Implement JsonSchema for nonzero signed ints

schemars/tests/expected/nonzero_ints.json

@@ -0,0 +1,33 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "MyStruct",
+  "type": "object",
+  "required": [
+    "nonzero_signed",
+    "nonzero_unsigned",
+    "signed",
+    "unsigned"
+  ],
+  "properties": {
+    "nonzero_signed": {
+      "type": "integer",
+      "format": "int32",
+      "not": {
+        "const": 0
+      }
+    },
+    "nonzero_unsigned": {
+      "type": "integer",
+      "format": "uint32",
+      "minimum": 1.0
+    },
+    "signed": {
+      "type": "integer",
+      "format": "int32"
+    },
+    "unsigned": {
+      "type": "integer",
+      "format": "uint32"
+    }
+  }
+}

schemars/tests/nonzero_ints.rs

@@ -0,0 +1,21 @@
+mod util;
+
+#[cfg(num_nonzero_signed)]
+mod nonzero_ints {
+    use super::*;
+    use schemars::JsonSchema;
+    use util::*;
+
+    #[derive(Debug, JsonSchema)]
+    struct MyStruct {
+        unsigned: u32,
+        nonzero_unsigned: std::num::NonZeroU32,
+        signed: i32,
+        nonzero_signed: std::num::NonZeroI32,
+    }
+
+    #[test]
+    fn nonzero_ints() -> TestResult {
+        test_default_generated_schema::<MyStruct>("nonzero_ints")
+    }
+}