"regression" tests
==================

Tests for check we don't introduce some bugs again.


Testing if we can build after checking out from a tag.

    SCENARIO    morph build works after checkout from a tag
    GIVEN       a workspace
    AND         a git server
    WHEN        the user checks out the system tag called test-tag
    THEN        morph build the system test-system of the tag test-tag


Running `morph branch` when the branch directory exists doesn't
remove the existing directory.

    SCENARIO    re-running 'morph branch' fails, original branch untouched
    GIVEN       a workspace
    AND         a git server
    WHEN        the user creates a system branch called foo
    THEN        the system branch foo is checked out

The branch is checked out correctly, now it should fail if the user executes
`morph branch` with the same branch name.

    WHEN        the user attempts to create a system branch called foo
    THEN        morph failed
    AND         the branch error message includes the string "File exists"

The branch still checked out.

    AND         the system branch foo is checked out


It doesn't make much sense to be able to build a system with only
bootstrap chunks, since they will have been constructed without a staging
area, hence their results cannot be trusted.

    SCENARIO    building a system with only bootstrap chunks fails
    GIVEN       a workspace
    AND         a git server
    AND         a system containing only bootstrap chunks called bootstrap-system
    WHEN        the user checks out the system branch called master
    AND         the user attempts to build the system bootstrap-system in branch master
    THEN        the build error message includes the string "No non-bootstrap chunks found"


Implementations
---------------

    IMPLEMENTS GIVEN a system containing only bootstrap chunks called (\S+)
    arch=$(run_morph print-architecture)
    cat <<EOF >"$DATADIR/gits/morphs/$MATCH_1.morph"
    name: $MATCH_1
    kind: system
    arch: $arch
    strata:
    - morph: bootstrap-stratum
      repo: test:morphs
      ref: master
    EOF

    cat << EOF > "$DATADIR/gits/morphs/bootstrap-stratum.morph"
    name: bootstrap-stratum
    kind: stratum
    chunks:
    - name: bootstrap-chunk
      repo: test:test-chunk
      ref: master
      morph: test-chunk
      build-mode: bootstrap
      build-depends: []
    EOF

    run_in "$DATADIR/gits/morphs" git add .
    run_in "$DATADIR/gits/morphs" git commit -m "Add bootstrap-system"