add test for styles

tests/styles.typ

@@ -0,0 +1,31 @@
+#import "../src/export-lib.typ": theorem-kind, theorem-rules, style-simple, style-reversed, numbering-concat, numbering-proof
+
+#let a = theorem-kind("a")
+#let b = theorem-kind("b", style: style-simple.with(qed: true))
+#let c = theorem-kind("c", style: style-reversed)
+#let d = theorem-kind("d", style: style-reversed.with(qed: true))
+#let e = theorem-kind("e", numbering: numbering-concat.with(seperator: ""))
+#let f = theorem-kind("f", numbering: numbering-concat.with(seperator: text(red, "-")))
+#set page(width: 200pt, height: auto, margin: 10pt)
+#show: theorem-rules
+
+#a(lorem(5))
+#b(lorem(5))
+#c(lorem(5))
+#d(lorem(5))
+#e(lorem(5))
+#f(lorem(5))
+
+#set heading(numbering: "1.1")
+= Heading
+
+#a(lorem(5))
+#e(lorem(5))
+#f(lorem(5))
+
+#set heading(numbering: "1.")
+= Heading
+
+#a(lorem(5))
+#e(lorem(5))
+#f(lorem(5))