.Assert(errors.Cause(err), gc.Equals, first)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["traceTest"].String())
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c.Assert(errors.Trace(nil), gc.IsNil)
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}
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func (*functionSuite) TestAnnotate(c *gc.C) {
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first := errors.New("first")
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err := errors.Annotate(first, "annotation") //err annotateTest
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c.Assert(err.Error(), gc.Equals, "annotation: first")
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c.Assert(errors.Cause(err), gc.Equals, first)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["annotateTest"].String())
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c.Assert(errors.Annotate(nil, "annotate"), gc.IsNil)
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}
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func (*functionSuite) TestAnnotatef(c *gc.C) {
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first := errors.New("first")
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err := errors.Annotatef(first, "annotation %d", 2) //err annotatefTest
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c.Assert(err.Error(), gc.Equals, "annotation 2: first")
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c.Assert(errors.Cause(err), gc.Equals, first)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["annotatefTest"].String())
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c.Assert(errors.Annotatef(nil, "annotate"), gc.IsNil)
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}
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func (*functionSuite) TestDeferredAnnotatef(c *gc.C) {
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// NOTE: this test fails with gccgo
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if runtime.Compiler == "gccgo" {
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c.Skip("gccgo can't determine the location")
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}
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first := errors.New("first")
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test := func() (err error) {
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defer errors.DeferredAnnotatef(&err, "deferred %s", "annotate")
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return first //err deferredAnnotate
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}
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err := test()
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c.Assert(err.Error(), gc.Equals, "deferred annotate: first")
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c.Assert(errors.Cause(err), gc.Equals, first)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["deferredAnnotate"].String())
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err = nil
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errors.DeferredAnnotatef(&err, "deferred %s", "annotate")
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c.Assert(err, gc.IsNil)
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}
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func (*functionSuite) TestWrap(c *gc.C) {
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first := errors.New("first") //err wrapFirst
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detailed := errors.New("detailed")
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err := errors.Wrap(first, detailed) //err wrapTest
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c.Assert(err.Error(), gc.Equals, "detailed")
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c.Assert(errors.Cause(err), gc.Equals, detailed)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapFirst"].String())
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapTest"].String())
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}
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func (*functionSuite) TestWrapOfNil(c *gc.C) {
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detailed := errors.New("detailed")
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err := errors.Wrap(nil, detailed) //err nilWrapTest
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c.Assert(err.Error(), gc.Equals, "detailed")
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c.Assert(errors.Cause(err), gc.Equals, detailed)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["nilWrapTest"].String())
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}
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func (*functionSuite) TestWrapf(c *gc.C) {
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first := errors.New("first") //err wrapfFirst
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detailed := errors.New("detailed")
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err := errors.Wrapf(first, detailed, "value %d", 42) //err wrapfTest
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c.Assert(err.Error(), gc.Equals, "value 42: detailed")
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c.Assert(errors.Cause(err), gc.Equals, detailed)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapfFirst"].String())
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapfTest"].String())
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}
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func (*functionSuite) TestWrapfOfNil(c *gc.C) {
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detailed := errors.New("detailed")
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err := errors.Wrapf(nil, detailed, "value %d", 42) //err nilWrapfTest
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c.Assert(err.Error(), gc.Equals, "value 42: detailed")
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c.Assert(errors.Cause(err), gc.Equals, detailed)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["nilWrapfTest"].String())
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}
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func (*functionSuite) TestMask(c *gc.C) {
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first := errors.New("first")
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err := errors.Mask(first) //err maskTest
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c.Assert(err.Error(), gc.Equals, "first")
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c.Assert(errors.Cause(err), gc.Equals, err)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["maskTest"].String())
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c.Assert(errors.Mask(nil), gc.IsNil)
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}
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func (*functionSuite) TestMaskf(c *gc.C) {
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first := errors.New("first")
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err := errors.Maskf(first, "masked %d", 42) //err maskfTest
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c.Assert(err.Error(), gc.Equals, "masked 42: first")
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c.Assert(errors.Cause(err), gc.Equals, err)
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c.Assert(errors.Details(err), jc.Contains, tagToLocation["maskfTest"].String())
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c.Assert(errors.Maskf(nil, "mask"), gc.IsNil)
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}
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func (*functionSuite) TestCause(c *gc.C) {
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c.Assert(errors.Cause(nil), gc.IsNil)
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c.Assert(errors.Cause(someErr), gc.Equals, someErr)
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fmtErr := fmt.Errorf("simple")
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c.Assert(errors.Cause(fmtErr), gc.Equals, fmtErr)
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err := errors.Wrap(someErr, fmtErr)
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c.Assert(errors.Cause(err), gc.Equals, fmtErr)
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err = errors.Annotate(err, "annotated")
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c.Assert(errors.Cause(err), gc.Equals, fmtErr)
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err = errors.Maskf(err, "maksed")
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c.Assert(errors.Cause(err), gc.Equals, err)
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// Look for a file that we know isn't there.
