Add "morph print-architecture" subcommand

1 files changed, 42 insertions, 0 deletions

diff --git a/yarns/print-architecture.yarn b/yarns/print-architecture.yarn
new file mode 100644
index 00000000..e45d7d1b
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+++ b/yarns/print-architecture.yarn
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+"morph print-architecture" tests
+================================
+
+This is short and simple. Morph can print the name for the current
+architecture, and we verify not that it is correct, but that exactly
+one line is printed to the standard output. The reason we're not
+checking it's correct is because that would require the test code
+to duplicate the architecture name list that is in the code already,
+and that wouldn't help with tests. However, verifying there's exactly
+one line in stdout (and nothing in stderr) means the plugin does at
+least something sensible.
+
+Oh, and the one line should contain no spaces, either.
+
+    SCENARIO morph print-architecture prints out a single word
+    WHEN morph print-architecture is run
+    THEN stdout contains a single line
+    AND stdout contains no spaces
+    AND stderr is empty
+
+    IMPLEMENTS WHEN morph print-architecture is run
+    run_morph print-architecture > "$DATADIR/stdout" 2> "$DATADIR/stderr"
+
+    IMPLEMENTS THEN stdout contains a single line
+    n=$(wc -l < "$DATADIR/stdout")
+    if [ "$n" != 1 ]
+    then
+        die "stdout contains $n lines, not 1"
+    fi
+
+    IMPLEMENTS THEN stdout contains no spaces
+    n=$(tr < "$DATADIR/stdout" -cd ' ' | wc -c)
+    if [ "$n" != 0 ]
+    then
+        die "stdout contains spaces"
+    fi
+
+    IMPLEMENTS THEN stderr is empty
+    if [ -s "$DATADIR/stderr" ]
+    then
+        die "stderr is not empty"
+    fi