1 files changed, 45 insertions, 0 deletions
diff --git a/internal/mapr/funcs/function_test.go b/internal/mapr/funcs/function_test.go
new file mode 100644
index 0000000..415683c
--- /dev/null
+++ b/internal/mapr/funcs/function_test.go
@@ -0,0 +1,45 @@
+package funcs
+
+import "testing"
+
+func TestFunction(t *testing.T) {
+	input := "md5sum($line)"
+	fs, arg, err := NewFunctionStack(input)
+	if err != nil {
+		t.Errorf("error parsing function input '%s': %s (%v)\n", input, err.Error(), fs)
+	}
+	if arg != "$line" {
+		t.Errorf("error parsing function input '%s': expected argument '$line' but got '%s' (%v)\n", input, arg, fs)
+	}
+	t.Log(input, fs, arg)
+
+	result := fs.Call(input)
+	if result != "b38699013d79e50d9d122433753959c1" {
+		t.Errorf("error executing function stack '%s': expected result 'b38699013d79e50d9d122433753959c1' but got '%s' (%v)\n", input, result, fs)
+	}
+
+	input = "maskdigits(md5sum(maskdigits($line)))"
+	fs, arg, err = NewFunctionStack(input)
+	if err != nil {
+		t.Errorf("error parsing function input '%s': %s (%v)\n", input, err.Error(), fs)
+	}
+	if arg != "$line" {
+		t.Errorf("error parsing function input '%s': expected argument '$line' but got '%s' (%v)\n", input, arg, fs)
+	}
+	t.Log(input, fs, arg)
+
+	result = fs.Call(input)
+	if result != ".fac.bbe..bb.........d...a.c..b." {
+		t.Errorf("error executing function stack '%s': expected result '.fac.bbe..bb.........d...a.c..b.' but got '%s' (%v)\n", input, result, fs)
+	}
+
+	input = "md5sum$line)"
+	if fs, _, err := NewFunctionStack(input); err == nil {
+		t.Errorf("Expected error parsing function input '%s' (%v) but got no error\n", input, fs)
+	}
+
+	input = "md5sum(makedigits$line))"
+	if fs, _, err := NewFunctionStack(input); err == nil {
+		t.Errorf("Expected error parsing function input '%s' (%v) but got no error\n", input, fs)
+	}
+}