A simple whole-run testing methodology

Add test.sh for comparing against historical recorded runs.

I have not done any extra analysis on cases recorded here.  Rather,
I just want to know when/if any of this output changes.

I couldn't figure out a good way to include these tests within the
"go test" framework.  The tricky bit was figuring out how to set
unmentioned flags back to their default values between runs.  I
deemed adding an 'option' object of some kind built from command
line flags but also buildable by tests to not be worth the complexity
at this time.

diff --git a/test.sh b/test.sh
new file mode 100755 (executable)
index 0000000..c242e3c
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+
+exit_status=0
+
+function t() {
+  expected=$1
+  shift
+  diff -u --label Expected <( echo -n "$expected" ) \
+          --label Actual <( ./planeteer "$@" ) || exit_status=1
+}
+
+t '      850,000 Buy 300 Medical Units
+      850,000 Jump from Earth to Sickonia (2 hyper jump units)
+    3,220,600 Sell 300 Medical Units
+    2,770,600 Buy 300 Heating Units
+    2,770,600 Jump from Sickonia to Hothor (2 hyper jump units)
+    5,200,600 Sell 300 Heating Units
+    4,999,600 Buy 300 Medical Units
+    4,999,600 Jump from Hothor to Sickonia (2 hyper jump units)
+    7,370,200 Sell 300 Medical Units
+    6,920,200 Buy 300 Heating Units
+    6,920,200 Jump from Sickonia to Hothor (2 hyper jump units)
+    9,350,200 Sell 300 Heating Units
+    9,149,200 Buy 300 Medical Units
+    9,149,200 Jump from Hothor to Sickonia (2 hyper jump units)
+   11,519,800 Sell 300 Medical Units
+   11,069,800 Buy 300 Heating Units
+   11,069,800 Jump from Sickonia to Hothor (2 hyper jump units)
+   13,499,800 Sell 300 Heating Units
+   13,298,800 Buy 300 Medical Units
+   13,298,800 Jump from Hothor to Sickonia (2 hyper jump units)
+   15,669,400 Sell 300 Medical Units
+   15,219,400 Buy 300 Heating Units
+   15,219,400 Jump from Sickonia to Hothor (2 hyper jump units)
+   17,649,400 Sell 300 Heating Units
+' --funds 1000000 --start Earth
+
+t '' --funds 1000000 --start Earth --fuel 0
+
+t '      850,000 Buy 300 Medical Units
+      850,000 Jump from Earth to HomeWorld (2 hyper jump units)
+    3,256,900 Sell 300 Medical Units
+' --funds 1000000 --start Earth --fuel 2
+
+t '      850,000 Buy 300 Medical Units
+      850,000 Jump from Earth to Sickonia (2 hyper jump units)
+    3,220,600 Sell 300 Medical Units
+    2,770,600 Buy 300 Heating Units
+    2,770,600 Jump from Sickonia to Hothor (2 hyper jump units)
+    5,200,600 Sell 300 Heating Units
+' --funds 1000000 --start Earth --fuel 4
+
+t '      850,000 Buy 300 Medical Units
+      850,000 Jump from Earth to Sickonia (2 hyper jump units)
+    3,220,600 Sell 300 Medical Units
+    2,770,600 Buy 300 Heating Units
+    2,770,600 Jump from Sickonia to Hothor (2 hyper jump units)
+    5,200,600 Sell 300 Heating Units
+    4,999,600 Buy 300 Medical Units
+    4,999,600 Jump from Hothor to HomeWorld (2 hyper jump units)
+    7,406,500 Sell 300 Medical Units
+' --funds 1000000 --start Earth --fuel 6
+
+exit "$exit_status"