diff --git a/b2/test/char b/b2/test/char
new file mode 100755
index 0000000..2c88211
--- /dev/null
+++ b/b2/test/char
@@ -0,0 +1,108 @@
+#!/bin/bash
+. ./Common
+
+###############################################################################
+
+tst "characteristics: one file" -dc <<EOF
+<T> = R;
+<FP> = 0402<0603<0805;
+{ FP=<FP> }
+T=<T> {
+	R: { R=#R TOL=%R };
+};
+!-c
+FOO BAR1	T=R FP=0603 R=100R TOL=5%
+FOO BAR2	T=R FP=0603 R=1k TOL=1%
+EOF
+
+expect <<EOF
+FOO BAR1
+    FP=0603 T=R R=100R TOL=-5/+5%
+FOO BAR2
+    FP=0603 T=R R=1000R TOL=-1/+1%
+EOF
+
+#------------------------------------------------------------------------------
+
+tst "characteristics: two files" -dc <<EOF
+<T> = R;
+<FP> = 0402<0603<0805;
+{ FP=<FP> }
+T=<T> {
+	R: { R=#R TOL=%R };
+};
+!-c1
+FOO BAR1	T=R FP=0603 R=100R TOL=5%
+FOO BAR2	T=R FP=0603 R=1k TOL=1%
+!-c2
+FOO BAR3	T=R FP=0402 R=100R TOL=2%
+EOF
+
+expect <<EOF
+FOO BAR1
+    FP=0603 T=R R=100R TOL=-5/+5%
+FOO BAR2
+    FP=0603 T=R R=1000R TOL=-1/+1%
+FOO BAR3
+    FP=0402 T=R R=100R TOL=-2/+2%
+EOF
+
+#------------------------------------------------------------------------------
+
+tst_fail "characteristics: duplicate part" -dc <<EOF
+<T> = R;
+<FP> = 0402<0603<0805;
+{ FP=<FP> }
+T=<T> {
+	R: { R=#R TOL=%R };
+};
+!-c
+FOO BAR1	T=R FP=0603 R=100R TOL=5%
+FOO BAR1	T=R FP=0603 R=1k TOL=1%
+EOF
+
+expect <<EOF
+c:3: FOO BAR1 parameters already defined
+EOF
+
+#------------------------------------------------------------------------------
+
+tst_fail "characteristics: invalid/unknown value" -dc <<EOF
+<T> = R;
+<FP> = 0402<0603<0805;
+{ FP=<FP> }
+T=<T> {
+	R: { R=#R TOL=%R };
+};
+!-c
+FOO BAR1	T=R FP=0603 R=100R TOL=5%
+FOO BAR2	T=R FP=0603 R=1uF
+EOF
+
+expect <<EOF
+c:3: invalid value for R
+EOF
+
+#------------------------------------------------------------------------------
+
+tst "characteristics: unknown parameter" -dc <<EOF
+<T> = R;
+<FP> = 0402<0603<0805;
+{ FP=<FP> }
+T=<T> {
+	R: { R=#R TOL=%R };
+};
+!-c
+FOO BAR1	T=R FP=0603 R=100R TOL=5%
+FOO BAR2	T=R FP=0603 R=1k TOL=1% BLAH=3
+EOF
+
+expect <<EOF
+c:3: warning: extra parameter: BLAH
+FOO BAR1
+    FP=0603 T=R R=100R TOL=-5/+5%
+FOO BAR2
+    FP=0603 T=R R=1000R TOL=-1/+1%
+EOF
+
+###############################################################################