From f651eb7d3cd6a91f5beddf85c5dbd3f850538a69 Mon Sep 17 00:00:00 2001
From: Gabriel Vasile <gabriel.vasile@email.com>
Date: Thu, 11 Nov 2021 19:47:56 +0200
Subject: [PATCH 1/2] Add regression test for partial JSON detection

For #198
---
 internal/magic/magic_test.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 internal/magic/magic_test.go

diff --git a/internal/magic/magic_test.go b/internal/magic/magic_test.go
new file mode 100644
index 00000000..f89aff84
--- /dev/null
+++ b/internal/magic/magic_test.go
@@ -0,0 +1,20 @@
+package magic
+
+import "testing"
+
+var magicTests = []struct {
+	raw      string
+	limit    uint32
+	res      bool
+	detector Detector
+}{
+	{`["an incomplete JSON array`, 0, false, JSON},
+}
+
+func TestMagic(t *testing.T) {
+	for i, tt := range magicTests {
+		if got := tt.detector([]byte(tt.raw), tt.limit); got != tt.res {
+			t.Errorf("Detector %d error: expected: %t; got: %t", i, tt.res, got)
+		}
+	}
+}

From 9fdffeb8b24585ba997a829717430c82995c6608 Mon Sep 17 00:00:00 2001
From: Gabriel Vasile <gabriel.vasile@email.com>
Date: Thu, 11 Nov 2021 23:48:26 +0200
Subject: [PATCH 2/2] Fix JSON returned for partial documents when readLimit=0

For #198
---
 internal/magic/text.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/internal/magic/text.go b/internal/magic/text.go
index 026c6aad..40bfb190 100644
--- a/internal/magic/text.go
+++ b/internal/magic/text.go
@@ -155,12 +155,14 @@ func Php(raw []byte, limit uint32) bool {
 // JSON matches a JavaScript Object Notation file.
 func JSON(raw []byte, limit uint32) bool {
 	raw = trimLWS(raw)
-	if len(raw) == 0 || (raw[0] != '[' && raw[0] != '{') {
+	// #175 A single JSON string, number or bool is not considered JSON.
+	// JSON objects and arrays are reported as JSON.
+	if len(raw) < 2 || (raw[0] != '[' && raw[0] != '{') {
 		return false
 	}
 	parsed, err := json.Scan(raw)
 	// If the full file content was provided, check there is no error.
-	if len(raw) < int(limit) {
+	if limit == 0 || len(raw) < int(limit) {
 		return err == nil
 	}