markup/goldmark: latex fences tests

markup/goldmark/integration_test.go

@@ -711,3 +711,74 @@ echo "hello";
 	b := hugolib.Test(t, files)
 	b.AssertFileContent("public/index.html", "<div class=foo><?php\necho \"hello\";\n?>\n</div>")
 }
+
+// Issue #10894
+func TestLatexInlineFences(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- config.toml --
+[markup]
+[markup.goldmark]
+[markup.goldmark.extensions]
+latex = true
+-- content/p1.md --
+---
+title: "p1"
+---
+## LaTeX test
+
+Inline equation that would be mangled by default parser: $a^*=x-b^*$
+
+-- layouts/_default/single.html --
+{{ .Content }}
+`
+
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			NeedsOsFS:   false,
+		},
+	).Build()
+
+	b.AssertFileContent("public/p1/index.html", `
+		$a^*=x-b^*$
+	`)
+}
+
+func TestLatexBlockFences(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- config.toml --
+[markup]
+[markup.goldmark]
+[markup.goldmark.extensions]
+latex = true
+-- content/p1.md --
+---
+title: "p1"
+---
+## LaTeX test
+
+Block equation that would be mangled by default parser:
+
+$$a^*=x-b^*$$
+
+-- layouts/_default/single.html --
+{{ .Content }}
+`
+
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			NeedsOsFS:   false,
+		},
+	).Build()
+
+	b.AssertFileContent("public/p1/index.html", `
+		$a^*=x-b^*$
+	`)
+}