Example #1
0
func (*functionSuite) TestWrapOfNil(c *gc.C) {
	detailed := errors.New("detailed")
	err := errors.Wrap(nil, detailed) //err nilWrapTest
	c.Assert(err.Error(), gc.Equals, "detailed")
	c.Assert(errors.Cause(err), gc.Equals, detailed)
	c.Assert(errors.Details(err), jc.Contains, tagToLocation["nilWrapTest"].String())
}
Example #2
0
func (*functionSuite) TestCause(c *gc.C) {
	c.Assert(errors.Cause(nil), gc.IsNil)
	c.Assert(errors.Cause(someErr), gc.Equals, someErr)

	fmtErr := fmt.Errorf("simple")
	c.Assert(errors.Cause(fmtErr), gc.Equals, fmtErr)

	err := errors.Wrap(someErr, fmtErr)
	c.Assert(errors.Cause(err), gc.Equals, fmtErr)

	err = errors.Annotate(err, "annotated")
	c.Assert(errors.Cause(err), gc.Equals, fmtErr)

	err = errors.Maskf(err, "maksed")
	c.Assert(errors.Cause(err), gc.Equals, err)

	// Look for a file that we know isn't there.
	dir := c.MkDir()
	_, err = os.Stat(filepath.Join(dir, "not-there"))
	c.Assert(os.IsNotExist(err), jc.IsTrue)

	err = errors.Annotatef(err, "wrap it")
	// Now the error itself isn't a 'IsNotExist'.
	c.Assert(os.IsNotExist(err), jc.IsFalse)
	// However if we use the Check method, it is.
	c.Assert(os.IsNotExist(errors.Cause(err)), jc.IsTrue)
}
Example #3
0
func (*functionSuite) TestWrap(c *gc.C) {
	first := errors.New("first") //err wrapFirst
	detailed := errors.New("detailed")
	err := errors.Wrap(first, detailed) //err wrapTest
	c.Assert(err.Error(), gc.Equals, "detailed")
	c.Assert(errors.Cause(err), gc.Equals, detailed)
	c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapFirst"].String())
	c.Assert(errors.Details(err), jc.Contains, tagToLocation["wrapTest"].String())
}
Example #4
0
func (*errorsSuite) TestErrorString(c *gc.C) {
	for i, test := range []struct {
		message   string
		generator func() error
		expected  string
	}{
		{
			message: "uncomparable errors",
			generator: func() error {
				err := errors.Annotatef(newNonComparableError("uncomparable"), "annotation")
				return errors.Annotatef(err, "another")
			},
			expected: "another: annotation: uncomparable",
		}, {
			message: "Errorf",
			generator: func() error {
				return errors.Errorf("first error")
			},
			expected: "first error",
		}, {
			message: "annotated error",
			generator: func() error {
				err := errors.Errorf("first error")
				return errors.Annotatef(err, "annotation")
			},
			expected: "annotation: first error",
		}, {
			message: "test annotation format",
			generator: func() error {
				err := errors.Errorf("first %s", "error")
				return errors.Annotatef(err, "%s", "annotation")
			},
			expected: "annotation: first error",
		}, {
			message: "wrapped error",
			generator: func() error {
				err := newError("first error")
				return errors.Wrap(err, newError("detailed error"))
			},
			expected: "detailed error",
		}, {
			message: "wrapped annotated error",
			generator: func() error {
				err := errors.Errorf("first error")
				err = errors.Annotatef(err, "annotated")
				return errors.Wrap(err, fmt.Errorf("detailed error"))
			},
			expected: "detailed error",
		}, {
			message: "annotated wrapped error",
			generator: func() error {
				err := errors.Errorf("first error")
				err = errors.Wrap(err, fmt.Errorf("detailed error"))
				return errors.Annotatef(err, "annotated")
			},
			expected: "annotated: detailed error",
		}, {
			message: "traced, and annotated",
			generator: func() error {
				err := errors.New("first error")
				err = errors.Trace(err)
				err = errors.Annotate(err, "some context")
				err = errors.Trace(err)
				err = errors.Annotate(err, "more context")
				return errors.Trace(err)
			},
			expected: "more context: some context: first error",
		}, {
			message: "traced, and annotated, masked and annotated",
			generator: func() error {
				err := errors.New("first error")
				err = errors.Trace(err)
				err = errors.Annotate(err, "some context")
				err = errors.Maskf(err, "masked")
				err = errors.Annotate(err, "more context")
				return errors.Trace(err)
			},
			expected: "more context: masked: some context: first error",
		},
	} {
		c.Logf("%v: %s", i, test.message)
		err := test.generator()
		ok := c.Check(err.Error(), gc.Equals, test.expected)
		if !ok {
			c.Logf("%#v", test.generator())
		}
	}
}