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joeduffy 069ab369e9 Improve line-by-line error reporting in test failures 
This change improves the line-by-line error reports when a test fails,
both in the diagnostics messages and AST tree baseline comparisons.
Previously, the test would fail at the first occurrence of a mismatch,
often with little information about the context.  In this change, the
test will now fail with a full dump of the comparison.

For instance, here is the before for a test failure in a new case I'm adding:

     AssertionError: Expected tree line #1 to match
           + expected - actual

                 -     "name": "iface_1",
                 +     "name": "class_1",

In comparison, here is what the test failure looks like now:

      AssertionError: Expected trees to match; 6 did not
      + expected - actual

      -1:     "name": "iface_1",
      -10:                 "I": {
      -14:                         "ident": "I",
      -19:                                 "column": 10
      -23:                                 "column": 11
      -29:                     "interface": true,
      +1:     "name": "class_1",
      +10:                 "C": {
      +14:                         "ident": "C",
      +19:                                 "column": 6
      +23:                                 "column": 7
      +29:                     "abstract": false,
2017-01-12 12:06:15 -08:00
cmd Pass compiler options to template evaluation 2016-12-09 12:42:28 -08:00
docs Rename formats doc to languages 2017-01-10 07:32:01 -08:00
examples Reformat example; use "new()" in place of "resources" 2016-12-16 11:15:33 -08:00
lib Update the library mu examples to the latest 2016-12-16 11:23:37 -08:00
pkg Add orElse/orEmpty template functions 2016-12-09 17:22:09 -08:00
sdk/javascript Make the Mu library a Node package; get it compiling 2016-12-12 17:56:13 -08:00
tools/mujs Improve line-by-line error reporting in test failures 2017-01-12 12:06:15 -08:00
.gitignore Gitignore *.swp files 2016-11-16 09:28:46 -08:00
.gitmodules Add Docker Compose and Kubernetes conversions as submodules 2016-11-01 10:30:39 -07:00
glide.lock Switch back to the official YAML repo 2016-12-09 11:59:05 -08:00
glide.yaml Switch back to the official YAML repo 2016-12-09 11:59:05 -08:00
main.go Move glogging into Mu command startup/teardown 2016-11-19 16:42:27 -08:00
Makefile Test packages when making the project 2016-11-15 19:25:06 -08:00
README.md Add a README pointer to the overview doc 2017-01-01 15:19:22 -08:00

README.md

Mu

Mu is a framework and toolset for creating reusable stacks of services.

If you are learning about Mu for the first time, please see the overview document.

Building and Testing

To build Mu, first clone it into a standard Go workspace:

$ mkdir -p $GOPATH/src/github.com/marapongo
$ git clone git@github.com:marapongo/mu $GOPATH/src/github.com/marapongo/mu

A good default value for GOPATH is ~/go.

Mu needs to know where to look for its runtime, library, etc. By default, it will look in /usr/local/mu, however you can override this with the MUPATH variable. Normally it's easiest just to create a symlink:

$ ln -s $GOPATH/src/github.com/marapongo/mu /usr/local/mu

There is one additional build-time dependency, golint, which can be installed using:

$ go get -u github.com/golang/lint/golint

And placed on your path by:

$ export PATH=$PATH:$GOPATH/bin

At this point you should be able to build and run tests from the root directory:

$ cd $GOPATH/src/github.com/marapongo/mu
$ make

This installs the mu binary into $GOPATH/bin, which may now be run provided make exited successfully.