Disambiguate reporter output (#216)

The reporter tries to aggresively elide data that is not interesting
to the user. However, doing so many result in an output that does not
visually indicate the difference between semantically different objects.
This CL modifies the reporter to try increasingly verbose presets until
two different objects are formatted differently.

This CL includes a custom implementation of reflect.Type.String that
can print the type with fully qualified names to disambiguate types
that happen to have the same base package name.

Fixes #194
10 files changed
tree: 04b9b2f2bc3a703c4515b20f64ffa10880358c1b
  1. cmp/
  2. .travis.yml
  3. CONTRIBUTING.md
  4. go.mod
  5. go.sum
  6. LICENSE
  7. README.md
README.md

Package for equality of Go values

GoDev Build Status

This package is intended to be a more powerful and safer alternative to reflect.DeepEqual for comparing whether two values are semantically equal.

The primary features of cmp are:

  • When the default behavior of equality does not suit the needs of the test, custom equality functions can override the equality operation. For example, an equality function may report floats as equal so long as they are within some tolerance of each other.

  • Types that have an Equal method may use that method to determine equality. This allows package authors to determine the equality operation for the types that they define.

  • If no custom equality functions are used and no Equal method is defined, equality is determined by recursively comparing the primitive kinds on both values, much like reflect.DeepEqual. Unlike reflect.DeepEqual, unexported fields are not compared by default; they result in panics unless suppressed by using an Ignore option (see cmpopts.IgnoreUnexported) or explicitly compared using the AllowUnexported option.

See the documentation for more information.

This is not an official Google product.

Install

go get -u github.com/google/go-cmp/cmp

License

BSD - See LICENSE file