Add more test cases

test/baseline/opt-file.test

@@ -0,0 +1,12 @@
+test -f opt-file-does-not-exist.dat bal -> 1
+__ERROR__
+Error: Cannot read journal file "opt-file-does-not-exist.dat"
+end test
+
+test -f test/baseline/opt-file1.dat -f test/baseline/opt-file2.dat bal
+                  10  A
+                 -10  C
+--------------------
+                   0
+end test
+

test/baseline/opt-file1.dat

@@ -0,0 +1,4 @@
+2012-03-22 * Test 1
+    A      10.00
+    B
+

test/baseline/opt-file2.dat

@@ -0,0 +1,4 @@
+2012-03-22 * Test 2
+    B      10.00
+    C
+

test/regress/15A80F68.test

@@ -0,0 +1,15 @@
+; Test for: Confusing error message with ledger v3 with invalid input
+
+2008/03/03
+    A                          (2 FOO @ 10.00 EUR) = 20.00 EUR
+    B
+
+test bal -> 1
+__ERROR__
+While parsing file "$FILE", line 4: 
+While parsing posting:
+  A                          (2 FOO @ 10.00 EUR) = 20.00 EUR
+                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Error: Invalid char '@'
+end test
+

test/regress/DDB54BB8.test

@@ -0,0 +1,18 @@
+~ Monthly
+    Aufwand:Bargeld    0,30€
+    Aktiva:Bank:Girokonto  -0,40€
+
+test bal -> 1
+__ERROR__
+While parsing file "$FILE", line 3: 
+Unbalanced remainder is:
+              -0,10€
+Amount to balance against:
+               0,30€
+While parsing periodic transaction:
+> ~ Monthly
+>     Aufwand:Bargeld    0,30€
+>     Aktiva:Bank:Girokonto  -0,40€
+Error: Transaction does not balance
+end test
+

test/regress/E2E479BC.test

@@ -0,0 +1,17 @@
+; Test for: ledger used to show multiple "Income:Unknown" in this
+; case in the past, which it shouldn't.
+
+2009/01/01 Sample
+    Expenses:Alpha       10 A
+    Expenses:Beta        10 B
+    Expenses:Gamma       10 C
+    Income:Unknown
+
+test print
+2009/01/01 Sample
+    Expenses:Alpha                              10 A
+    Expenses:Beta                               10 B
+    Expenses:Gamma                              10 C
+    Income:Unknown
+end test
+