Add a test for irand() limits in bc

This test found a bug which will be fixed in the next commit.

Signed-off-by: Gavin D. Howard <gavin@gavinhoward.com>

4 files changed, 143 insertions, 1 deletions

diff --git a/manuals/development.md b/manuals/development.md
index 333538df..aea41e2d 100644
--- a/manuals/development.md
+++ b/manuals/development.md
@@ -1,6 +1,6 @@
 # Development
 
-Updated: 13 Mar 2023
+Updated: 27 Mar 2023
 
 This document is meant for the day when I (Gavin D. Howard) get [hit by a
 bus][1]. In other words, it's meant to make the [bus factor][1] a non-issue.
@@ -2260,6 +2260,10 @@ rand
 
 :   Tests the pseudo-random number generator and its special stack handling.
 
+rand_limits
+
+:   Tests the limits of the pseudo-random number generator `irand()`.
+
 recursive_arrays
 
 :   Tested the slab vector undo ability in used in `bc_parse_name()` when it
diff --git a/tests/bc/all.txt b/tests/bc/all.txt
index 3d0ea05b..c710534a 100644
--- a/tests/bc/all.txt
+++ b/tests/bc/all.txt
@@ -47,6 +47,7 @@ misc7
 misc8
 void
 rand
+rand_limits
 recursive_arrays
 divmod
 modexp
diff --git a/tests/bc/rand_limits.txt b/tests/bc/rand_limits.txt
new file mode 100644
index 00000000..462313bf
--- /dev/null
+++ b/tests/bc/rand_limits.txt
@@ -0,0 +1,26 @@
+seed = 12183415694832323910165063565742029266.78201143488173352403523006\
+	   17939450703787369504276248076613097826033345478457018711188931947\
+	   5643844725709641352295875549316406250
+
+for (i = 1; i <= 37; ++i)
+{
+	irand(10^i)
+}
+
+seed = 12183415694832323910165063565742029266.82951754507405817776622978\
+	   09630984098584076072986006731059784797092101840727292180396879039\
+	   9608224106486886739730834960937500000
+
+for (i = 1; i <= 37; ++i)
+{
+	irand(10^i)
+}
+
+seed = 149423560533592712773538909996244073918.29527526125449592086425200650563\
+410377957291848306408247710650762029718616172500631291732153815843275879\
+160501062870025634765625
+
+for (i = 1; i <= 37; ++i)
+{
+	irand(10^i)
+}
diff --git a/tests/bc/rand_limits_results.txt b/tests/bc/rand_limits_results.txt
new file mode 100644
index 00000000..d02693bc
--- /dev/null
+++ b/tests/bc/rand_limits_results.txt
@@ -0,0 +1,111 @@
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