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dir := c.MkDir()
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_, err = os.Stat(filepath.Join(dir, "not-there"))
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c.Assert(os.IsNotExist(err), jc.IsTrue)
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err = errors.Annotatef(err, "wrap it")
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// Now the error itself isn't a 'IsNotExist'.
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c.Assert(os.IsNotExist(err), jc.IsFalse)
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// However if we use the Check method, it is.
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c.Assert(os.IsNotExist(errors.Cause(err)), jc.IsTrue)
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}
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func (s *functionSuite) TestDetails(c *gc.C) {
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if runtime.Compiler == "gccgo" {
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c.Skip("gccgo can't determine the location")
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}
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c.Assert(errors.Details(nil), gc.Equals, "[]")
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otherErr := fmt.Errorf("other")
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checkDetails(c, otherErr, "[{other}]")
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err0 := newEmbed("foo") //err TestStack#0
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checkDetails(c, err0, "[{$TestStack#0$: foo}]")
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err1 := errors.Annotate(err0, "bar") //err TestStack#1
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checkDetails(c, err1, "[{$TestStack#1$: bar} {$TestStack#0$: foo}]")
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err2 := errors.Trace(err1) //err TestStack#2
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checkDetails(c, err2, "[{$TestStack#2$: } {$TestStack#1$: bar} {$TestStack#0$: foo}]")
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}
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type tracer interface {
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StackTrace() []string
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}
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func (*functionSuite) TestErrorStack(c *gc.C) {
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for i, test := range []struct {
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message string
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generator func() error
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expected string
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tracer bool
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}{
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{
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message: "nil",
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generator: func() error {
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return nil
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},
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}, {
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message: "raw error",
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generator: func() error {
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return fmt.Errorf("raw")
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},
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expected: "raw",
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}, {
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message: "single error stack",
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generator: func() error {
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return errors.New("first error") //err single
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},
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expected: "$single$: first error",
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tracer: true,
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}, {
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message: "annotated error",
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generator: func() error {
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err := errors.New("first error") //err annotated-0
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return errors.Annotate(err, "annotation") //err annotated-1
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},
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expected: "" +
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"$annotated-0$: first error\n" +
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"$annotated-1$: annotation",
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tracer: true,
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}, {
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message: "wrapped error",
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generator: func() error {
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err := errors.New("first error") //err wrapped-0
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return errors.Wrap(err, newError("detailed error")) //err wrapped-1
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},
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expected: "" +
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"$wrapped-0$: first error\n" +
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"$wrapped-1$: detailed error",
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tracer: true,
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}, {
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message: "annotated wrapped error",
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generator: func() error {
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err := errors.Errorf("first error") //err ann-wrap-0
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err = errors.Wrap(err, fmt.Errorf("detailed error")) //err ann-wrap-1
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return errors.Annotatef(err, "annotated") //err ann-wrap-2
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},
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expected: "" +
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"$ann-wrap-0$: first error\n" +
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"$ann-wrap-1$: detailed error\n" +
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"$ann-wrap-2$: annotated",
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tracer: true,
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}, {
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message: "traced, and annotated",
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generator: func() error {
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err := errors.New("first error") //err stack-0
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err = errors.Trace(err) //err stack-1
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err = errors.Annotate(err, "some context") //err stack-2
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err = errors.Trace(err) //err stack-3
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err = errors.Annotate(err, "more context") //err stack-4
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return errors.Trace(err) //err stack-5
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},
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expected: "" +
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"$stack-0$: first error\n" +
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"$stack-1$: \n" +
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"$stack-2$: some context\n" +
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"$stack-3$: \n" +
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"$stack-4$: more context\n" +
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"$stack-5$: ",
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tracer: true,
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}, {
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message: "uncomparable, wrapped with a value error",
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generator: func() error {
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err := newNonComparableError("first error") //err mixed-0
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err = errors.Trace(err) //err mixed-1
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err = errors.Wrap(err, newError("value error")) //err mixed-2
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err = errors.Maskf(err, "masked") //err mixed-3
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err = errors.Annotate(err, "more context") //err mixed-4
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return errors.Trace(err) //err mixed-5
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},
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expected: "" +
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"first error\n" +
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"$mixed-1$: \n" +
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"$mixed-2$: value error\n" +
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"$mixed-3$: masked\n" +
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"$mixed-4$: more context\n" +
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"$mixed-5$: ",
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tracer: true,
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},
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} {
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c.Logf("%v: %s", i, test.message)
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err := test.generator()
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expected := replaceLocations(test.expected)
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stack := errors.ErrorStack(err)
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ok := c.Check(stack, gc.Equals, expected)
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if !ok {
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c.Logf("%#v", err)
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}
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tracer, ok := err.(tracer)
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c.Check(ok, gc.Equals, test.tracer)
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if ok {
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stackTrace := tracer.StackTrace()
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c.Check(stackTrace, gc.DeepEquals, strings.Split(stack, "\n"))
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}
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}
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}
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